Question

A 12.0 V battery causes a current of 2.0 A to flow through a lamp. What is the power used by the lamp?

Answer 1

Given:

the voltage of the battery is

`V=12\text{ V}`

The current is,

`I=2.0\text{ A}`

Required: Power used by the lamp

Step-by-step explanation:

the power is given by

`P=VI`

Plugging all the values in the above formula, we get:

`\begin{gathered} P=12\text{ V}*2\text{ A} \\ P=24\text{ watt} \end{gathered}`

Thus, the power used by the lamp is 24 watt.