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12th Class Physics Alternating Current / प्रत्यावर्ती धारा Question Bank MCQ - Alternating Currents

  • question_answer
    An alternating current generator has an internal resistance \[{{R}_{g}}\] and an internal reactance \[{{X}_{g}}\]. It is used to supply power to a passive Load consisting of a resistance \[{{R}_{g}}\] and a reactance \[{{X}_{L}}\]. For maximum power to be delivered from the generator to the load, the value of \[{{X}_{L}}\] is equal to: (NCERT EXEMPLAR)

    A) zero                  

    B) \[{{X}_{g}}\]     

    C) \[-{{X}_{g}}\]                          

    D) \[{{R}_{g}}\]

    Correct Answer: C

    Solution :

    (c) \[-{{X}_{g}}\] For maximum power to be delivered from the generator to the load, the total reactance must vanish. i.e.,      \[{{X}_{L}}+{{X}_{g}}=0\] or \[{{X}_{L}}-{{X}_{g}}\]


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