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
Verified Correct Answer: D.
Physical Principles & Numerical Solution
Q = \(I^2RT\)
= \(4^2\) x 50 x 2 x 60
= 96000J
Source: Myschool Past Questions Archive (Record #35670)