# Electromagnetic Induction MCQ Part 2

## Electromagnetic Induction MCQ Part 2 Category –EE Online Test

Attempt Free Electromagnetic Induction MCQ Part 2 Here. Read The Important Electrical MCQ From Below.

Q1. The self inductance’s of two coils are 8 mH and 18 mH If the co-efficient s of coupling is 0.5, the mutual inductance of the coils is

A.  4 mH
B.  5 mH
C.  6 mH
D.  12 mH

Ans. C

Q2. A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change
of 0.06 Wb occur to produce such a voltage?

A.  0.01 s
B.  0.1 s
C.  0.5 s
D.  5 s

Ans. C

Electromagnetic Induction MCQ Part 2

Q3. A coil is wound on iron core which carries current I. The self induced voltage in the coil is not affected by

A.  variation in coil current
B.  variation in voltage to the coil
C.  change of number of turns of coil
D.  the resistance of magnetic path

Ans. B

Q4. An open coil has

A.  zero resistance and inductance
B.  infinite resistance and zero inductance
C.  infinite resistance and normal inductance
D.  zero resistance and high inductance

Ans. B

Electromagnetic Induction MCQ Part 2

Q5. The law that the induced e.m.f. and current always oppose the cause producing them is due to

B.  Lenz
C.  Newton
D.  Coulomb

Ans. B

Q6. Two coils have inductances of 8 mH and 18 mH and a co-efficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be

A.  32 mH
B.  27 mH
C.  40 mH
D.  48 mH

Ans. B

Electromagnetic Induction MCQ Part 2

Q7. Which of the following inductor will have the least eddy current losses?

A.  Air core
B.  Laminated iron core
C.  Iron core
D.  Powdered iron core

Ans. A

Q8. Which of the following statements is correct ?

A.  The inductance of the coil carrying a constant D.C. current will change the current into pulses
B.  The inductance of the coil carrying a constant D.C. current will increase the current
C.  The inductance of the coil carrying a constant D.C. current will not affect the current
D.  The inductance of the coil carrying a constant D.C. current will decrease the current

Ans. C

Electromagnetic Induction MCQ Part 2

Q9. Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be

A.  unaffected
B.  doubled
C.  halved

Ans. B

Q10. Which of the following is not a unit of inductance?

A.  Henry
B.  Coulomb/volt ampere
C.  Volt second per ampere
D.  All of the above

Ans. B

Electromagnetic Induction MCQ Part 2