A block of aluminum is heated electrically by a 30 w heater if the temperature rises by 10°c in 5 minutes, the heat capacity of the aluminum is
-
900 JK-1
- 90 JK-1
- 100 JK-1
- 200 JK-1
The correct answer is: A
Explanation
Heat supplied = Heat gained Pt = MCDθ30 x 5 x 60 = c x 10
where c = mc which is the heat capacity
c = (30 x 5 x60)/10 = 900 JKg-1
There is an explanation video available .