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JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank Grouping of Resistances

  • question_answer
    In the Wheatstone's bridge shown, \[P=2\,\Omega ,\] \[Q=3\,\Omega ,\] \[R=6\,\Omega \] and \[S=8\,\Omega \]. In order to obtain balance, shunt resistance across 'S' must be                                        [SCRA 1998]

    A)            \[2\,\Omega \]

    B)                    \[3\,\Omega \]

    C)                    \[6\,\Omega \]

    D)                    \[8\,\Omega \]

    Correct Answer: D

    Solution :

                 Let the value of shunt be r. Hence the equivalent resistance of branch containing S will be \[\frac{Sr}{S+r}\] In balance condition, \[\frac{P}{Q}=\frac{Sr/(S+r)}{R}\]. This gives \[r=8\Omega \]


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