Electromagnetic Induction MCQs

Q. The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as

  1. Self-inductance
  2. Mutual inductance
  3. Series aiding inductance
  4. Capacitance
Answer
(a)

Q. Which circuit element(s) will oppose the change in circuit current?

  1. Resistance only
  2. Inductance only
  3. Capacitance only
  4. Inductance and capacitance
Answer
(b)

Q. Which of the following circuit elements will oppose the change in circuit current?

  1. Capacitance
  2. Inductance
  3. Resistance
  4. All of the above
Answer
(b)

Q. In case all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be

  1. 2.0
  2. 1.0
  3. 0.5
  4. Zero
Answer
(b)

Q. Two 300 μH coils in series without mutual coupling have a total inductance of

  1. 300 μH
  2. 600 μH
  3. 150 μH
  4. 75 μH
Answer
(b)
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