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

  • question_answer Two bulbs are in parallel and they together consume 48 W from a battery of 6 V. The resistance of each bulb is

    A)            \[0.67\,\Omega \]             

    B)            \[3.0\,\Omega \]

    C)            \[4.0\,\Omega \]                

    D)            \[1.5\,\Omega \]

    Correct Answer: D

    Solution :

                       The bulbs are connected in parallel, hence each bulb consumes \[\frac{48}{2}=24\,W.\] Therefore \[\frac{{{V}^{2}}}{R}=24\,\] Þ \[R=\frac{6\times 6}{24}=1.5\,\Omega \]


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