An electric heater has a resistance of 50(Omega). When it is immersed in water and connected to mains source, it draws a current of 4.0A. Calculate the heat gained by the water if the heater is switched on for 2 minutes, assuming no heat losses to the surroundings
-
A.
4200J -
B.
1600J -
C.
24000J -
D.
96000J
Correct Answer: Option D
Explanation
Q = I2RT
= 42 x 50 x 2 x 60
= 96000J