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NEET Sample Paper NEET Sample Test Paper-17

  • question_answer
    The electric current in a circuit is given by: \[i=3t.\]Here t is in second and current in ampere. The rms current for the period t = 0 to t = 1 sec is:

    A)  3 A                             

    B)  9 A                 

    C) \[\sqrt{3A}\]               

    D) \[\sqrt[3]{3A}\] 

    Correct Answer: C

    Solution :

    \[{{t}^{2}}=9{{t}^{2}}\] \[\therefore \]Mean square current \[=\frac{\int_{0}^{1}{9{{t}^{2}}dt}}{\int_{0}^{1}{dt}}=3\] \[\therefore \]\[{{i}_{rms}}=\sqrt{3}A\] Hence, the correction option is [c].


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