Question

If a 120 V appliance requires 15 A to operate, what is the resistance of the appliance?

Answer 1

The resistance is 16 ohm's

V=I x R where V is the voltage, I is the current, and R is the resistance in Ohms

120= 15 x R

R=120/15

R= 8 Ohm's

P=VxV / R

P=120v x 120v / 8 ohms

P= 14400/8

P = 1800 watts

R = V x V/P

R = 14400/900

R = 16 Ohm's

The resistance is 16 ohm's:

I = V/R

I = 120/16

I = 7.5 Amps