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JEE Main & Advanced Physics Alternating Current / प्रत्यावर्ती धारा Question Bank Alternating Current, Voltage and Power

  • question_answer
    The frequency of an alternating voltage is 50 cycles/sec and its amplitude is 120V. Then the r.m.s. value of voltage is  [BHU 1999; MH CET (Med.) 2001; KCET (Med.) 2001; MH CET 2003]

    A)            101.3V                                    

    B)            84.8V

    C)            70.7V                                       

    D)            56.5V

    Correct Answer: B

    Solution :

               \[{{V}_{rms}}=\frac{{{V}_{0}}}{\sqrt{2}}=\frac{120}{1.414}=84.8\ V\]           


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