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Electricity multiple choice question
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DRDANDY
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Bit confused about this one...
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The mark scheme says B but I'm convinced it should be C...I thought if the resistance of one branch changes and the other remains fixed then they get different shares of the current?
The mark scheme says B but I'm convinced it should be C...I thought if the resistance of one branch changes and the other remains fixed then they get different shares of the current?
Last edited by DRDANDY; 3 months ago
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Joinedup
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You're told to assume that the battery has negligible internal resistance so the pd across the fixed resistor potential divider is constant.
Constant pd across fixed resistors means the current in the fixed resistance branch is independent of what's going on in the NTC branch.
Constant pd across fixed resistors means the current in the fixed resistance branch is independent of what's going on in the NTC branch.
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Driving_Mad
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2 must be true because the resistance across that branch is constant, so the current through those resistors is unchanged as they have the same voltage across the whole branch too.
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