Electromagnetic Induction MCQs Part 3

Electrical Engineering Multiple Choice – Electromagnetic Induction MCQs Part 3

The self inductances of two coils are 8 mH and 18 mH respectively. If value of coefficient of coupling is 0.5, the mutual inductance of coils is

The self inductances of two coils are 8 mH and 18 mH respectively. If value of coefficient of coupling is 0.5, the mutual inductance of coils is

  1. 26 mH
  2. 56 mH
  3. 6 mH
  4. 8 mH

Correct answer: 3. 6 mH

A conductor having 2 meters length moves at right angle to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced EMF in the conductor will be

A conductor having 2 meters length moves at right angle to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced EMF in the conductor will be

  1. 15 V
  2. 20 V
  3. 25 V
  4. 50 V

Correct answer: 3. 25 V

An electrical conductor carries 125 amps of current under 60° to a magnetic field of 1.1 tesla. The approximate force on the conductor will be

An electrical conductor carries 125 amps of current under 60° to a magnetic field of 1.1 tesla. The approximate force on the conductor will be

  1. 120 N
  2. 240 N
  3. 360 N
  4. 520 N

Correct answer: 1. 120 N

The direction of induced EMF can be found using which law/rule

The direction of induced EMF can be found using which law/rule

  1. Fleming’s right hand rule
  2. Kirchhoff s voltage law
  3. Laplace’s law
  4. Lenz’s law

Correct answer: 4. Lenz’s law

Two coils having self-inductances of 10 H and 2 H, the mutual inductance being zero. If two coils are connected in series, total inductance will be

Two coils having self-inductances of 10 H and 2 H, the mutual inductance being zero. If two coils are connected in series, total inductance will be

  1. 12 H
  2. 24 H
  3. 4 H
  4. 8 H

Correct answer: 1. 12 H

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