JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर JEE PYQ-Current Electricity Charging and Discharging of Capacitors

  • question_answer
    A galvanometer having a coil resistance \[100\,\,\Omega \] gives a full scale deflection when a current of 1 mA is passed through it. What is the value of the resistance which can convert this galvanometer into a voltmeter giving full scale deflection for a potential difference of 10 V? [JEE MAIN Held on 08-01-2020 Evening]

    A) \[10\text{ k}\,\Omega \]

    B) \[9.9\text{ }k\Omega \]

    C) \[8.9\text{ }k\Omega \]

    D) \[7.9\text{ }k\Omega \]

    Correct Answer: B

    Solution :

    [b] V = 10 volt
    When 1 mA current will be flowing
    \[\therefore 10=1\times {{10}^{3\text{ }}}\left( 100+{{R}_{0}} \right)\]
    \[\Rightarrow 10000100=9900\text{ }\Omega ={{R}_{0}}\]
    \[\Rightarrow {{R}_{0}}=9.9\text{ }k\Omega \]


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