Question:
An electric heater of resistance 8ohm draws 15A
from the service mains 2hours.Calculate the rate
at which heat is developed in the heater.
Answer:
Rate of heat generated =Heat /time
and this is equals to power (P) of the heater.
So,in this question we will find Power of the heater.
P=H/t = Voltage×Current = (current)2× resistance
Given, current= 15 A and resistance= 8 Ω
So, P = (15)2×8
P= 1800 watt
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