Properties of a Magnet NDA Questions

NDA Physics

Properties of a Magnet MCQ Questions


7.
The radius of curvature of the path of a charged particle in a uniform magnetic field is directly proportional to the
A.
Charge on the particle
B.
Momentum of the particle
C.
Energy of the particle
D.
Strength of the field
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ANSWER :
B. Momentum of the particle
8.
What type of materials are attracted to magnets?
A.
Ferromagnetic
B.
Diamagnetic
C.
Paramagnetic
D.
Non-magnetic
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ANSWER :
A. Ferromagnetic
9.
Which of the following is a natural magnet?
A.
Magnetite
B.
Copper
C.
Steel
D.
Nickel
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ANSWER :
A. Magnetite
10.
In which direction do magnetic field lines around a bar magnet flow outside the magnet?
A.
From North to South
B.
From South to North
C.
Randomly
D.
Parallel to each other
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ANSWER :
A. From North to South
11.
What is the effect of heating on a magnet?
A.
It strengthens the magnet
B.
It demagnetizes the magnet
C.
It has no effect
D.
It changes the polarity
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ANSWER :
B. It demagnetizes the magnet
12.
Which material is known for having high magnetic permeability?
A.
Air
B.
Wood
C.
Iron
D.
Plastic
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ANSWER :
C. Iron