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In order for a light bulb to be turned on in a circuit, it must have what kind of switch?
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In order for a light bulb to be turned on in a circuit, it must have what kind of switch?

User Clarence Fredericks
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Answer:

Both switches must be closed in order for the circuit to be complete and for the bulb to light. (This would indicate the 'armed' status of this burglar alarm.) Magnetic switches come in 2 varieties - "Normally Closed" and "Normally Open". These 2 terms describe the state of the switch when it is NOT being controlled by the magnet.

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User Frank Wiles
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