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azamat
3 years ago
10

Interactive Solution 22.61 offers one approach to problems such as this one. The secondary coil of a step-up transformer provide

s the voltage that operates an electrostatic air filter. The turns ratio of the transformer is 45:1. The primary coil is plugged into a standard 120-V outlet. The current in the secondary coil is 2.0 x 10-3 A. Find the power consumed by the air filter.
Physics
1 answer:
vichka [17]3 years ago
8 0

Answer:

The power consumed by air filter is 10.8W

Explanation:

Voltage V=120 V

Current I=2.0×10⁻³A

Turn ration of transformer=45:1

To find

The power consumed by the air filter

Solution

The power used by filter is

P=I_{p}V_{p}\\Solving \\\frac{I_{s}}{I_{p}}=\frac{N_{p}}{N_{s}}\\  shows\\I_{p}=I_{s}(\frac{N_{s}}{N_{p}})

Substituting this result for power

P=I_{p}V_{p}\\P=I_{s}(\frac{N_{s}}{N_{p}})V_{p}\\P=(2.0*10^{-3}A)(\frac{45}{1} )(120V)\\P=10.8W

The power consumed by air filter is 10.8W

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Answer:

2.4 m

Explanation:

Consider the motion along the vertical direction

y_{o} = initial position of ball above the ground = 4.5 m

t = time taken by the ball to hit the smokestack = 0.65 s

v_{oy} = initial velocity of the ball along vertical direction

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y = position of ball at the time of hitting the smokestack

Using the kinematics equation

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inserting the above values

y = 4.5 + (0) (0.65) + (0.5) (- 9.8) (0.65)^{2} \\y = 2.4 m

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An ideal ammeter would have zero resistance while an ideal voltmeter would have infinite resistance, why?.
Dafna1 [17]

Answer: An ideal ammeter would have zero resistance, because to ensure that, there is no voltage drop due to the internal resistance. Similarly, an ideal voltmeter would have infinite resistance, because to ensure that there is no current is drawn by the voltmeter.

Explanation: To find the answer, we need to know about the Ammeter and Voltmeter.

<h3>What is an ammeter?</h3>
  • An ammeter is a device, that can be used to measure the electric current flows through a circuit in amperes.
  • An ideal ammeter would have zero resistance, because to ensure that, there is no voltage drop due to the internal resistance when it is connected in series to measure the current.
<h3>What is voltmeter?</h3>
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  • An ideal voltmeter would have infinite resistance, because to ensure that there is no current is drawn by the voltmeter, when it is connected in parallel to measure the voltage.

Thus, we can conclude that, an ideal ammeter would have zero resistance, because to ensure that, there is no voltage drop due to the internal resistance. Similarly, an ideal voltmeter would have infinite resistance, because to ensure that there is no current is drawn by the voltmeter.

Learn more about the ammeter and voltmeter here:

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Answer:

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the applicable formula is

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if we rearrange the equation and substitute the values given above,

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