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JAMB Physics 2011 Paper
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© africaexams.com
Question : 20
Total: 44
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
Validate
Solution:
Heat supplied = Heat gained Pt = MCDθ
30 x 5 x 60 = c x 10
where c = mc which is the heat capacity
c = (30 x 5 x60)/10 = 900 JKg
-1
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