Force and Pressure UPSC Questions

Physics

Force and Pressure MCQ Questions


7.
Which of the following is proper example(s) to explain that force on an object may change its shape
A.
A ball of dough rolled into chapati
B.
Pressing a rubber ball kept on table
C.
Making toy models using clay
D.
All the above
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ANSWER :
D. All the above
8.
The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?
UPSC - 2013
A.
Gravity is the strongest of the four
B.
Electromagnetism acts only on particles with an electric charge
C.
Weak nuclear force causes radioactivity
D.
Strong nuclear force holds protons and neutrons inside the nucleus of an atom
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ANSWER :
A. Gravity is the strongest of the four
9.
The force exerted by the earth to pull the object towards itself is called
A.
Contact force
B.
Electrostatic force
C.
Gravitational force
D.
Muscular force
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ANSWER :
C. Gravitational force
10.
The SI unit of force is
A.
Ampere
B.
Newton
C.
Diopter
D.
Candela
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ANSWER :
B. Newton
11.
Force changes the
A.
Motion of body
B.
Speed of body
C.
Shape of body
D.
All the above
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ANSWER :
D. All the above
12.
Which of the following forces is a contact force?
A.
Gravitational force
B.
Magnetic force
C.
Electrostatic force
D.
Friction
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ANSWER :
D. Friction