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Question
Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 2 Ω in series with a combination of two resistors (4 Ω each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the 2 Ω resistor be the same as that across the parallel combination of 4 Ω resistors? Give reason.
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Solution
Yes, the potential difference across the 2 Ω resistor will be the same as that across the parallel combination of 4 Ω resistors because net resistance of parallel combination
= `(4 xx 4)/(4 + 4)`
= 2 Ω
and current across 2 Ω and parallel combination is the same.
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