Electromagnetic Induction MCQs Part 1

Electrical Engineering Multiple Choice – Electromagnetic Induction MCQs Part 1

The inductive reactance a coil having negligible resistance and having 50 volts across it with 10 mA current will be

The inductive reactance a coil having negligible resistance and having 50 volts across it with 10 mA current will be

1. 10 ohms
2. 50 ohms
3. 500 ohms
4. 5000 ohms

Correct answer: 4. 5000 ohms

Mutual inductance between two magnetically coupled coils depends on

Mutual inductance between two magnetically coupled coils depends on

1. All of the above
2. Cross-sectional area of their common core
3. Permeability of the core
4. The number of their turns

Correct answer: 1. All of the above

In an iron core coil iron core is removed so that the coil becomes an air cored coil. The inductance of coil will

In an iron core coil iron core is removed so that the coil becomes an air cored coil. The inductance of coil will

1. Decrease
2. Increase
3. Initially increase and then decrease
4. Remain the same

Correct answer: 1. Decrease

Higher the self-inductance of a coil

Higher the self-inductance of a coil

1. Greater the flux produced by it
2. Lesser its weber-turns
3. Longer the delay in establishing steady current through it
4. Lower the EMF induced

Correct answer: 3. Longer the delay in establishing steady current through it

Which of following is a unit of inductance

Which of following is a unit of inductance

1. Ampere turns
2. Henry
3. Ohm
4. Weber/metre

Correct answer: 2. Henry