CBSE Class 12 Electromagnetic Induction Multiple Choice Questions with Answers. MCQ Questions Class 12 Electromagnetic Induction with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Electromagnetic Induction MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Electromagnetic Induction with Answers - Set - 1
Question 1:
When the current through a solenoid increases at a constant rate, the induced current:
(a) is a constant and is in the direction of inducing current.
(b) is a constant and is opposite to the direction of the inducing current.
(c) increases with time and is in the direction of the inducing current.
(d) increases with time and is opposite to the direction of the inducing current.
Correct Answer – (B)
Question 2 :
Eddy currents produced in a conductor are responsible for:
(a) damping
(b) loss of energy
(c) heating
(d) All of the above
Correct Answer – (D)
Question 3 :
(a) in a circuit due to variation in its own current.
(b) in a circuit due to variation of current in the neighbouring circuit.
(c) in a coil due to the motion of the magnet near it.
(d) across the ends of a wire moving in a magnetic field.
Correct Answer – (D)
Question 4 :
The electric current in a circuit varies from + 2A to – 2A in a time 10-2 s. Another coil of resistance 20 Ω and inductance 2H is placed hear it. What will be the induced current in the second coil?
(a) 4A
(b) 8A
(c) 20A
(d) 40A
Correct Answer – (D)
Question 5 :
Which of the following gives the direction of the induced e.m.f.?
(a) Faraday’s law
(b) Lenz’s law
(c) Ampere
(d) Biot-Savart’s law.
Correct Answer – (B)
MCQ Questions Class 12 Electromagnetic Induction with Answers
Question 6 :
A car moves up on a plane road. The induced e.m.f. in the axle connecting the two wheels is maximum, when it moves:
(a) At the poles
(b) At equator
(c) remains stationary
(d) No e.m.f. is induced at all.
Correct Answer – (A)
Question 7 :
Whaf voltage is developed across the axle of the wheels of a train, when it moves with a speed of 72 kmh-1? The horizontal component of earth’s magnetic field is 0.40 × 10-4 T and the angle of dip is 30°. The length of the axle is 1.5 m.
(a) 0.8 mv
(b) 0.4 mv
(c) 0.2 mv
(d) 0.7 mv
Correct Answer – (D)
Question 8 :
Which of the following instrument do not make use of eddy currents?
(a) Electrical brakes
(b) Dead beat galvanometer
(c) inductor motor
(d) Transformer.
Correct Answer – (D)
Question 9 :
Which of the following is based on the law of conservation of energy?
(a) Faraday’s law
(b) Lenz’s law
(c) Ampere
(d) Biot-Savart’s law.
Correct Answer – (B)
Question 10 :
A circular coil is placed near a straight conductor as shown below. When the current in the straight conductor increases, the current in the coil is
(a) clockwise
(b) anticlockwise
(c) normal to the plane oi coil
(d) None of them.
Correct Answer – (A)
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