What is Ohmmeter explain its working principle with diagram?

An ohmmeter is an electrical device used to measure resistance in ohms. It operates by applying a small voltage to a resistor and measuring the current that flows through it, according to Ohm's Law (V = I × R). The resistance value is then calculated by rearranging the formula to R = V/I. A typical diagram would show the ohmmeter connected to the resistor with a display indicating the measured resistance value.