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Physics circuit question

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I can't get the answer to the second part of this question supposedly it is 3.75 ohms? Can someone explain how you would get it?
(edited 10 years ago)
Reply 1
bump


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Reply 2
surely its just another 6 ohms but that seems to obvious.. which exam board is this?
Reply 3
Original post by Bobjim12
surely its just another 6 ohms but that seems to obvious.. which exam board is this?


CCEA unit 2 as level


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