Question

A torch bulb is rated 2.5 and 750 mA find (1) power (2) resistence

Answer 1

750 mA = 0.75 A

Power = Volt x Current
           = 2.5 x 0.75
           = 1.875 Watts

Resistance = Volt / Current
                   = 2.5 / 0.75
                   = 3.33 Ohms