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PHYSICS

JAMB 2009 - Question 23

Physics 2009 JAMB Past Questions - Question 23: A heating coil rated 1000W is used to boil off completely 2 kg of boiling water. The time required to boil off the water is ?

Choose the correct answers from the options given.

A heating coil rated 1000W is used to boil off completely 2 kg of boiling water. The time required to boil off the water is ?

A: 1.15 x 10³ s

B: 1.15 x 10³ s

C: 4.6 x 10³ s

D: 4.6 x 10³ s

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Correct Answer

Explanation

Heat supplied = Heat gained
pt = ml
T = ml/p

= 2×2.3×10^6/1000

= 4.6 x 10^3sec