Question

(a)An electric bulb is rated at 200 V; 100 W. What is its resistance ?
(b)Calculate the energy consumed by 3 such bulbs if they glow
continuously for 10 hours for complete month of November.
(c) Calculate the total cost if the rate is 76.50 per unit.​

Answer 1

Answer:

a) 66Potential difference = 200v

power = 100w

P = VI

100w = 200 x I

100/200 = I

I = 1/2 = 0. 5 A

R = V /I

R = 200/0.5 = 400 ohm