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june 2010 question 2ai- g482 ocr physics

runny4

why couldn't you say that bulb has a power rating of 25w for one mark- see examiners report

Reply 1

Duskstar

Original post by runny4

why couldn't you say that bulb has a power rating of 25w for one mark- see examiners report

That's what the question says. The question asks you what that means.

Reply 2

runny4

Original post by Duskstar

That's what the question says. The question asks you what that means.

ok but how do u know the power rating is 25W because say if u had a voltage of 400V the power would increase. It doesn't specifically say that its the power rating- the max power allowed.

Reply 3

Duskstar

Original post by runny4

ok but how do u know the power rating is 25W because say if u had a voltage of 400V the power would increase. It doesn't specifically say that its the power rating- the max power allowed.