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Electromagnetism

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Question 27

An aerospace power-distribution transformer is connected to a primary AC voltage of 48 V at a frequency of 400 Hz. The output voltage from the secondary coil is 240 V. The primary coil of the transformer consists of 150 turns150\text{ turns}150 turns.

a.

State Faraday's law of electromagnetic induction.

[2]
b.

Calculate the number of turns on the secondary coil.

[2]
c.

At one particular instant during operation, the output voltage across the secondary coil is measured to be 180 V. Calculate the change in magnetic flux through the secondary coil over a brief time interval of 1.5 ms, assuming the voltage remains constant at this value during the interval, and state the unit of magnetic flux.

[4]

Electromagnetism Questions

  1. A Level
  2. /Physics
  3. /Electromagnetism