Physics GK Quiz with Answers
An iron needle sinks in water but a ship floats, on what principle is this based?
(A) Pascal's principle
(B) Principle of Archimedes
(C) Law of Gravitation
(D) None of these
Correct Answer : B
Explanation :
Hence, according to Archimedes' principle, the upthrust is more than the weight of the ship. That is why the iron ship floats in water.
The unit of which of the following is not newton-metre?
(A) Force
(B) Energy
(C) Work
(D) kinetic Energy
Correct Answer : A
Which of the following is not a unit of heat?
(A) Calorie
(B) Phon
(C) Joule
(D) Kcal
Correct Answer : B
Explanation :
The correct answer is Phon. Phon is not a unit of Heat.
If the electrical resistance is to be reduced, then the number of resistors should be connected with
(A) Mala (Series)
(B) Parallel
(C) Mixed system
(D) None of These
Correct Answer : C
Explanation :
When resistors are connected in parallel, more current flows from the source than would flow for any of them individually, so the total resistance is lower.
Bernoulli's theorem is based on?
(A) on energy conservation
(B) on conservation of momentum
(C) on conservation of charge
(D) none of these
Correct Answer : A
Explanation :
Bernoulli's principle is based on the law of conservation of energy. We equate total energy (pressure energy, potential energy and kinetic energy) of a flowing liquid at different points flowing under constant pressure difference.
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.
The amount of buoyancy obtained by a solid partially or fully immersed in a liquid depends on?
(A) on the amount of liquid displaced by the solid
(B) on the weight of the solid
(C) on the mass of the solid
(D) none of these
Correct Answer : A
Explanation :
Archimedes' principle states that : "The upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the volume of the fluid that the body displaces."
The reason why a needle floats on top of the water is?
(A) Surface tension
(B) Adhesion
(C) Cohesion
(D) Capillarity
Correct Answer : A
Explanation :
It is due to the surface tension of the liquid.
If the length of the pendulum is made four times, then the time of swing of the pendulum?
(A) Decreases
(B) Becomes Four Times
(C) Becomes One Fourth
(D) Doubles
Correct Answer : D
Explanation :
Therefore we can say that time period is directly proportional to square root of length of the pendulum. Therefore as the length of the pendulum becomes four times, the time period becomes the 2 times.
Showing page 2 of 4
enhttps://www.examsbook.com/physics-gk-quiz-with-answers/242physics-gk-quiz-with-answersAbout author
Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
Read more articles