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

  • question_answer
    A \[100\text{ }\Omega \]resistor is connected to a 220 V, 50 Hz AC supply. The rms value of current in the circuit is:

    A) 1.56 A                          

    B) 1.56 mA

    C) 2.2 A               

    D) 2.2 mA

    Correct Answer: C

    Solution :

    (c) 2.2A Here, \[R=100\,\Omega ,\,{{V}_{rms}}=220\,V,\,v=50\,Hz\] \[\therefore {{l}_{rms}}=\frac{{{V}_{rms}}}{R}=\frac{220}{100}=2.2\,A\]


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