Physics > 2013 > 22
WASSCE
An electric heater has a resistance of 50Ω. When it is immersed in water and connected to main source, it draws a current of 4A. Calculate the heat gained by the water if the heater is switched on for 2 minutes, assuming no heat losses to the surroundings
A.
400 J
B.
1600 J
C.
24000 J
D.
96000 J
Answer: D
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