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JEE Main & Advanced Physics Electro Magnetic Induction Question Bank Application of EMI (Motor, Dynamo, Transformer)

  • 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 e.m.f. of 210V. When the motor is running at full speed, the current in the armature is                                        [UPSEAT 2002]

    A)            5A 

    B)            105A

    C)            110A                                        

    D)            215A

    Correct Answer: A

    Solution :

               \[i=\frac{E-e}{R}=\frac{220-210}{2}=\frac{10}{2}=5A\]


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