Question

The heating element of an iron operates at 110 V with a current of 9A. (a) What is the resistance of the iron?

(b) What is the power dissipated by the iron?

Answer 1

(A) 12.222 ohm (B) 990 W

Step-by-step explanation:

We have given the voltage of the heating element V = 110 V

The current in the heating element i = 9 A

(a) According to ohm's law V =iR

So
`110=9* R`

`R=(110)/(9)=12.222ohm`

(b) The power dissipated in the resistor is given by
`P=i^2R=9^2* 12.222=990W`

So the power dissipated = 990 W