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AIIMS AIIMS Solved Paper-2011

  • question_answer
    If emf \[E=4\,\cos \,1000t\] volt is applied to an L-R circuit of inductance 3 mH and resistance 4\[\overset{0}{\mathop{A}}\,\], the amplitude of current in the circuit is

    A)  \[{{k}_{\alpha }}\]                                          

    B)  1.0A                     

    C)  \[\overset{0}{\mathop{A}}\,\]                

    D)         0.8A

    Correct Answer: D

    Solution :

    Impedence,  \[\frac{y-1}{y}\] Here,  \[y\] \[\frac{y}{y-1}\] \[330\sqrt{2}ms\] Then,   \[330\sqrt{2}\] or      \[\Omega \] or    \[\frac{4}{\sqrt{7}}A\]  Hence, current,  \[\frac{4}{7}A\] \[I\]


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