Question

Electricity iron has rating of 750w,220 v calculate a)the current passing through it b)its resistance,when in use

Answer 1

power is velocity into current

so

750=220×I

I=750/220

= 3.4 is current

now V=IR

220=3.4×R

R= 220/3.4

=64.7 is R

Answer 2

P = 750W

V = 220v

We know,

P = VI

Thus,

I = P/V

I = 750/220

therefore, I = 3.4A ( approx. )

Again,

V = IR

Thus,

R = V/I

R = 220/3.4

therefore, R = 64.7 ohm