Question

An electric iron has a rating of 750W, 220V. Calculate the: [1] current flowing through it, and [2] it's resistance when in use

Answer 1

Answer:

Explanation:

Power =750w

Voltage=220v

Current flowing I=750/220

=3.5 amp (approx)

By ohm's law,

V=IR

=> R=220/3.5.

=> R=750 ohm

Answer 2

Answer: 1) 3.40A

              2) 64.7 ohms

Explanation:

P= 750W  ;  V= 220 VOLTS

P= V x I

I = P/V

 = 750/220

 = 3.40 A

BY ohm's Law

V= I x R

R=V/I

R= 220/3.40

  = 64.7 ohms

THEREFORE CURRENT PASSING THROUGH  THE CIRCUIT IS 3.40 A

AND RESISTANCE IS 64.7 ohms