Question

A torch bulb is rated 2.5 v and 750ma calculate its power

Answer 1

Answer:

Given :

V=2.5 V

I=750mA= 750x10⁻³A

power =p=?

Power =V*I            

 =2.5x750x10⁻³

=1.875W

Answer 2

Given potential difference V = 2.5 V and

Current I = 750 mA = 0.750 A

We know power P = VI

P = 2.5 × 0.750 =  1.875 W