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
    When a piece of aluminium wire of finite length is drawn through a series of dies to reduce its diameter to half its original value, its resistance will become                                 [NCERT 1974; AIIMS 1997; MH CET 2000; UPSEAT 2001; CBSE PMT 2002]

    A)                                                      Two times

    B)                                      Four times

    C)                    Eight times                    

    D)            Sixteen times

    Correct Answer: D

    Solution :

                 In stretching of wire \[R\propto \frac{1}{{{r}^{4}}}\]


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