2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर

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

  • question_answer
    In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2 W, the balancing length becomes 120 cm. The internal resistance of the cell is                                     [DCE 2002; AIEEE 2005]

    A)         4 W                                   

    B)         2 W

    C)         1 W                                   

    D)         0.5 W

    Correct Answer: B

    Solution :

                                             \[r=R\,\left( \frac{{{l}_{1}}}{{{l}_{2}}}-1 \right)\]\[=2\,\left( \frac{240}{120}-1 \right)\] \[=2\,\Omega \]


You need to login to perform this action.
You will be redirected in 3 sec spinner