Three resistances 2 ohm, 3 ohm and 4 ohm are connected in parallel. The ratio of currents passing through them when a potential difference is applied across its ends ?

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Q. A resistance of

3 o h m s

is connected in series with another resistance of

5 o h m s

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When a potential difference of 2 V is applied across the ends of a wire of $5 m$ length, a current of $1 A$ flows through it. Calculate the resistance across the ends of the wire if its length is doubled.

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