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Chapter 32: Q. 34 (page 925)

The heating element of a hair drier dissipates 1500Wwhen connected to a 120V/60Hzpower line. What is its resistance?

Short Answer

Expert verified

In a circuit power is dissipated by resistance only.

Step by step solution

01

Given information

We have given the values ,

P=1500WV=120Vf=60Hz

02

Calculation

In a circuit power is dissipated by resistance elements only.

So using formula of power dissipation i.e

P=V2R

Substituting given values in above equation, we get

localid="1649924337177" 1500=(120)2/RR=(120)2/1500R=9.6Ω

Hence, required value of resistance is localid="1649924341773" 9.6Ω

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