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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2009

  • question_answer
    A L-R circuit consists of an inductance of 8 mH and a resistance of \[4\,\Omega \]. The time constant of the circuit is

    A)  2ms                      

    B)         12ms

    C)  32ms                   

    D)         500 s

    Correct Answer: A

    Solution :

    \[L=8mH=8\times {{10}^{-3}}H\] \[R=4\Omega \] Time constant of \[L-R\] circuit                 \[=\frac{L}{R}=\frac{8\times {{10}^{-3}}}{4}\]                 \[=2\times {{10}^{-3}}s\].                 \[=2ms\].


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