A TV has a power of 65 watts and an efficiency of 70 percent. How much power is wasted as heat?
A. 19.5 W
B. 2.2 W
C. 0.9 W
D. 45.5 W

Power of TV = 65Watt

If Efficiency = 70%, then the percentage of energy wasted is 30%

So, the amount of energy getting wasted:

= 30/100 × 65

= 1950/100

= 195/10

= 19.5 W

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

double the distance = divide strength by 4