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JEE Main & Advanced Physics Electro Magnetic Induction Question Bank Self Evaluation Test - Electromagnetic Induction

  • question_answer
    A motor having an armature of resistance \[2\Omega \]. Is designed to operate at 220 V mains. At full speed, it develops a back emf of 210V. When the motor is running at full speed, the current in the armature is:

    A) 3 A  

    B) 5 A  

    C) 7A  

    D) 10A

    Correct Answer: B

    Solution :

    [b] \[I=\frac{{{e}_{1}}-{{e}_{2}}}{R}=\frac{220-210}{2}=5A\]


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