10th Class Science Sample Paper Science Sample Paper-4

  • question_answer Which of the following is true about an electric motor?

    A) The direction of current in the coil changes once in each two rotations

    B) The direction of current in the coil changes once in each half rotations

    C) The direction of current in the coil changes once in each one rotations

    D) The direction of current in the coil changes once in each one-fourth rotations

    E) None of these

    Correct Answer: B


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