Physics General Knowledge Questions: Physics GK Question for Competitive Exams
A wooden swing is swinging in a sitting position, the time period of oscillations when the girl is standing?
(A) will decrease
(B) remain unchanged
(C) will be more
(D) none of these
Correct Answer : A
What is Newton's first law of motion called?
(A) Law of conservation of momentum
(B) Law of mobility
(C) Law of inertia
(D) None of these
Correct Answer : C
Skating on ice shows that on increasing the pressure the melting point of ice
(A) decreases
(B) increases
(C) remains unchanged
(D) first decreases then increases
Correct Answer : A
Which of the following does not have kinetic energy?
(A) fired bullet
(B) Spring energy
(C) moving hammer
(D) flowing water
Correct Answer : B
Explanation :
Spring energy is the energy stored in a spring when it is expanded or contracted by using an external force. This is stored as elastic potential energy and is not a form of kinetic energy.
When milk is churned, the butter separates from it, what is the reason for this?
(A) Gravitational force
(B) Frictional force
(C) Centrifugal force
(D) Heat
Correct Answer : C
Explanation :
When milk is churned, the cream is separated from it due to centrifugal force because this force acts in an outwards direction. Due to this outward force, the heavier particles in milk experience more force than the lighter particles. The cream part, being heavier, separates from the milk and gets churned out.
Which of the following devices converts alternating current into direct current?
(A) Alternator
(B) Condenser
(C) Transformer
(D) None of these
Correct Answer : A
Which of the following pairs of physical quantities do not have the same dimensional formula?
(A) Force and Pressure
(B) Weight and Force
(C) Impulse and Momentum
(D) Work and Energy
Correct Answer : A
Ice is floating on water in a beaker when the ice melts completely, the level of water in the beaker will be?
(A) will increase
(B) first increase then decrease
(C) will decrease
(D) will remain the same
Correct Answer : D
Explanation :
Therefore, when the ice melts its volume decreases but the volume of water will remain the same. Hence even after the ice melts, there will be no rise in the level of the water. So, the level of the water will remain unchanged.
A person climbing a hill leans forward because?
(A) Able to walk fast
(B) To increase stability
(C) To conserve power
(D) Reduce the chances of slipping
Correct Answer : B
Force is the product of?
(A) mass and velocity
(B) weight and acceleration
(C) mass and acceleration
(D) weight and velocity
Correct Answer : C
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Rajesh Bhatia
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