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
    If instantaneous current is given by \[i=4\cos \,(\omega \,t+\varphi )\] amperes, then the r.m.s. value of current is                    [RPET 2000]

    A)            4 amperes                             

    B)            \[2\sqrt{2}\] amperes

    C)            \[4\sqrt{2}\] amperes      

    D)            Zero amperes

    Correct Answer: B

    Solution :

               \[{{i}_{r.m.s.}}=\frac{{{i}_{o}}}{\sqrt{2}}=\frac{4}{\sqrt{2}}=2\sqrt{2}\ ampere\]


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