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NEET Sample Paper NEET Sample Test Paper-74

  • question_answer
    If a resistance coil is made by joining in parallel two resistances each of \[10\,\Omega \]. An emf of 1.0 V is applied between two ends of coil for 5 min. The heat produced in calories will be

    A)  10.3 cal                       

    B)  14.3 cal             

    C)  16.3 cal                       

    D)  18.3 cal

    Correct Answer: B

    Solution :

    As two resistances are in parallel combination So, the effective resistance \[R'=\frac{10\times 10}{10+10}=5\,\Omega \] Heat produced \[=\,\,\frac{{{V}^{2}}}{R'}\times t=\frac{{{1}^{2}}}{5}\times 5\times 60\,J=\frac{60}{4.2}\,\,cal\] \[=\,\,14.3 cal\]


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