Properties of a Magnet NDA Questions

NDA Physics

Properties of a Magnet MCQ Questions


13.
What happens to a magnetic material placed in a strong magnetic field?
A.
It becomes demagnetized
B.
It becomes magnetized
C.
It remains unaffected
D.
It melts
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ANSWER :
B. It becomes magnetized
14.
What is the unit of magnetic flux?
A.
Tesla
B.
Weber
C.
Henry
D.
Joule
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ANSWER :
B. Weber
15.
Which device uses magnets to convert mechanical energy into electrical energy?
A.
Transformer
B.
Motor
C.
Generator
D.
Resistor
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ANSWER :
C. Generator
16.
What instrument is commonly used to detect the presence of a magnetic field?
A.
Galvanometer
B.
Ammeter
C.
Voltmeter
D.
Compass
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ANSWER :
D. Compass
17.
Which of the following is true about the magnetic field lines?
A.
They intersect each other
B.
They form closed loops
C.
They are parallel to each other
D.
They diverge from North pole only
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ANSWER :
B. They form closed loops
18.
What is the region around a magnet where magnetic force is exerted called?
A.
Magnetic domain
B.
Magnetic field
C.
Magnetic pole
D.
Magnetic flux
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ANSWER :
B. Magnetic field