In electrical drawings, what does a relay coil symbol indicate?

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Multiple Choice

In electrical drawings, what does a relay coil symbol indicate?

The coil symbol in a relay drawing represents the electromagnet that operates the switch contacts. When current flows through the coil, it creates a magnetic field that pulls the relay’s armature, causing the contacts to change state (close or open). This coil is the control element of the relay, while the actual contacts are drawn separately and show whether they’re normally open or normally closed and how they switch when the coil is energized. The symbol is not a resistor in series with the coil, nor is it a power supply, nor does it represent the contacts themselves—those are depicted as the switch symbols tied to the coil’s action. Recognizing the coil helps you understand what part of the relay is energized to make or break the circuit.

The coil symbol in a relay drawing represents the electromagnet that operates the switch contacts. When current flows through the coil, it creates a magnetic field that pulls the relay’s armature, causing the contacts to change state (close or open). This coil is the control element of the relay, while the actual contacts are drawn separately and show whether they’re normally open or normally closed and how they switch when the coil is energized. The symbol is not a resistor in series with the coil, nor is it a power supply, nor does it represent the contacts themselves—those are depicted as the switch symbols tied to the coil’s action. Recognizing the coil helps you understand what part of the relay is energized to make or break the circuit.

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