Eddy Currents, Self and Mutual Inductance NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

Eddy Currents, Self and Mutual Inductance MCQ Questions


1.
Eddy currents are induced in a conductor when it is subjected to:
A.
A steady magnetic field
B.
A changing magnetic field
C.
An electric field
D.
A constant electric current
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ANSWER :
B. A changing magnetic field
2.
Which of the following is NOT an application of eddy currents?
A.
Induction heating
B.
Electromagnetic braking
C.
Transformers
D.
Lenz’s law
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ANSWER :
D. Lenz’s law
3.
The magnitude of eddy currents can be reduced by:
A.
Using thick conductors
B.
Increasing the resistance of the conductor
C.
Decreasing the resistance of the conductor
D.
Using laminated core
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ANSWER :
D. Using laminated core
4.
Which material is commonly used to reduce eddy currents in transformers?
A.
Copper
B.
Aluminium
C.
Soft iron
D.
Plastic
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ANSWER :
C. Soft iron
5.
Self-inductance of a coil depends on:
A.
Current flowing through it
B.
Number of turns and core material
C.
Shape of the coil
D.
All of the above
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ANSWER :
D. All of the above
6.
Mutual inductance between two coils is maximum when:
A.
They are perpendicular to each other
B.
They are close to each other
C.
They are far apart
D.
They are wound on the same core
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ANSWER :
D. They are wound on the same core