Physics GK Questions
Q : The unit of which of the following is not newton-metre?
(A) Force
(B) Energy
(C) Work
(D) kinetic Energy
Which of the following is not a unit of heat?
(A) Calorie
(B) Phon
(C) Joule
(D) Kcal
The correct answer is Phon. Phon is not a unit of Heat.
Where will it take more time to cook rice?
(A) on the beach
(B) in Shimla
(C) Mount Everest
(D) at the depth of the sea
What happens to the temperature of a liquid when it evaporates?
(A) increase
(B) remain unchanged
(C) grow faster
(D) decrease
During the process of evaporation of liquid the temperature of the liquid decreases because the surface molecules while evaporating take some amount of energy from the other molecules of liquid. Thus, evaporation leads to cooling. Kinetic energy is proportional to absolute temperature.
The reason for the diffusion of light in the atmosphere is?
(A) Carbon dioxide
(B) Water Vapor
(C) Helium
(D) Dust Particles
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
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
It is due to the surface tension of the liquid.
What is the reason for the spherical shape of a liquid drop?
(A) Viscosity
(B) Light Load
(C) Surface Tension
(D) Atmospheric Pressure
The working principle of the washing machine is?
(A) Sub-Centre
(B) Diffusion
(C) Centrifugation
(D) Dialysis
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
Hence, according to Archimedes' principle, the upthrust is more than the weight of the ship. That is why the iron ship floats in water.
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