Induced EMF and Current NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

Induced EMF and Current MCQ Questions


1.
Which rule is used to determine the direction of current induced in a conductor moving through a magnetic field?
A.
Ampere’s Rule
B.
Fleming’s Left-Hand Rule
C.
Fleming’s Right-Hand Rule
D.
None of the above
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ANSWER :
C. Fleming’s Right-Hand Rule
2.
How can the energy stored in an inductor be increased by four times?
A.
By doubling the current
B.
This is not possible
C.
By doubling the inductance
D.
By making current √2 times
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ANSWER :
A. By doubling the current
3.
If the number of turns in a coil is doubled, the induced emf will

NEET - 2017

A.
Remain the same
B.
Be doubled
C.
Be halved
D.
Be four times
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ANSWER :
B. Be doubled
4.
Which of the following is a unit of magnetic flux?
A.
Maxwell
B.
Gauss
C.
Tesla
D.
Ampere
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ANSWER :
A. Maxwell
5.
An induced emf of 5 V is produced in a coil when the magnetic flux changes from 0.1 Wb to 0.5 Wb in 0.2 seconds. The number of turns in the coil is

NEET - 2022

A.
10
B.
15
C.
25
D.
20
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ANSWER :
D. 20
6.
The device used to produce electric current is known as:
A.
Motor
B.
Generator
C.
Ammeter
D.
Galvanometer
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ANSWER :
B. Generator