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12th Class Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank MCQ - Current Electricity

  • question_answer
      AB is a wire of potentiometer with the increase in the value of resistance R, the shift in the balance point J will be:   

    A) towards B              

    B) towards A              

    C) remains constant    

    D) first towards B, then back towards A                

    Correct Answer: A

    Solution :

    (a) towards B                                        Due to increase in resistance R the current through the wire will decrease and hence the potential gradient also decreases, which results in increase in balancing length. So J will shift towards B.


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