Electromagnetic Induction MCQ Questions & Answers | Electrical Engineering Page-3 section-1

21.
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

Answer & Solution Discuss in Board Save for Later

22.
Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla

A. 100 N

B. 400 N

C. 600 N

D. 1000 N

Answer & Solution Discuss in Board Save for Later

23.
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

D. Quadrupled

Answer & Solution Discuss in Board Save for Later

24.
The polarity of the induced voltage can be determined by using the left-hand generator rule.

A. Yes

B. No

Answer & Solution Discuss in Board Save for Later

25.
A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be

A. 10 V

B. 15 V

C. 25 V

D. 50 V

Answer & Solution Discuss in Board Save for Later

26.
If current in a conductor increases then according to Lenz's law self-induced voltage will

A. Aid the increasing current

B. Tend to decrease the amount of current

C. Produce current opposite to the increasing current

D. Aid the applied voltage

Answer & Solution Discuss in Board Save for Later

27.
Two coils have inductances of 8 mH and 18 mH and a coefficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be

A. 32 mH

B. 38 mH

C. 40 mH

D. 48 mH

Answer & Solution Discuss in Board Save for Later

28.
Two coils have self-inductances of 10 H and 2 H, the mutual inductance being zero. If the two coils are connected in series, the total inductance will be

A. 6 H

B. 8 H

C. 12 H

D. 24 H

Answer & Solution Discuss in Board Save for Later

29.
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

Answer & Solution Discuss in Board Save for Later

30.
Mutually inductance between two magnetically coupled coils depends on

A. Permeability of the core

B. The number of their turns

C. Cross-sectional area of their common core

D. All of the above

Answer & Solution Discuss in Board Save for Later

Electromagnetic Induction MCQ Questions & Answers | Electrical Engineering

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

Answer & Solution

22. Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla

Answer & Solution

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

Answer & Solution

24. The polarity of the induced voltage can be determined by using the left-hand generator rule.

Answer & Solution

25. A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be

Answer & Solution

26. If current in a conductor increases then according to Lenz's law self-induced voltage will

Answer & Solution

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

Answer & Solution

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

Answer & Solution

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

Answer & Solution

30. Mutually inductance between two magnetically coupled coils depends on

Answer & Solution

21.
Which of the following inductor will have the least eddy current losses?

22.
Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla

23.
Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be

24.
The polarity of the induced voltage can be determined by using the left-hand generator rule.

25.
A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be

26.
If current in a conductor increases then according to Lenz's law self-induced voltage will

27.
Two coils have inductances of 8 mH and 18 mH and a coefficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be

28.
Two coils have self-inductances of 10 H and 2 H, the mutual inductance being zero. If the two coils are connected in series, the total inductance will be

29.
A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by

30.
Mutually inductance between two magnetically coupled coils depends on