A calorimeter contains 10 g of water at 
. The temperature falls to 
in 10 min. When calorimeter contains 20 g of water at 
, it takes 15 min for the temperature to become 
. The water equivalent of the calorimeter is
Text Solution
Verified by ExpertsThe correct answer is:
B
Let water equivalent be 
.
where, c is the specific heat of water,
and 
time at which temperature falls
… (i)
and 
… (ii)
From Eqs. (i) and (ii), we get
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