A heating element of mass 
and having specific heat of 
is exposed to surrounding air at 
. The element attains a steady state temperature of 
while absorbing 
of electric power. if the power is switched Off, then approximate time taken by the element to cool down to 
will be (neglect radiation)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Power absorbed 
Mass 
and, 
Specific heat of heater,
Heat rejected is given as
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