Question

An electrical heater is rated 1kW 200V calculate the resistance

Answer 1

Answer:

400 Ohm.

Step-by-step explanation:

P = V ×V/R

1 = 200×200/R

1 = 400/R

R = 400 Ohm.

Answer 2

R is 40Ω

P = 1kw = 1000watt
v = 200v

P = VI

and I = V/R

Therefore,

P = V × V/R
= V²/R
1000 = 200×200/R
R = 40000/1000
= 40Ω