In electronic circuits, DC voltages can be...

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Question 1 of 205eccefa3bacbc34ba4d47e49

In electronic circuits, DC voltages can be positive (+) or negative (-) when measured with respect to a certain physical reference point? What would be an example or examples of such a reference point? Analog or digital circuitry 'common' bus or PCB 'common' trace. Chassis, console frame, or hull 'ground'.

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🔍 Key Concepts

• DC reference point (common/ground) in electronic circuits • Difference between signal common (circuit return) and chassis/hull ground • What it means to measure a voltage "with respect to" a point

💭 Think About

• Ask yourself: When you connect a voltmeter to a circuit, what does the black lead connect to, and can that be either a circuit common or the metal chassis? • Consider whether a DC voltage can be defined relative to any stable reference point, or only one specific type of reference in the system. • Think about marine electronics: do instruments ever reference their signals to a PCB/common bus and separately bond to the hull or chassis?

✅ Before You Answer

• Verify that both circuit common and chassis/hull ground can serve as a reference point for measuring voltage, depending on how the system is designed. • Check whether the question is asking for an example of a reference point or the only correct reference point. • Make sure you understand that a voltage is always measured between two points, not at a single point by itself.

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