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A north american tourist takes his 40.0 w, 120 v ac razor to europeand plugs it into 240 v ac. assuming constant resistance, what power does the razorconsume as it is ruined?

Respuesta :

  • 160 watt
  • From joules law of heating, current flows through a resistor, converts a part of electric energy into heat energy.

The rate at which the power dissipated through a resistor is,

P = V^2/R

  • Here,V is the applied voltage or voltage from source Ris the resistance of the resistor, Resistance of the device Ac razor)is,

R = V^2/P

= (120)^2/ 40

= 14400/40

= 360 ohm

  • NOW, the input voltage is change to V1, new power consumed by the razor is

P1 = V1^2/R

= (240)^2/360

= 57,600/360

=160 watt

Joule's law is the e rate at which heat is produced in a conductor is directly proportional to the square f the current provided is resistance is constant.

To know more about  joules law of heating   visit : https://brainly.com/question/23866366

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