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 Chemical Effect of Current

  • question_answer
    A copper voltameter is connected in series with a heater coil of resistance \[0.1\,\Omega \]. A steady current flows in the circuit for twenty minutes and mass of 0.99 g of copper is deposited at the cathode. If electrochemical equivalent of copper is 0.00033 gm/C, then heat generated in the coil is  [Pb. PET 2002]

    A)                    750 J                                 

    B)                    650 J

    C)                    350 J                                 

    D)                    250 J

    Correct Answer: A

    Solution :

                       m = Z i t Þ \[i=\frac{m}{Zt}=\frac{0.99}{0.00033\times 1200}=2.5A\] Hence heat generated in the coil is \[H={{i}^{2}}Rt={{(2.5)}^{2}}\times 0.1\times 1200\]= 750 J


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