Question :

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 : C

Description :



Related Questions - 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


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

View Answer

Related Questions - 2


Sound waves in air are


A) transverse
B) longitudinal
C) electromagnetic
D) polarised

View Answer

Related Questions - 3


If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same


A) velocity
B) momentum
C) acceleration
D) kinetic energy

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Related Questions - 4


Pick out the scalar quantity


A) force
B) pressure
C) velocity
D) acceleration

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Related Questions - 5


Mirage is due to


A) unequal heating of different parts of the atmosphere
B) magnetic disturbances in the atmosphere
C) depletion of ozone layer in the atmosphere
D) equal heating of different parts of the atmosphere

View Answer