Question

A torch bulb is rated 2.5 v and 750 m
calculate a its power and calculate be energy consumed if this bulb is lighted for 4 hours

Answer 1

Answer:

P=VI

=> P= 2.5 *0.75=1.875 W

Energy consumed in four hours = P * 4 hours

= P* 4*60*60

= 1.875*3600*4

= 27000 J