Lenz’s Law NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

Lenz’s Law MCQ Questions


1.
Lenz's law was first formulated by:
A.
Joseph Henry in 1830
B.
Heinrich Friedrich Lenz in 1834
C.
Michael Faraday in 1831
D.
James Clerk Maxwell in 1865
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ANSWER :
B. Heinrich Friedrich Lenz in 1834
2.
The statement of Lenz's law is:
A.
Induced emf is always positive
B.
Induced current opposes the cause that produces it
C.
Induced emf equals the rate of change of magnetic flux
D.
Induced current is proportional to applied field
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ANSWER :
B. Induced current opposes the cause that produces it
3.
Lenz's law is in accordance with the law of conservation of:
A.
Mass
B.
Charge
C.
Momentum
D.
Energy
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ANSWER :
D. Energy
4.
In Faraday's law ε = -dΦ/dt, the negative sign represents:
A.
Ampere's law
B.
Faraday's law itself
C.
Ohm's law
D.
Lenz's law
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ANSWER :
D. Lenz's law
5.
If Lenz's law were violated in nature, it would lead to:
A.
Violation of Newton's third law
B.
Violation of charge conservation
C.
Violation of Coulomb's law
D.
A perpetual motion machine
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ANSWER :
D. A perpetual motion machine
6.
When the north pole of a bar magnet is pushed towards a closed coil, the face of the coil facing the magnet behaves as:
A.
South pole
B.
North pole
C.
No pole
D.
Alternating poles
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ANSWER :
B. North pole