Question

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

Answer 1

Power = current*voltage
We have current = 750 ma or 0.75 amp
voltage = 2.5
therefore power of bulb = 2.5*0.75 = 1.875 watt
Ans

Answer 2

Hi !

Voltage = 2.5v

Current = 750 mA = 750 × 10 ⁻³A = 0.75 A

Power = Voltage ×Current
           = 2.5× 0.75
           = 1.875 Watts