Answer to Question #141391 in Physics for Arvin Shopon

Question

The power of the car's rear window heater is 290 W when connected to a 12 V battery. Lower the current flowing through the heater.

Answer 1

By definition, the power is:

$$P = UI$$

where $U$ is a voltage and $I$ is a current. Expressing the current, obtain:

$$I = \dfrac{P}{U} = \dfrac{290W}{12V} \approx 24.17A$$

Answer. $I = 24.17A$.