Eddy Currents, Self and Mutual Inductance NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

Eddy Currents, Self and Mutual Inductance MCQ Questions


13.
Self-inductance of a coil depends on:
A.
Only its material
B.
Only its shape
C.
Only its current
D.
Its material and shape
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ANSWER :
D. Its material and shape
14.
The coefficient of mutual inductance between two coils depends on:
A.
The current flowing through them
B.
The number of turns in coils
C.
The separation between them
D.
All of the above
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ANSWER :
D. All of the above
15.
In a transformer, mutual inductance is responsible for:
A.
Energy transfer
B.
Heat generation
C.
Voltage amplification
D.
None of the above
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ANSWER :
B. Heat generation
16.
Which of the following is NOT an effect of eddy currents?
A.
Electromagnetic damping
B.
Joule heating
C.
Electromagnetic propulsion
D.
Superconductivity
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ANSWER :
D. Superconductivity
17.
A solenoid with a large number of turns will have:
A.
Low inductance
B.
High inductance
C.
Zero inductance
D.
Infinite inductance
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ANSWER :
B. High inductance
18.
The energy stored in an inductor is given by:
A.
LI
B.
LI^2
C.
0.5 LI^2
D.
L^2/I
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ANSWER :
C. 0.5 LI^2