Question

An electric iron has a rating of 1000w 220v. Calculate the current passing through its resistence

Answer 1

I = ? (current passing through the resistance)

P= 1000 w (power)

V= 220 V (Voltage)

R (resistance) = V^2/P

R = (220)(220)/1000

R = 48.4 ohm

Also,

R = V/I

48.4 = 220/I

I = 220/48.4

I = 4.54 A

Answer 2

Answer:given

p=1000 watts

v=220v

I=?

R=v^2/P

=220×220÷1000=48.4ohms

also

R=v/I

48.4=220/1

as R=V/I

RI=V

I=V/R

I=220/48.4

so, I=4.54 A

Explanation: