Question

please answer to the question

here isn't we use
P=v×I.
my doubt is this..

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please answer to this fast​

Answer 1

P=25W V=100V

NOW, P=VI

25=100×I

I=1/4

NOW,I=1/4 V=50V

P=VI

P=50×1/4

P=12.5W

PLEASE PLEASE MARK IT BRAINLIEST

Answer 2

Here u cant use p=vi bcoz its useless as u will get 2 values of current for different powers nd u dont need current.Here u need to find the resistance of the bulb frm the rated power and then using it find the new power.Hope u understud!!