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Heat is supplied uniformly at the rate of 100W to 1.0 x 10(^{-2})kg of a…

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) 

There is an explanation video available below.

Explanation Video