Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
A. The heating effect of current alone
B. Hysteresis loss alone
C. Both the heating effect of current and hysteresis loss
D. Intense sunlight at noon
Answer: Option C
Solution(By Examveda Team)
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to both the heating effect of current and hysteresis loss.This Question Belongs to General Knowledge >> Physics
Join The Discussion
Comments ( 2 )
Which of the following terms is not used in the field of physics?
A. Latent heat
B. Nuclear fusion
C. Refractive index
D. Stock value
Radiocarbon is produced in the atmosphere as a result of
A. Collision between fast neutrons and nitrogen nuclei present in the atmosphere.
B. Action of ultraviolet light from the sun on atmospheric oxygen.
C. Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere.
D. Lightning discharge in atmosphere.
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
A. Work done in rolling is more than in lifting.
B. Work done in lifting the stone is equal to rolling it.
C. Work done in both is same but the rate of doing work is less in rolling.
D. Work done in rolling a stone is less than in lifting it.
The absorption of ink by blotting paper involves:
A. Viscosity of ink
B. Capillary action phenomenon
C. Diffusion of ink through the blotting
D. Siphon action
Hyseteresis losses kya hota ha
When current flow through winding it produce I2R losses. it also produce hysteresis loss due to magnetising effect.