## What is the resistance of a 1500 w ( 120 v) hair dryer? b. what is the current in the hair dryer when it is used?

Question

What is the resistance of a 1500 w ( 120 v) hair dryer?
b. what is the current in the hair dryer when it is used?

in progress 0

1. a) power = IV
From ohms law. I =V/R
So, Power = VV/R

Therefore, R (resistance) = VVu00f7 Power

R = (120×120)u00f7 1500
= 9.6 ohs.

b) From ohm’s law, V=IR
So, I = V/R
= 120u00f7 9.6
= 12.5 A

2. Ohm’s law claims that the voltage across a conductor is directly proportional to the current flowing through it.

(a) The resistance of the hairdryer will be 9.6 ohms.

(b)the current in the hairdryer will be 12.5 A.

When all physical parameters and temperature are constant,

Ohm’s law claims that the voltage across a conductor is directly proportional to the current flowing through it.

This currentvoltage connection may be expressed mathematically as,

The Equation of Ohm’s Law

V=IR

(a)

The following data are given as

P = 1500 w

v = 120 v

The power generated in the hairdryer

[tex]rm{P = vI}I=frac{P}{v} I=frac{1500}{120}I=12.5 A}[/tex]

To obtained the resistance

[tex]rm R=frac{v}{I} rm R=frac{120}{12.5} R= 9.6 ohm}[/tex]

Hence the resistance of the hairdryer will be 9.6 ohms.

(b)

The Equation of Ohm’s Law

V=IR

[tex]rm I =frac{V}{R} rm I =frac{120}{9.6} I= 12.5 A[/tex]

Hence the current in the hairdryer will be 12.5 A.