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(A) The circuit consists of three parallel branches connected between points $P$ and $Q$.The rightmost branch contains two resistors of $4 \ \Omega$ a

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$24$

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(A) The circuit consists of three parallel branches connected between points $P$ and $Q$.The rightmost branch contains two resistors of $4 \ \Omega$ and $12 \ \Omega$ in series,with a current of $1.5 \ A$ flowing through it.The potential difference $V_{PQ}$ across the points $P$ and $Q$ is equal to the potential difference across this branch.Using Ohm's law,$V_{PQ} = I 	imes R_{eq}$,where $R_{eq}$ is the equivalent resistance of the branch.$R_{eq} = 4 \ \Omega + 12 \ \Omega = 16 \ \Omega$.$V_{PQ} = 1.5 \ A 	imes 16 \ \Omega = 24 \ V$.

In the given electrical circuit,the potential difference between points $P$ and $Q$ is ........... $V$.

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