2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Alternating Current / प्रत्यावर्ती धारा

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

  • question_answer
    In an ac circuit, the current is given by \[i=5\sin \,\left( 100\,t-\frac{\pi }{2} \right)\] and the ac potential is\[V=200\sin \,(100)\,volt.\] Then the power consumption is  [CBSE PMT 1995; MH CET 1999; CPMT 2002]

    A)            20 watts                                 

    B)            40 watts

    C)            1000 watts                            

    D)            0 watt

    Correct Answer: D

    Solution :

                       \[P=Vi\cos \varphi \]            Phase difference \[\varphi =\frac{\pi }{2}\Rightarrow P=zero\]


You need to login to perform this action.
You will be redirected in 3 sec spinner