AbhijotS268019 AbhijotS268019
  • 03-11-2022
  • Physics
contestada

What is the potential difference across a curling iron if there is a current of 2.5 A transferring 9360 J in 32s?

Respuesta :

CaniyaQ331829 CaniyaQ331829
  • 03-11-2022

Power is expressed as energy/time

Thus means that

power = energy/time

From the information given,

energy = 9360 J

time = 32 s

Thus,

power = 9360/32 = 292.5 J/s = 292.5 watts

The formula relating potential difference which is the same as voltage, current and power is expressed as

P = IV

where

P = power = 292.5

I = current = 2.5

V = potential difference = ?

Thus, we have

292.5 = 2.5V

V = 292.5/2.5

V = 117 V

The potential difference is 117 V

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