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Practice MCQ Questions and answers on Physics-GK

Learn and practice General Knowledge questions and answers on Physics with very easy and understandable explanations. GK questions are very helpful different type of competitive exams. Page-10 section-8

Each section contains 100 MCQs on Physics .
91
When all the forces and torques are balanced in a mechanical body it is said to be in
Discuss
Answer & Solution
Answer: Option A
Solution:
When all the forces and torques are balanced in a mechanical body it is said to be in equilibrium.
92
Centrifugal force increases with
Discuss
Answer & Solution
Answer: Option C
Solution:
Centrifugal force can be increased by increasing either the speed of rotation or the mass of the body or by decreasing the radius, which is the distance of the body from the centre of the curve.
93
The minimum number of forces to keep a particle in equilibrium is
Discuss
Answer & Solution
Answer: Option B
Solution:
Two are the minimum number of forces of equal magnitude ina plane that keep a particle in equilibrium.
94
When milk is churned, the cream separates from it due to:
Discuss
Answer & Solution
Answer: Option B
Solution:
When Milk is churned vigorously the cream from it is separated out due to Centrifugal Force. Churning physically agitates the cream until it ruptures the fragile membranes surrounding the milk fat.
95
When the milk is churned vigorously the cream from it is separated out due to
Discuss
Answer & Solution
Answer: Option D
Solution:
When Milk is churned vigorously the cream from it is separated out due to Centrifugal Force. Churning physically agitates the cream until it ruptures the fragile membranes surrounding the milk fat.
96
A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left hand. If he transfers the fish into the bucket, the total weight on the pan
Discuss
Answer & Solution
Answer: Option C
Solution:
Before transferring the fish, the position is the man with the fish and the bucket of water. After transferring the position is: the man without the fish, but the fish inside the water in the bucket. Thus to know whether there is any change in weight, it is enough to consider whether there is any change in weight when the fish in air is transferred into the water. The answer is there is no change as when in water though it loses weight due to upthrust of water on it, the level of water increases and exerts an equal force at the bottom.So, (c) is correct.
97
A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps
Discuss
Answer & Solution
Answer: Option B
Solution:
A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down.
98
A body moving in a circular path with a constant speed has a
Discuss
Answer & Solution
Answer: Option C
Solution:
A body moving in a circular path with a constant speed has a constant kinetic energy.
99
The point where total mass of a body is supposed to be concentrated is known as
Discuss
Answer & Solution
Answer: Option B
Solution:
The centre of mass of a body or a system of particles is defined as a single point at which the whole mass of the body or system is imagined to be concentrated and all the applied forces acts at that point. It is that point that moves when forces are applied on the body.
100
The angle in which a cricket ball should be hit to travel maximum horizontal distance is :
Discuss
Answer & Solution
Answer: Option B
Solution:
The angle in which a cricket ball should be hit to travel maximum horizontal distance is 45° with horizontal.