Question

A torch bulb is rated at 2.5 V and 750mA. Calculate its (a)Electric power. (b)its Resistance. (c)the energy consumed if the bulb is light is for 4 hours.

Answer 1

Answer:

Given,

V=2.5 V

I= 750 mA = 0.75 A

(a).Electric Power=V×I

=2.5 × 0.75

= 1.875 Watt.

(b).Resistance=V/I

=2.5/0.75

=3.33 Ohm

(c). Energy Consumed=P×t

=1.875×4×60

=45000 Joules

HOPE THIS WILL HELP YOU !