Induced EMF and Current NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

Induced EMF and Current MCQ Questions


13.
If the number of turns per unit length of a solenoid is doubled, its self-inductance becomes:
A.
Four times
B.
Eight times
C.
Same
D.
Doubled
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ANSWER :
A. Four times
14.
When a conducting loop is placed in a changing magnetic field, an induced current is produced. This phenomenon is explained by:
A.
Lenz's Law
B.
Coulomb's Law
C.
Ohm's Law
D.
Faraday's Law
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ANSWER :
D. Faraday's Law
15.
Which law determines the direction of induced current?

NEET - 2016

A.
Coulomb’s law
B.
Ohm’s law
C.
Lenz’s law
D.
Faraday’s second law
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ANSWER :
C. Lenz’s law
16.
Eddy currents are produced in a bulk piece of conducting material when it is subjected to:
A.
A changing electric field
B.
A changing magnetic field
C.
A uniform magnetic field
D.
A uniform electric field
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ANSWER :
B. A changing magnetic field
17.
What happens to the induced EMF if the rate of change of magnetic flux is doubled?
A.
Doubles
B.
Remains same
C.
Halves
D.
Becomes zero
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ANSWER :
A. Doubles
18.
Lenz's Law is a consequence of which fundamental law of physics?
A.
Law of Conservation of Energy
B.
Newton’s Third Law
C.
Law of Conservation of Momentum
D.
Law of Conservation of Charge
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ANSWER :
A. Law of Conservation of Energy