Physics MCQ GK Questions

 

  1. Radiocarbon is produced in the atmosphere as a result of

 

collision between fast neutrons and nitrogen nuclei present in the atmosphere

action of ultraviolet light from the sun on atmospheric oxygen

action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere

lightning discharge in atmosphere

 

 

 

 


  1. It is easier to roll a stone up a sloping road than to lift it vertical upwards because

 

work done in rolling is more than in lifting

work done in lifting the stone is equal to rolling it

work done in both is same but the rate of doing work is less in rolling

work done in rolling a stone is less than in lifting it

 

 

 

 


  1. The absorption of ink by blotting paper involves

 

viscosity of ink

capillary action phenomenon

diffusion of ink through the blotting

siphon action

 

 

 

 


  1. Siphon will fail to work if

 

the densities of the liquid in the two vessels are equal

the level of the liquid in the two vessels are at the same height

both its limbs are of unequal length

the temperature of the liquids in the two vessels are the same

 

 

 

 


  1. Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to

 

the heating effect of current alone

hysteresis loss alone

both the heating effect of current and hysteresis loss

intense sunlight at noon