Join TSR now and get all your revision questions answeredSign up now

Please help with one mark physics question Watch

    • Thread Starter

    Name:  Capture.PNG
Views: 19
Size:  14.3 KBplease explain your method

    Use the relationship between P and R.
    As you know, P=I^2R and as current is constant throughout the circuit, P \propto R
    Knowing that 1W is converted from R, you can work out using ratios the rest and therefore the output power of the cell using P_{in} = P_{out}
What is your favourite film genre?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.