Question

1. An electrical heater is used for 5 hours on a
220 V supply and takes a current of 5 amperes.
What is power ?
(a) 41 W
(b) 110 W
(c) 44 W
(d) 1100 W​

Answer 1

Answer:

Voltage=220V

Current=5amperes

now,V=W/Q ____________ (i)

I=Q/T _______________(ii)

Multiplying (i) and (ii),

W/Q x Q/T= W/T=Power

Hence,Power=VI

= 220 x 5 = 1100 W (d)

This answer is from a student of class 9

THANK YOU