AC Generator and Transformer NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

AC Generator and Transformer MCQ Questions


13.
The frequency of AC produced by a generator depends on:
A.
Area of coil
B.
Number of turns in coil
C.
Speed of rotation of the coil
D.
Strength of magnetic field
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ANSWER :
C. Speed of rotation of the coil
14.
If a generator coil rotates at N revolutions per second, the frequency of generated AC is:
A.
2N Hz
B.
N/ฯ€ Hz
C.
N/2 Hz
D.
N Hz
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ANSWER :
D. N Hz
15.
What is the standard AC frequency in India?
A.
25 Hz
B.
50 Hz
C.
100 Hz
D.
60 Hz
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ANSWER :
B. 50 Hz
16.
What is the standard AC frequency in USA?
A.
50 Hz
B.
120 Hz
C.
100 Hz
D.
60 Hz
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ANSWER :
D. 60 Hz
17.
In an AC generator, the role of the armature is:
A.
To act as the rotating coil that generates emf
B.
To increase resistance
C.
To rectify the AC
D.
To produce magnetic field
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ANSWER :
A. To act as the rotating coil that generates emf
18.
Modern large AC generators typically have:
A.
Stationary magnets with rotating coils
B.
Both coils and magnets rotating
C.
Stationary coils with rotating magnets
D.
Both coils and magnets stationary
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ANSWER :
C. Stationary coils with rotating magnets