Question

A light bulb has the rating 200 W 220V
1) find the peak value of current
2) If the supply voltage is 200V ,then find power consumed by the bulb​

Answer 1

Answer:

a) 0.9 A

b) 180 W

Explanation:

P = 200 W

V = 220 V

a) we know that

P = V.I

200 = 220.I

I= 20/22

=10/11

=0.9 A

b) now, V' = 200 V

I = 0.8 A

P = V.I

=200×0.9

=180 W