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Physics unit 2 circuits.

I have no idea again, I'm guessing I'll be using P=IV, but I'm not sure how to do any of it really? I'm sure if I was to be told a I could get the rest? Cheers.

(edited 11 years ago)

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Reply 1

Hazeltine

I think I could do it if it was in series, but it being in parallel is throwing me...

895.83A for a?

Original post by Hazeltine

895.83A for a?

In a parallel circuit, the voltage across each "section" is the same - in this case V(s) - 240V - the supply voltage.

Since we already know the power (100W) use P=IV.

I = 100/240 etc...

Edit: That was the explanation for 1a). Is that what you wanted?

(edited 11 years ago)

Reply 4

Hazeltine

Oh right, I wasn't sure on that. Thanks very much! Makes things much easier that way round!

Reply 5

Sgt.Incontro

Original post by Hazeltine

Oh right, I wasn't sure on that. Thanks very much! Makes things much easier that way round!

No problem. :smile:

Next time take a second look at your answer and see if it looks realistic - 895A is literally an unheard of amount. It's a good exam technique. :tongue: