Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2006

  • question_answer
    Capacitors are used for

    A)  AC                                        

    B)  DC

    C)  Both AC and DC              

    D)  None of these

    Correct Answer: A

    Solution :

    Capacitive reactance \[({{X}_{C}})=\frac{1}{C\omega }\] For direct current, \[\omega =0\] \[\therefore \]  \[{{X}_{C}}=\frac{1}{C\times 0}=\infty \] Therefore, capacitors cannot be used for DC and used for only AC.


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