When performing a continuity check with a multimeter on a suspected open circuit, what reading confirms continuity and what indicates a fault?

When performing a continuity check with a multimeter on a suspected open circuit, what reading confirms continuity and what indicates a fault?

• A. A continuity beep or very low resistance (<1 Ω) confirms continuity.
• B. A loud spark confirms continuity.
• C. Infinite resistance confirms continuity.
• D. Any resistance indicates continuity.

Answer: (A)

Continuity testing checks for a complete conducting path. When the two points are connected by a good conductor, the resistance is very low, and a modern multimeter will usually beep to signal continuity (often with a reading well under 1 ohm). If the circuit is open or there’s a fault, the resistance appears very high or infinite, and there’s no beep. A spark is not a reliable or safe way to verify continuity, and any nonzero resistance isn’t automatically continuity—the reading must be very low, within the meter’s continuity threshold.

Continuity testing checks for a complete conducting path. When the two points are connected by a good conductor, the resistance is very low, and a modern multimeter will usually beep to signal continuity (often with a reading well under 1 ohm). If the circuit is open or there’s a fault, the resistance appears very high or infinite, and there’s no beep. A spark is not a reliable or safe way to verify continuity, and any nonzero resistance isn’t automatically continuity—the reading must be very low, within the meter’s continuity threshold.