Natural and Artificial Magnets NDA Questions

NDA Physics

Natural and Artificial Magnets MCQ Questions


1.
What is a natural magnet?
A.
A magnet created by humans
B.
A magnet found in nature
C.
A temporary magnet
D.
An electromagnet
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ANSWER :
B. A magnet found in nature
2.
Which of the following is a natural magnet?
A.
Iron nail
B.
Lodestone
C.
Steel bar
D.
Copper wire
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ANSWER :
B. Lodestone
3.
What is the main characteristic of a natural magnet?
A.
It loses its magnetism quickly
B.
It attracts only iron
C.
It remains magnetized permanently
D.
It can be easily demagnetized
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ANSWER :
C. It remains magnetized permanently
4.
Which of the following is an artificial magnet?
A.
Lodestone
B.
Alnico
C.
Magnetite
D.
Pyrrhotite
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ANSWER :
B. Alnico
5.
Which of the following magnets can be turned on and off?
A.
Bar magnet
B.
Electromagnet
C.
Lodestone
D.
Neodymium magnet
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ANSWER :
B. Electromagnet
6.
What does the term "magnetization" refer to?
A.
Heating a magnet
B.
Cooling a magnet
C.
The process of making a material magnetic
D.
The process of making a magnet non-magnetic
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ANSWER :
C. The process of making a material magnetic