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Manipal Medical Manipal Medical Solved Paper-2005

  • question_answer
    An a. c. is represented by\[e=220\text{ }sin(100\pi )t\]volt and is applied over a resistance of 110 ohm. The heat produced in 7 minute is:

    A)  \[11\times {{10}^{3}}cal\]    

    B)  \[22\times {{10}^{3}}cal\]

    C)  \[33\times {{10}^{3}}cal\]    

    D)  \[25\times {{10}^{3}}cal\]

    Correct Answer: B

    Solution :

     \[H=\frac{I_{\upsilon }^{2}RT}{J}cal\] \[=\frac{{{(\sqrt{2})}^{2}}\times 1107\times 60}{4.2}\] \[\left( \because {{I}_{rms}}=\frac{{{I}_{0}}}{\sqrt{2}}=\frac{220/110}{\sqrt{2}}=\sqrt{2} \right)\] \[=22\times {{10}^{3}}cal\]


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