What is a continuity test and what does a beep indicate?

• A. Measures the inductance of a wire.
• B. Verifies a continuous conducting path; a beep indicates continuity (low resistance).
• C. Detects the presence of a magnet.
• D. Shows the circuit's impedance at high frequency.

Answer: (B)

Continuity testing checks whether two points are connected by a continuous conducting path with no breaks. A tester sends a small current and waits to hear a signal; if there is a complete path, current flows and the device beeps, showing low resistance. That beep means the circuit is continuous. If there’s a break anywhere, current can’t flow and there’s no beep, indicating an open circuit. Some testers also display a resistance value, and the beep threshold varies by tool, but the essential idea is that a beep signals a conducting path exists. Remember to power down the circuit before testing to avoid damage or misleading readings.