AC Generator and Transformer NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

AC Generator and Transformer MCQ Questions


13.
Which loss occurs in the core of a transformer due to alternating magnetic flux?
A.
Eddy current loss
B.
Hysteresis loss
C.
Copper loss
D.
Mechanical loss
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ANSWER :
A. Eddy current loss
14.
The turn ratio of a transformer determines:
A.
Ratio of input and output power
B.
Ratio of primary turns to secondary turns
C.
Ratio of secondary voltage to primary voltage
D.
Ratio of input current to output current
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ANSWER :
B. Ratio of primary turns to secondary turns
15.
In a step-down transformer, the number of turns in the secondary coil is

NEET - 2020

A.
Equal to the primary coil
B.
Less than the primary coil
C.
More than the primary coil
D.
Zero
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ANSWER :
B. Less than the primary coil
16.
If the number of turns in the secondary coil is greater than the primary coil, the transformer is:
A.
A step-up transformer
B.
A step-down transformer
C.
An isolation transformer
D.
A voltage stabilizer
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ANSWER :
A. A step-up transformer
17.
A step-down transformer reduces:
A.
Voltage and power
B.
Current and resistance
C.
Frequency of AC
D.
Both voltage and current
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ANSWER :
A. Voltage and power
18.
Which type of core is used in transformers to reduce energy loss?
A.
Iron core
B.
Air core
C.
Silicon steel core
D.
Plastic core
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ANSWER :
D. Plastic core