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12th Class Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank MCQ - Current Electricity

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                                   Two resistors \[{{R}_{1}}\] and \[{{R}_{2}}\] of \[4\,\Omega \] and \[6\,\Omega \] are connected in parallel across a battery. The ratio of power dissipated in them, \[{{P}_{1}}:{{P}_{2}}\]will be:                                            (CBSE 2020)

    A) 4:9                               

    B) 3:2                     

    C) 9:4                               

    D) 2:3                    

    Correct Answer: B

    Solution :

    (b) 3:2                                 \[\frac{{{P}_{1}}}{{{P}_{2}}}=\frac{\frac{{{V}^{2}}}{{{R}_{1}}}}{\frac{{{V}^{2}}}{{{R}_{2}}}}\]                         \[\frac{{{P}_{1}}}{{{P}_{2}}}=\frac{{{R}_{2}}}{{{R}_{1}}}\Rightarrow \frac{6}{4}\Rightarrow 3:2\]


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