Tricky Electromagnetic Induction Multiple choice Questions and Answers pdf

41. A crack in the magnetic path of an inductor will result in
(a) unchanged inductance
(b) increased inductance
(c) zero inductance
(d) reduced inductance
Ans: d

42. 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

43. A moving magnetic field will produce the same effect as a conductor that is moving.
(a) Yes
(b) No
Ans:

44. The polarity of the induced voltage can be determined by using the left-hand generator rule.
(a) Yes
(b) No
Ans: a

45. Increasing the field or increasing the current will decrease the force on the conductor.
(a) Yes
(b) No
Ans: b

46. Reversing the field or the current will reverse the force on the conductor.
(a) Yes
(b) No
Ans: a

47. When a conductor moves in the field, so that it makes an angle 8 with the lines of flux, the force F is given as : F = Bl sin2 0.
(a) Yes
(b) No
Ans: b

48. The self-inductance of the coil may be defined as equal to the e.m.f. induced in volts when the current in the circuit changes at the rate of unit weber turns.
(a) Yes
(b) No
Ans: b

Read More Questions:
Electromagnetic Induction Part1
Electromagnetic Induction Part2
Electromagnetic Induction Part3
Electromagnetic Induction Part4
Electromagnetic Induction Part5