Physics
WAEC 2021
The following statements about a loudspeaker are correct except?
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A.
its contains a permanent magnet.
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B.
sound signal converted to varying current signal enters the speech coil.
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C.
the current in the speech coil creates a magnetic force on the coil.
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D.
the magnetic force on the speech coil is uni-directional.
Correct Answer: Option A
Explanation
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