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What causes sparking in an electric buzzer?

Updated: 8/20/2019
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10y ago

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The buzzer work with a magnetic coil that attractes the armature thus interrupting the current. This happens repeatedly to cause the buzz.

When the current is interrupted the action of the coil produces a voltage that tries to maintain the current, and that causes a spark between the switch contacts.

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10y ago
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Q: What causes sparking in an electric buzzer?
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