What does the locator receiver's antenna array do when exposed to a varying magnetic field?

• A. Absorb moisture
• B. Generate an electric current
• C. Emit a magnetic field
• D. Emit audible noise

Answer: (B)

When a varying magnetic field passes through the locator receiver’s antenna array, the changing magnetic flux through the conductive loops induces an electric current in the coils. This is Faraday’s law in action: a changing magnetic environment creates an electromotive force that drives current in the conductor. The receiver then detects and processes this induced current to indicate the presence and position of nearby buried conductors. The antenna array isn’t meant to absorb moisture, nor does it emit its own magnetic field or audible noise—the signal it produces is the induced current, which the receiver converts into the location reading or audible cues.