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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 resistance R is stretched to four times its length. Its new resistance will be       [ISM Dhanbad 1994; UPSEAT 2003]

    A)                    4 R

    B)                                      64 R

    C)                    \[R/4\]                            

    D)            16 R

    Correct Answer: D

    Solution :

                 \[R'={{n}^{2}}R\,\Rightarrow \,R'=16R\]


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