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

  • question_answer  On giving 220V to a resistor the power dissipated is 40W then value of resistance is         [RPMT 2000]

    A)            1210 W                                    

    B)            2000 W

    C)            1000 W                                    

    D)            None of these

    Correct Answer: A

    Solution :

               \[P=\frac{{{V}^{2}}}{R}\Rightarrow R=\frac{{{V}^{2}}}{P}=\frac{{{(220)}^{2}}}{40}=1210\,\Omega \]

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