Question

solve this question.​

Answer 1

Power, P = I^2 R = (0.5)^2 × 400 = 100 W

Also, P = I. V

Potential difference, V = P/I = 100/ 0.5 = 200 V

Answer 2

Answer:

given

R = 400 ohm

I = 0.5 A

we know that

R = V/I

R*I = V

400*0.5 = V

V = 200 V

we know that,

P = VI

= 200*0.5

= 200*1/2

= 100 W