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 Self Evaluation Test - Current Electricity

  • question_answer
    When a current I is set up in a wire of radius r, the drift velocity is \[{{v}_{d}}.\] If the same current is set up through a wire of radius 2 r, the drift velocity will be

    A) \[4{{v}_{d}}\]  

    B) \[2{{v}_{d}}\]

    C) \[{{v}_{d}}/2\]

    D) \[{{v}_{d}}/4\]

    Correct Answer: D

    Solution :

    [d] \[\therefore \,\,\,\,\,\,3-1=4\times {{10}^{-3}}\times t\]


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