What does the receiver do with the induced voltage?

• A. Stores it in memory
• B. Transforms it into an optical signal on the meter and an audio signal on headphones/speaker
• C. Converts to heat
• D. Scatters it as light

Answer: (B)

When the receiver picks up the voltage induced in a buried line, its job is to turn that electrical signal into something you can read and hear. The electronics amplify and process the induced voltage and present it as a visual readout on the meter (often an optical indicator) and as an audible signal through headphones or a speaker. This dual output lets you trace the line by following changes in the meter reading and the sound as you move the receiver along the suspected path.

It isn’t stored as memory, isn’t converted into heat, and isn’t scattered as light—those options wouldn’t provide the practical tracing feedback you need.