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NEET Sample Paper NEET Sample Test Paper-38

  • question_answer
    A current of 3 A flows through the \[2\,\Omega \]resistor as shown in the circuit. The power dissipated in the \[5\,\Omega \]resistor is

    A)  4W          

    B)  2W

    C)  1 W         

    D)  5 W

    Correct Answer: D

    Solution :

     Voltage across \[\,2\,\Omega \]is the same as voltage across arm containing\[\,1\,\Omega \]and\[\,5\,\Omega \]resistances. Voltage across \[\,2\,\Omega \] resistance, \[V=2\times 3=6V\] So, voltage across lowest arm, \[{{V}_{1}}=6V\] Current across\[5\,\Omega ,I=\frac{6}{1+5}=1\,A\] Thus, power across \[5\,\Omega ,\] \[P={{I}^{2}}R={{(1)}^{2}}\times 5=5\,W\]


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