11th Physics Chapter 4 MCQs
11th Physics Chapter 4 MCQs. Federal board notes physics class 11th.
Tick the correct option.
1) The term ” centrifugation ” means separation:
A) through spinning
B) of components at higher temperature
C) through evaporation
D) of components at lower temperature
Correct option is (a)
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2) A car turns around a curve at
$$30\;km\;h^{-1}$$. If it turns at double the speed, the tendency to overturn is:
A) doubled
B) quadrupled
C) halved
D) unchanged
Correct option is (b)
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3) The moment of inertia of a spinning body about a certain axis, doesn’t depend on:
A) distribution of mass around the axis
B) orientation of the axis
C) mass of the body
D) angular velocity of the body
Correct answer is (d)
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4) The change in angular momentum of a rod, when a torque of 2.5 N m is acted upon it for 2 s, is:
A) 1.25 J s
B) 2.5 J s
C) 5 J s
D) 0 J s
Correct option is (c)
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5) If size (length) of the wings of a fan in increased, its rotational speed, for the same voltage and current, will:
A) increase
B) decrease
C) remain constant
D) may increase or decrease
Correct option is (b)
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6) In body, angular acceleration is produced by:
A) net force
B) power
C) pressure
D) net torque
Correct option is (d)
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7) An astronaut feels weightless inside the International Space Station. It is because the International Space Station is:
A) outside the gravitational field of Earth
B) freely falling
C) at least
D) in motion
Correct option is (b)
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8) How many radians account for circumference of a circle?
A) 1 rad
B) 2 rad
C) pi rad
D) 2 pi rad
Correct option is (d)
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