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

  • question_answer
    A 40 W electric heater is connected to a 200 V, 50 Hz mains supply. The peak value of electric current flowing in the circuit is approximately                                            [MP PET 1992]

    A)            2.5 A                                        

    B)            5.0 A

    C)            7 A

    D)            10 A

    Correct Answer: C

    Solution :

               \[{{i}_{r.m.s.}}=\frac{{{V}_{r.m.s.}}}{R}=\frac{200}{40}=5\ A\]  Þ\[{{i}_{0}}={{i}_{r.m.s.}}\sqrt{2}=7.07\ A\]


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