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Question
The direction of rotation of a DC motor, as shown below, is in the clockwise direction.
The direction of the magnetic field is ___.
The direction of rotation of a DC motor, as shown below, is in the clockwise direction.
The direction of the magnetic field is ___.
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Solution
The correct option is B right to left
If the loop is rotating clockwise, the left arm is moving vertically upwards. So, the thumb of your left hand will point upwards. The direction of the current will be away from you, so your middle finger will point away from you. The forefinger now gives us the direction of the magnetic field, which is from right to left.
right to left
If the loop is rotating clockwise, the left arm is moving vertically upwards. So, the thumb of your left hand will point upwards. The direction of the current will be away from you, so your middle finger will point away from you. The forefinger now gives us the direction of the magnetic field, which is from right to left.
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