Physics, asked by parvanendhusashok, 1 month ago

on an electrical appliance it is marked 800w and 400v. Find the power of the device when the volt is decreased into 200v

Answers

Answered by SamratAshok753

0

Answer:

Power = Voltage*current

W = VI

W = 400 W

Explanation:

Given

W1 = 800W

V1 = 400V

therefore

I = W1/V1

I = 800/400

=2

now , power at 200 V

W = VI

= 200*2

W = 400 W

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