Question:

In an ideal transformer, the voltage and the current in the primary are 200 V, 2A and that in the secondary are 2000 V, I A. The value of I is (A)

Updated On: Apr 13, 2024
  • 0.2
  • 1
  • 20
  • 2
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The Correct Option is A

Solution and Explanation

Using $\frac{V_p}{V_s} = \frac{I_p}{I_s} $ we get $\frac{200}{2000} = \frac{I}{2} \, i.e.$ I = 0.2 A.
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Top Questions on Electromagnetic induction

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Concepts Used:

Electromagnetic Induction

Electromagnetic Induction is a current produced by the voltage production due to a changing magnetic field. This happens in one of the two conditions:-

  1. When we place the conductor in a changing magnetic field.
  2. When the conductor constantly moves in a stationary field.

Formula:

The electromagnetic induction is mathematically represented as:-

e=N × d∅.dt

Where

  • e = induced voltage
  • N = number of turns in the coil
  • Φ = Magnetic flux (This is the amount of magnetic field present on the surface)
  • t = time

Applications of Electromagnetic Induction

  1. Electromagnetic induction in AC generator
  2. Electrical Transformers
  3. Magnetic Flow Meter