Physics GK Quiz with Answers
he temperature at which ice, water and vapour remain in equilibrium is called?
(A) freezing point
(B) triple point
(C) critical temperature
(D) boiling point
Correct Answer : B
Explanation :
The technical term for this is the triple point of water since at this temperature, not only solid ice and liquid water, but also water vapor coexist. The temperature and pressure conditions that allow a substance's gaseous, liquid, and solid phases to exist in equilibrium is called triple point of the substance.
The application of low-temperature engines is?
(A) submarine propulsion
(B) research on superconductivity
(C) rocket technology
(D) frost free refrigerators
Correct Answer : C
Explanation :
Low-temperature combustion (LTC) is a recent engine technology that can reduce the oxides of nitrogen (NOx) and soot emissions simultaneously while maintaining higher thermal efficiency.
The colour of the sky appears to be blue.
(A) due to diffraction
(B) due to scattering
(C) due to reflection
(D) due to refraction
Correct Answer : B
Explanation :
The sky appears blue to the human eye as the short waves of blue light are scattered more than the other colours in the spectrum, making the blue light more visible.
What is the reason for the spherical shape of a liquid drop?
(A) Viscosity
(B) Light Load
(C) Surface Tension
(D) Atmospheric Pressure
Correct Answer : C
Explanation :
Due to surface tension, surface tries to minimize its area. As sphere has the minimum surface area among all geometrical shapes thus, liquid drop becomes spherical.
The working principle of the washing machine is?
(A) Sub-Centre
(B) Diffusion
(C) Centrifugation
(D) Dialysis
Correct Answer : C
Explanation :
The working principle of a washing machine is centrifugation. Centrifugation is a separation process that uses the action of centrifugal force to promote accelerated settling of particles in a solid-liquid mixture.
Which of the following particle is not related to the nucleus of an atom?
(A) Electron
(B) Proton
(C) Neutron
(D) Meron
Correct Answer : A
Explanation :
Thus, among the subatomic particles, electrons are not a part of the nucleus.
Why don't birds feel shortness of breath while flying at high altitudes?
(A) Their lungs are very large
(B) They fly passively
(C) They have additional air sacs
(D) They use less oxygen
Correct Answer : C
Explanation :
Because flying takes a tremendous amount of energy, birds need to get lots of oxygen. The air sacs in their lungs help them to keep fresh air flowing in, unlike mammals, where the “old” air within the trachea and mouth (which has low oxygen content and high CO2 levels) in inhaled each time.
Who was the first President of India to fly for 30 minutes in a Sukhoi fighter aircraft of the Indian Air Force?
(A) A P J Abdul Kalam
(B) Mrs. Pratibha Patil
(C) K. R. Narayan
(D) Dr. Shankar Lal Sharma
Correct Answer : B
Explanation :
In order to slide a huge box lying on the ground in her room, Reshma should apply a force which is greater than which of the following forces?
(A) Static friction
(B) Gravitational force
(C) Normal force
(D) Muscular force
Correct Answer : A
Explanation :
So, In order to slide a huge box lying on the ground in her room, Reshma should apply a force greater than the Static friction.
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
Correct Answer : C
Explanation :
At higher altitude, water starts boiling at lower temperature and heat required for cooking food is not available, because heat escapes in form of water vapour. So, rice takes longer time to cook at Mount Everest.
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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/.
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