#### Question

How much energy is consumed when a current of 5 amperes flows through the filament (or element) of a heater having resistance of 100 ohms for two hours? Express it in joules.

#### Solution

Given:*I* = 5 A*R* = 100 Î

Power consumed, *P*= *I*^{2}*R*

= (5)^{2} 100 watt

= 2500 watts=2.5 kW

Energy consumed, *E* = *P* x time

= 2.5 x 2

= 5 kWh

Is there an error in this question or solution?

Solution How Much Energy is Consumed When a Current of 5 Amperes Flows Through the Filament (Or Element) of a Heater Having Resistance of 100 Ohms for Two Hours? Express It in Joules. Concept: Ohm’s Law.