Physics, asked by emankaushik, 1 year ago

plz solve the problem 17

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Answered by harshjainn2003

Dude first find R for both the cases. Then u know V and R for both lamps. U use the ohm's law to find I in both cases. Whatever value u get for both cases,just divide them both to get the ratio.

ttchamp: 2:1 is incorrect answer;correct answer is 50:27

emankaushik: how

emankaushik: u have taken 110w but in question it is 100 w

ttchamp: i made a mistake

harshjainn2003: Oh sorry

emankaushik: it's ok

harshjainn2003: :)

emankaushik: but thx for help me

harshjainn2003: Ur welcome

ttchamp: correct answer is 5:3

Answered by ttchamp

First find R from P=IV

Attachments:

emankaushik: how that 0.5/ 0.25 has came

ttchamp: from I=p/v

emankaushik: it should be 0.5 /0.27

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