JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors Question Bank Heating Effect of Current

  • question_answer A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be [AIEEE 2005]

    A)            One fourth                           

    B)            Halved

    C)            Doubled                                 

    D)            Four times

    Correct Answer: C

    Solution :

                       \[H=\frac{{{V}^{2}}t}{R}\] Þ \[\frac{{{H}_{Half}}}{{{H}_{Full}}}=\left( \frac{{{R}_{Full}}}{{{R}_{Half}}} \right)=\frac{R}{R/2}=2\] Þ \[{{H}_{Half}}=2\times {{H}_{Full}}\].

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