Ohmmeters are electronic measuring instruments used to measure the electrical resistance of components, wires, and circuits. They help determine continuity, detect faults such as open or short circuits, and verify component values during testing and troubleshooting. Ohmmeters operate by applying a small internal voltage to the circuit and measuring the resulting current to calculate resistance. Available as standalone instruments or as a function within multimeters, they come with different measurement ranges and accuracy levels. Ohmmeters are widely used in electronics servicing, industrial maintenance, laboratories, and educational settings, contributing to accurate diagnostics, safe testing, and reliable circuit evaluation.