CET Karnataka Medical CET - Karnataka Medical Solved Paper-2014

  • question_answer
    A tuned amplifier circuit is used to generate a carrier frequency of 2 MHz for the amplitude modulation. The value of \[\sqrt{LC}\] is           

    A)  \[\frac{1}{3\pi \times {{10}^{6}}}\]          

    B)  \[\frac{1}{2\pi \times {{10}^{6}}}\]

    C)  \[\frac{1}{4\pi \times {{10}^{6}}}\]

    D)  \[\frac{1}{2\times {{10}^{6}}}\]

    Correct Answer: C

    Solution :

    :  \[\upsilon =\frac{1}{2\pi \sqrt{LC}}\] \[\therefore \] \[\sqrt{LC}=\frac{1}{2\pi \upsilon }\] Here, \[\upsilon =2\text{ }MHz=2\times {{10}^{6}}\text{ }Hz\] \[\therefore \]       \[\sqrt{LC}=\frac{1}{2\pi \times 2\times {{10}^{6}}}=\frac{1}{4\pi \times {{10}^{6}}}\]


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