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JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank Electric Conduction Ohms and Resistance

  • question_answer
    A piece of wire of resistance 4 ohms is bent through \[180{}^\circ \] at its mid-point and the two halves are twisted together, then the resistance is                                                                [CPMT 1971]

    A)                    8 ohms

    B)                                      1 ohm

    C)                    2 ohms

    D)                                      5 ohms

    Correct Answer: B

    Solution :

                 In twisted wire, two halves each of resistance \[2\Omega \]are in parallel, so equivalent resistance will be \[\frac{2}{2}=1\Omega \].


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