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JEE Main & Advanced Physics Alternating Current / प्रत्यावर्ती धारा Question Bank Critical Thinking

  • question_answer
    In the adjoining figure the impedance of the circuit will be

    A)            120 ohm

    B)            50 ohm

    C)            60 ohm

    D)            90 ohm

    Correct Answer: C

    Solution :

                       \[{{i}_{L}}=\frac{90}{30}=3\ A,\]   \[{{i}_{C}}=\frac{90}{20}=4.5\ A\]                    Net current through circuit \[i={{i}_{C}}-{{i}_{L}}\ =1.5\ A\]            \[\therefore Z=\frac{V}{i}=\frac{90}{1.5}=60\Omega \]


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