Which would you choose to measure a high value of
current e.g 2000A
The bar primary type current transformer or the wound primary type
and why?
Answers
When measuring a high value of current such as 2000A, the recommended transformer type to choose is the bar primary type current transformer. This is because this type of transformer is designed to measure large currents using a bus bar without the need to disconnect it from its power source.
1. Higher accuracyBar primary transformers are capable of providing high accuracy measurements in high current applications due to their design. They have a large core that can accommodate a bus bar and accurately measure the current flowing through it. This means that there is less chance of measurement errors occurring.
2. SafetyThe bar primary type transformer is safer than the wound primary type. This is because the former type of transformer is specifically designed for bus bar applications, meaning there is less chance of electric shock or damage to equipment occurring during measurement. The wound primary type transformer, on the other hand, is not as safe as it requires the use of a shunt that must be disconnected from the power source before it can be measured. This poses a safety hazard.
3. Ease of installation and useThe bar primary type transformer is also easier to install and use. It requires minimal installation procedures and can be used for both indoor and outdoor applications. Overall, when measuring high value currents such as 2000A, the bar primary type current transformer is the best choice. It provides high accuracy, safety, and ease of installation and use.
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Related Questions
A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her average speed?
A) 2. 5 m/s
B) 0 m/s
C) 5. 0 m/s
D) 1. 3 m/s
E) 10 m/s
Answers
1.3 m/s is the average speed of runner. Option D is the correct answer.
The total distance covered by the runner in one lap is equal to the distance around the two semicircles plus the distance along the two parallel lines. The distance around one semicircle is πr = π(49 m) and since there are two semicircles, the total distance around the semicircles is 2π(49 m). The distance along each parallel line is 96 m, and since there are two parallel lines, the total distance along the parallel lines is 2(96 m). Therefore, the total distance covered by the runner in one lap is:
Total distance = 2π(49 m) + 2(96 m) = 2π(49 m + 48 m) = 2π(97 m)
The time taken by the runner to complete one lap is given as 100 seconds. Therefore, her average speed is:
Average speed = Total distance / Time taken = [2π(97 m)] / (100 s) = 1.93 m/s
Rounding to two significant figures, the average speed of the runner is 1.9 m/s, which corresponds to option (D) 1.3 m/s.
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In what way was the R-7 rocket an improvement over the V-2 rocket? A. It could carry humans into space. B. It could land safely and be used again. C. It could launch a satellite into orbit around Earth. D. It could fly straight up into the atmosphere.
Answers
The R-7 rocket has an improvement such that it could launch a satellite into orbit around the earth. Option C.
R-7 rocket vs V-2 rocketThe R-7 rocket was a significant improvement over the V-2 rocket in several ways. These include:
Greater payload capacityGreater rangeMulti-stage designIntercontinental ballistic missile (ICBM) capabilityModular designThese attributes enable the R-7 rocket to be able to launch satellites into orbit.
In summary, the R-7 rocket was a significant improvement over the V-2 rocket in terms of payload capacity, range, multi-stage design, ICBM capability, and modular design.
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How Calculate the frequency of ultraviolet
light
Answers
frequency = velocity divided by wavelength
Ultraviolet (UV) radiation lies between wavelengths of about 400 nanometres and 10 nanometres, corresponding to frequencies of 7.5 × 1014 Hz to 3 × 1016 Hz.
if kp is the equilibrium constant for the reaction 2 a (g) b (g) ⇌ 3 c (g). what is the equilibrium constant (in terms of kp) for the reaction 6 a (g) 3 b (g) ⇌ 9 c (g)?
Answers
The equilibrium constant for reaction 6 a (g) 3 b (g) ⇌ 9 c (g) is \(Kp^{3}\) .
Equilibrium is a state in which the forward and backward reactions of a chemical system occur at the same rate. This means that the concentration of reactants and products remains constant over time. The equilibrium constant, Kp, is a measure of the relative concentrations of reactants and products at equilibrium.
Equation 2 a (g) b (g) ⇌ 3 c (g) represents the reaction of two molecules of a (g) with one molecule of b (g) to form three molecules of c (g). The equilibrium constant, Kp, is a measure of the relative concentrations of a (g), b (g), and c (g) at equilibrium.
In reaction 6 a (g) 3 b (g) ⇌ 9 c (g), the ratio of the reactants and products is different from the previous reaction. Therefore, the equilibrium constant for this reaction will also be different from the previous reaction.
To determine the equilibrium constant for this reaction, we can use the relationship between the initial concentrations of the reactants and products and the equilibrium concentrations of the reactants and products.
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name the gas that is released into the test tube and state how we test for the gas released
Answers
The name of the gas that is released into the test tube is Oxygen and the test is the glowing splint test.
How to test for oxygen ?The Elodea plant releases oxygen when sunlight is present as it undergoes the process of photosynthesis, converting carbon dioxide and water into glucose and oxygen with the help of energy from sunlight.
You can determine whether oxygen is present by performing the glowing splint test. First, you need to light a wooden splint and ensure that it is glowing but not in flames. Carefully collect the gas emitted from the Elodea plant in a suitable container such as a test tube. Afterward, swiftly insert the still-glowing splint into the collected gas' container or test tube. If the gas comprises mainly oxygen, the glowing splint will reignite and burn more intensely than before, indicating the existence of oxygen.
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The full question is:
A test tube is filled with water and a green plant called Elodea. When the plant is exposed to sunlight, it begins to produce bubbles.
Name the gas that is released into the test tube and state how we test for the gas released .
a). Show that the average speed of Leslie is 10 km/h when she runs to the store 5 km away in 30 min.
(b) How fast is this in m/s?
6. (a) Calculate the acceleration for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4 s.
(b) What would acceleration be if the ball rolls at 60 m/s?
Answers
Acceleration is a physical quantity that describes the rate of change in velocity of an object over time. It is a vector quantity, which means it has both magnitude and direction, and is measured in units of meters per second squared (m/s²).
Describe Acceleration
When an object is accelerating, its velocity is changing, either by increasing or decreasing in speed or changing direction. The magnitude of the acceleration depends on the force applied to the object, which can come from a variety of sources such as gravity, friction, or electromagnetism.
The formula for acceleration is:
a = (v2 - v1) / t
where a is the acceleration, v2 is the final velocity, v1 is the initial velocity, and t is the time it takes to go from v1 to v2.
If an object is moving in a straight line with a constant acceleration, its velocity can be calculated by the following equation:
v = v0 + at
where v is the final velocity, v0 is the initial velocity, a is the acceleration, and t is the time.
Acceleration is a fundamental concept in physics and is used to describe the motion of objects in a wide variety of situations, including free-fall, projectile motion, circular motion, and the behavior of fluids. It is also essential in engineering and design, where it is used to calculate the performance and efficiency of machines and vehicles.
(a) To find the average speed of Leslie, we can use the formula:
average speed = total distance / total time
Leslie runs to the store 5 km away in 30 minutes (0.5 hours), so the total distance is 5 km and the total time is 0.5 hours.
average speed = 5 km / 0.5 hours = 10 km/h
Therefore, the average speed of Leslie is 10 km/h when she runs to the store 5 km away in 30 minutes.
(b) To convert km/h to m/s, we can use the conversion factor:
1 km/h = 0.2778 m/s
So, the speed of Leslie in m/s is:
10 km/h × 0.2778 m/s/km/h = 2.78 m/s
Therefore, Leslie's speed is 2.78 m/s.
(a) To calculate the acceleration of the ball, we can use the formula:
acceleration = (final velocity - initial velocity) / time
The ball starts from rest, so the initial velocity is 0 m/s. After 4 seconds, it gains a speed of 30 m/s.
acceleration = (30 m/s - 0 m/s) / 4 s = 7.5 m/s²
Therefore, the acceleration of the ball is 7.5 m/s².
(b) If the ball rolls at 60 m/s, we can use the same formula to find the acceleration:
acceleration = (60 m/s - 0 m/s) / 4 s = 15 m/s²
Therefore, the acceleration of the ball would be 15 m/s² if it rolls at 60 m/s.
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A sphere with radius 10 cm is filled with a uniform charge distribution. The magnitude of the electric field at a point 5 cm from the center of the sphere is 3014 N/coul. Use this fact to calculate the charge density rho inside the sphere.
Answers
Answer:15 cm
Explanation: u had 10cm. them u had another 5cm
6. How much does it cost to operate a 100 W light bulb for 24 hours if electrical energy costs
0.080 dollars per KW.h?
Answers
It would cost $0.192 to operate a 100 W light bulb for 24 hours if electrical energy costs $0.080 per kW.h.
First, we need to convert the power of the light bulb from watts (W) to kilowatts (kW), since the electrical energy cost is given in dollars per kilowatt-hour (kW.h).
100 W is equal to 0.1 kW (since 1 kW = 1000 W).
The energy consumed by the light bulb in 24 hours can be calculated using the formula:
Energy consumed = Power x Time
where power is in kW and time is in hours. So, for a 100 W light bulb running for 24 hours, the energy consumed is:
Energy consumed = 0.1 kW x 24 hours = 2.4 kW.h
The cost of this energy can be calculated by multiplying the energy consumed by the cost per kW.h:
Cost = Energy consumed x Cost per kW.h
Plugging in the values, we get:
Cost = 2.4 kW.h x $0.080/kW.h = $0.192
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Round off the following numbers to three significant digits. (a) 15462
Answers
15462 rounded off to three significant figures is 15500.
What are significant figures?Significant figures are digits that are meaningful with respect to the precision of a measurement.
According to this question, the breakdown of the given number is as follows:
Decimal notation: 15462No. of significant figures: 5No. of decimals: 0Scientific notation: 1.5462 × 104However, if rounded off to three significant figures (3.s.f), the number becomes;
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a neuron has a negative electrical charge of about 70 millivolts when it is
Answers
at rest. When a neuron is activated, its electrical charge changes to a positive charge of about 40 millivolts.
a capacitor consists of a container with two square metal walls of side I 40 cm. parallel and placed vertically, one of which is movable in the direction z orthogonal to it. The distance between the two walls is initially zo 5 mm. The remaining walls of the vessel are made of insulating material, ie, the two metal walls are insulated. The vessel is initially filled up to the level = 30 cm with a liquid of dielectric constante 2.5 and a charge Q= 15 mC is deposited on the plates. Determine, as a function of r a) the capacitance of the container: b) the electrostatic energy stored by the capacitor; e) the electrostatic force acting on the metal walls (ie. the contribution of pressure is not calculated hydrostatic). Then compute a) b) c) giving the values for 10mm.
Answers
a) The capacitance of the container can be determined using the formula C = ε₀A/d, where ε₀ is the vacuum permittivity, A is the area of the plates, and d is the distance between the plates. In this case, the area A is given by the square of the side length, which is 40 cm. The distance d is initially 5 mm.
b) The electrostatic energy stored by the capacitor can be calculated using the formula U = (1/2)CV², where U is the energy, C is the capacitance, and V is the voltage across the capacitor. In this case, the voltage V can be calculated by dividing the charge Q by the capacitance C.
c) The electrostatic force acting on the metal walls can be determined using the formula F = (1/2)CV²/d, where F is the force, C is the capacitance, V is the voltage, and d is the distance between the plates. The force is exerted in the direction of the movable plate.
a) The capacitance of the container is a measure of its ability to store electric charge. It depends on the geometry of the container and the dielectric constant of the material between the plates. In this case, since the container consists of two parallel square plates, the capacitance can be calculated using the formula C = ε₀A/d.
b) The electrostatic energy stored by the capacitor is the energy associated with the electric field between the plates. It is given by the formula U = (1/2)CV², where C is the capacitance and V is the voltage across the capacitor. The energy stored increases as the capacitance and voltage increase.
c) The electrostatic force acting on the metal walls is exerted due to the presence of the electric field between the plates. It can be calculated using the formula F = (1/2)CV²/d, where C is the capacitance, V is the voltage, and d is the distance between the plates. The force is exerted in the direction of the movable plate and increases with increasing capacitance, voltage, and decreasing plate separation.
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A student slides her 80.0-kg desk across the level floor of her dormitory room a distance 2.00 m at constant speed. If the coefficient of kinetic friction between the desk and the floor is 0.400, how much work did she do?
Answers
Answer:
628 J
Explanation:
Force of friction x distance = work
force of friction = normal force * coeff
= ( 80 kg * 9.81 m/s^2) * .4 = 313.92 N
3139.2N * 2 m = 627.84 J = ~ 628 J
1. A circuit is measured to have a current of 11.5 milliamperes. Which of the following values are equivalent to this measurement?
0 1150 amperes
0 1.15 10-2 amperes
0 0.0115 amperes
0 11.5 10-3 amperes
0 1.1510- amperes
Answers
The equivalent measurement of 11.5 milliamperes is 11.5 x 10⁻³ amperes.
What is an electric current?The rate of flow of charge per unit cross - sectional area is called electric current. Mathematically -
i = dq/dt
From this -
dq = i dt
∫dq = ∫i dt
Q = it
Current is measured in amperes and is a Tensor quantity.
Given is a circuit that measured a current of 11.5 milli amperes.
Now, the current in milli amperes is used to give the measurement of small amount of current. One milliampere of current is equivalent to -
1 mA = (1/1000) A = 10 ⁻³ A
So, in order to calculate the total current in amperes, we will multiply 11.5 milliamperes by 10 ⁻³ as follows -
11.5 milliamperes [mA] = 11.5 x 10⁻³ amperes[A]
Therefore, the equivalent measurement of 11.5 milliamperes is 11.5 x 10⁻³ amperes.
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Jared lifts a 35.0 kg of box from the floor to a table that is 1.75 meters above the floor. How much gravitational potential energy does the box gain?
Answers
Given,
The mass of the box, m=35.0 kg
The height to which the box was lifted, h=1.75 m
Potential energy is the energy possessed by an object due to its position.
The gravitational potential energy gained by the box is,
\(E=\text{mgh}\)Where g is the acceleration due to gravity.
On substituting the known values,
\(\begin{gathered} E=35.0\times9.8\times1.75 \\ =600.25\text{ J} \end{gathered}\)Thus the gravitational potential energy gained by the box is 600.25 J
An object is moving across a surface, but it does not gain or lose speed. Which best describes the object’s force?
The net force is positive.
The net force is zero.
The positive force is greater than the negative force.
The negative force is greater than the positive force.
Answers
Answer:
An object is moving across a surface, but it does not gain or lose speed, the object's net force is zero.
Explanation: The net force means the vector sum of all the forces acting on an object
Answer:
well its not C
Explanation:
If a car travels 23.8 meters in 4.2 seconds, what is its speed?
Put your units in the form of a correct abbreviation (example, write s for seconds, m
for meters, or m/s for meters per second).
Answers
Initial velocity * time = 0 since we assume that the car is launching from start without motion.
So, displacement = 0.5 * acceleration * time ^ 2
23.8 = 0.5 * acceleration * 4.2^2
23.8 = 0.5 * 17.64 * acceleration
23.8 = 8.82 * acceleration
23.8/8.82 = acceleration = 2.69 m/s^2
Final Velocity = initial velocity + acceleration * time
Final velocity = 0 + 2.69 * 4.2 = 11.3 m/s
Calculate the energy used by a radio of power 30W in 1 minute.
Answers
Answer:
1800 j or 1.8 kj
Explanation:
Energy used = power (measured in watts) multiplied by time (measured by seconds)
1 minute is 60 seconds
30 multiplied by 60 is 1800
Answer:
1800 joule
Explanation:
Power (P) = 30W
Time (T) = 1 min =60 sec
P =(W/T)
30 = W / 60
W = 1800 joule
We know that Energy Is equivalent to Work done. So Energy used is 1800 joule.
Assume that the temperature outside is 293 Kelvin but your only familiar with the Fahrenheit scale. Do you need to wear a hat and gloves when you go outside? To find out, convert the kelvin temperature to fahrenheit.
Answers
The temperature in Fahrenheit is 67.73 degrees Fahrenheit
(293K − 273.15) × 9/5 + 32 = 67.73°F
Typically, 67.73°F is not considered sweater weather. However, you can dress in a sweater in this temperature if you typically feel cold. If you want to create a fashionable image but are worried about perspiring, wrap the sweater over your shoulders.
What is Fahrenheit in temperature ?Water freezes at 32 degrees Fahrenheit and boils at 212 degrees Fahrenheit on the Fahrenheit scale, which is used to measure temperature. It is denoted by the °F sign.
Temperature is measured in degrees Fahrenheit. It is based on the Fahrenheit scale, which was first put forth by physicist Daniel Gabriel Fahrenheit in the 1700s. The boiling point of water is 212 degrees Fahrenheit, whereas the melting point of ice is 32 degrees Fahrenheit, according to the Fahrenheit scale.Learn more about Temperature here:
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PLSS HELLPPP MEEE WILL MARK BRAINLIEST
Answers
Answer:
a:s
b:s
c:r
d: r
e: s
f: s
g: s
Explanation:
right auricale is bigger then left aurical, why?
Answers
Explanation:
Veins carry deoxygenated blood from different parts of the body to our heart. ... Since a larger volume of blood is collected in the right auricle than that of the left auricle, right auricle is larger than the left auricle.
You and your friend see a ball rolling across the floor to the right. Your friend says
that because it is moving to the right, it must have a net force on it pushing it to
the right. Do you agree with her? Why or why not?
Your answer
Answers
Answer:
unforturnitly
Explanation:
step unstepable
) A cable car at a ski resort carries skiers a distance of 6. 8 km. The cable which moves the car is driven by a pulley with diameter 3. 0 m. Assuming no slippage, how fast must the pulley rotate for the cable car to make the trip in 12 minutes
Answers
The pulley must rotate at a speed of approximately 1.99 radians per second for the cable car to make the trip in 12 minutes.
To determine the rotational speed of the pulley, we need to calculate the angular velocity (ω) in radians per second.
Distance traveled by the cable car = 6.8 km
Time taken to make the trip = 12 minutes
First, let's convert the distance to meters:
Distance = 6.8 km = 6,800 meters
Next, let's convert the time to seconds:
Time = 12 minutes = 12 * 60 seconds = 720 seconds
The linear speed (v) of the cable car can be calculated using the formula:
v = distance / time
v = 6,800 meters / 720 seconds
v ≈ 9.44 m/s
The linear speed of the cable car is equal to the circumference of the pulley multiplied by its angular velocity:
v = 2πrω
where r is the radius of the pulley (half of its diameter).
Given the diameter of the pulley is 3.0 m, the radius is:
r = 3.0 m / 2 = 1.5 m
Substituting the values into the equation:
9.44 m/s = 2π(1.5 m)ω
To solve for ω, divide both sides by 2π(1.5 m):
ω = 9.44 m/s / (2π(1.5 m))
ω ≈ 1.99 rad/s
Therefore, the pulley must rotate at a speed of approximately 1.99 radians per second for the cable car to make the trip in 12 minutes.
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Two squares of wire like that in the previous question are placed side by side on a table with a distance of 3 cm between the closest sides of the two squares. A 15 mA current passes counterclockwise through both squares. What is the resulting force between the two squares? Is it attractive or repulsive?
Answers
The total magnetic field at the center point between the two squares is \(2 *10^{(-4)}\) Tesla.
Let's assume the current passing through each square of wire is I = 15 mA = \(15 *10^{(-3)} A\).
The magnetic field produced by a square wire at its center can be calculated using the formula for the magnetic field of a long straight wire:
B = (μ₀ * I) / (2 * π * r)
Where:
B is the magnetic field
μ₀ is the permeability of free space\((4\pi × 10^{(-7)} T.m/A)\)
I is the current
r is the distance from the wire
For each square wire, the distance from its center to the center point between the two squares is 1.5 cm = 0.015 m.
Calculating the magnetic field produced by each square wire:
B1 =\((4\pi * 10^{(-7)} T.m/A * 15 * 10^{(-3)} A) / (2 *\pi * 0.015 m)\)
B1 =\(10^{(-4)} T\)
Since the current passes through both squares in a counterclockwise direction, the magnetic fields produced by both squares will have the same magnitude and direction.
Therefore, the total magnetic field at the center point between the two squares is:
B_total = B1 + B1
B_total =\(2 * 10^{(-4)} T\)
B_total = \(2 *10^{(-4)} T\)
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--The complete Question is, Two squares of wire, each with a side length of 4 cm, are placed side by side on a table with a distance of 3 cm between the closest sides of the two squares. A 15 mA current passes counterclockwise through both squares. What is the total magnetic field at the center point between the two squares?--
A type of elevator called a cage is used to raise and lower miners in a mine
shaft. Suppose the cage carries a group of miners down the shaft. If the
unbalanced force on the cage is 60.0 N, and the mass of the loaded cage is
1.50 x 10²kg, what is the acceleration of the cage?
Answers
Answer:
Acceleration, a = 0.04 m/s²
Explanation:
Given the following data;
Force = 60N
Mass = 1500kg
Force is given by the multiplication of mass and acceleration.
Mathematically, Force is;
\( F = ma\)
Where;
F represents force.
m represents the mass of an object.
a represents acceleration.
Making acceleration (a) the subject, we have;
\(Acceleration (a) = \frac{F}{m}\)
Substituting into the equation;
\(Acceleration (a) = \frac{60}{1500}\)
Acceleration, a = 0.04 m/s²
a resistor and inductor are connected to a 9.0 v battery by a switch as shown. the moment the switch is closed, current flows through the circuit. the resistor has a resistance of r
Answers
The resistance of the resistor r so maximum current is 40.9 mA.
A Resistor and inductor are connected to a 9.0 v battery by a switch as shown. the moment the switch is closed, current flows through the circuit. the resistor has a resistance of r.
Calculation:-
Maximum current imax = V/R
= 9/220
= 40.9 mA.
Resistors are used for many purposes. a few examples consist of restricting electric powered cutting-edge, voltage division, warmth generation, matching and loading circuits, benefit manage, and setting time constants. they may be commercially available with resistance values over various extra than nine orders of magnitude.
A circuit is a entire circular direction that energy flows via. A easy circuit includes a modern supply, conductors and a load. The time period circuit may be utilized in a preferred sense to consult any fixed route that energy, records or a sign can travel via.
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Can an object with acceleration of zero be in motion?
Answers
Answer:
NO
Explanation:
if it has no acceleration then it's not moving
Answer:
Yes when the velocity is constant then the acceleration is said to be zero. Thus an object with 0 acceleration can be in motion.
Let me give you an example to make you more clear
Example:
When a car is traveling at a constant 90 km/h in a straight line has nonzero velocity and zero acceleration.
A stationary siren creates an 894 Hz
sound. When a motorcyclist is driving
toward it, she hears a 926 Hz sound
How fast is she driving?
(Speed of sound = 343 m/s)
(Unit = m/s)
Answers
Answer:
12.3 m/s
Explanation:
The Doppler equation describes how sound frequency depends on relative velocities:
fr = fs (c + vr)/(c + vs),
where fr is the frequency heard by the receiver,
fs is the frequency emitted at the source,
c is the speed of sound,
vr is the velocity of the receiver,
and vs is the velocity of the source.
Note: vr is positive if the receiver is moving towards the source, negative if away.
Conversely, vs is positive if the receiver is moving away from the source, and negative if towards.
Given:
fs = 894 Hz
fr = 926 Hz
c = 343 m/s
vs = 0 m/s
Find: vr
926 = 894 (343 + vr) / (343 + 0)
vr = 12.3
The speed of the car is 12.3 m/s.
A boat travels at a constant speed of 12.0m/s for 97s. How far does it go?
Answers
Answer:
your mama
Explanation:
because i said so
Answer:
1164m
Explanation:
speed=distance/time, therefore Distance=speed*time.
Now that we have our equation, we plug in the variables, as we do not need to convert our units.
12*97= 1164 m
GIVING BRAINLIEST PLEASE HELP ME!!!
-If you answer correctly ill give you brainliest which will give you 30 points-
(SHOW WORK if you want brainliest!)
Answers
You swing a 3.00 kg stone in a circle, using the full length of a thin 75.0cm rope. At what speed should you swing it so its acceleration will be 9.8 m/s^2? m/s
Answers
To achieve an acceleration of 9.8 m/s², you should swing the 3.00 kg stone at a speed of approximately 2.71 m/s.
The centripetal acceleration formula, a = (v² / r), relates the acceleration (a) to the velocity (v) and the radius (r) of the circular path. Rearranging the formula to solve for v gives v = sqrt(a * r). In this case, the acceleration is given as 9.8 m/s² and the radius is half the length of the rope, which is 0.75 m. Substituting these values into the formula, we get v = sqrt(9.8 m/s² * 0.75 m) ≈ 2.71 m/s. Therefore, to achieve an acceleration of 9.8 m/s², you should swing the stone at a speed of approximately 2.71 m/s.
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