The image shows a diagram of a telephone earpiece. The main components labeled are: a permanent magnet, leads, a soft iron pole piece, a solenoid, a magnetic alloy diaphragm. The diagram shows the solenoid wrapped around the soft iron pole piece, which is connected to the permanent magnet. The leads connect to the solenoid. The magnetic alloy diaphragm is positioned above the solenoid and magnet. The diagram is labeled as Fig. 40.23. The text adjacent to the diagram discusses the electromagnet formed in the device and mentions a magnetic relay.

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Sat, May 23, 2026, 07:15 AM

28d ago

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The image shows a diagram of a telephone earpiece. The main components labeled are: a permanent magnet, leads, a soft iron pole piece, a solenoid, a magnetic alloy diaphragm. The diagram shows the sol…read more

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