Heat is supplied uniformly at the rate of 100W to 1.0 x 10(^{-2})kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5(^o)C, then the specific heat capacity of the liquid is
-
A.
2.0 x 10(^2)Jkg(^-1)K(^-1) -
B.
2.0 x 10(^2)Jkg(^-1) -
C.
4.0 x 10(^4)Jkg(^-1)K(^-1) -
D.
4.0 x 10(^4)Jkg(^-1)
Correct Answer: Option C
Explanation
Heat energy = Electrical Energy
MC(theta) = power x time
5 x 1 x 10(^{-2}) x C = 100 x 20
C = (frac{200}{5 times 10^2})
= 4 x 10(^4) J/kg/(^oC)
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