Electrical Engineering Multiple Choice – Electromagnetic Induction MCQs Part 3

Contents

- 1 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
- 2 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
- 3 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
- 4 The direction of induced EMF can be found using which law/rule
- 5 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

**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

- 26 mH
- 56 mH
- 6 mH
- 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

- 15 V
- 20 V
- 25 V
- 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

- 120 N
- 240 N
- 360 N
- 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

- Fleming’s right hand rule
- Kirchhoff s voltage law
- Laplace’s law
- 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

- 12 H
- 24 H
- 4 H
- 8 H

Correct answer: 1. 12 H