Which device’s performance can be checked with resistance measurements?

Measuring electrical resistance is a fundamental method used in troubleshooting and verifying the integrity of various electrical components. Each of the devices mentioned has specific characteristics that can be evaluated through resistance measurements.

Capacitors, while primarily evaluated based on their capacitance, can also be tested for insulation resistance or leakage current. If a capacitor exhibits low resistance when disconnected from a circuit, it could indicate that the capacitor is failing or has degraded.

Indicators, such as LED lights, can be checked for continuity and condition using resistance measurements. If an indicator is meant to light up under certain conditions and does not, measuring the resistance can help determine if the indicator is functioning correctly or if there is an open circuit.

Relays are electromechanical switches that can be tested for their coil resistance. By measuring the resistance of the relay coil, one can determine if the coil is intact and working properly. An open coil would indicate a failure, preventing the relay from operating.

Given that all these devices’ functionality and health can be assessed through resistance measurements, the correct choice encompasses the idea that each component can be tested using this method, confirming its operational status.