How Does an Ohmmeter Work?
An ohmmeter is an electronic device that measures electrical resistance, such as that of a circuit component. Electrical resistance is a measure of how much an object resists allowing an electrical current to pass through it. Determining electrical resistance can be useful in engineering, to determine how much energy must be supplied to a circuit in order to get it to work as desired. Ohmmeters come with different levels of sensitivity–some are designed to measure low-resistance materials, while others measure higher resistance. Ohmmeter Function An ohmmeter functions by passing a constant current or voltage though an object, such as voltage from a battery, and then measuring the resulting voltage with an ammeter after it passes through the resistance. The higher resistance the material has, the less current will pass through it. An ohmmeter is typically not used to measure resistance across an entire circuit, but rather through different parts of the circuit, although it can be used
