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JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank Different Measuring Instruments

  • question_answer
    The potential gradient along the length of a uniform wire is \[10\,volt/metre\]. \[B\] and \[C\] are the two points at \[30\,cm\] and \[60\,cm\] point on a meter scale fitted along the wire. The potential difference between \[B\] and \[C\] will be                                      [CPMT 1986]

    A)                    \[3\,volt\]

    B)                                      \[0.4\,volt\]

    C)                    \[7\,volt\]                      

    D)            \[4\,volt\]

    Correct Answer: A

    Solution :

                 Potential gradient = Change in voltage per unit length \ \[10=\frac{{{V}_{2}}-{{V}_{1}}}{30/100}\Rightarrow {{V}_{2}}-{{V}_{1}}=3\,volt\]


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