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The following statements about a loudspeaker are correct except?        

Physics
WAEC 2021

The following statements about a loudspeaker are correct except?        

  • A. its contains a permanent magnet.     
  • B.  sound signal converted  to varying current signal enters the speech coil.       
  • C.   the current in the speech coil creates a magnetic force on the coil.        
  • D. the magnetic force on the speech coil is uni-directional.
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Correct Answer: Option D
Explanation

The magnetic force on the voice coil is bi-directional, allowing it to move back and forth, producing sound waves.

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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