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Standard X

Physics

Power Generator

If the ends o...

Question

If the ends of a wire loop are attached to two half-circular metal strips, arranged so that the two strips almost form a complete circle, and those strips are contacted by two "brushes" which connect to opposite poles of a battery, what polarity of voltage will be measured as the loop is rotated counter-clockwise?

Right Postive, Left Negative

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Right Negative, Left Positive

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There is actually no current.

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Can’t be determined

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Solution

The correct option is A
Right Postive, Left Negative

As the loop is moving anticlockwise, using Fleming’s left-hand rule we can determine that the current in the loop of wire is flowing anticlockwise. Therefore the polarity must be
Right - Positive
Left - Negative

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The correct option is A Right Postive, Left Negative As the loop is moving anticlockwise, using Fleming’s left-hand rule we can determine that the current in the loop of wire is flowing anticlockwise. Therefore the polarity must be Right - Positive Left - Negative

The correct option is A
Right Postive, Left Negative

As the loop is moving anticlockwise, using Fleming’s left-hand rule we can determine that the current in the loop of wire is flowing anticlockwise. Therefore the polarity must be
Right - Positive
Left - Negative