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The effect on the force on the wire when current changes direction in a earbud.
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Explanation of Solution
Introduction:
When
A conductor carrying current generates its own magnetic field. When placed in another magnetic field a force is exerted on the wire because of the interaction between the magnetic field and the field generated by the current carrying wire. The direction of the force is determined by Fleming’s left hand rule as shown below.
In an ear bud, the force on a coil caused by the magnetic field pushes the coil inwards and outwards depending on the current. Such motion causes the coil to vibrate which creates vibration in the air perceived as sound by the ear.
Conclusion:
In an ear bud the force on a coil caused by the magnetic field pushes the coil inwards and outwards depending on the current. Such motion causes the coil to vibrate which creates vibration in the air perceived as sound by the ear.
Chapter 24 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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