The potentiometer is an electric component used to measure the electromotive force. The three terminal resistor has resistance that is used to control the flow of the electric current. Out of the three terminals the two terminals are fixed and the one terminal is variable. The two fixed terminals are attached to the ends of a resistive element while the variable terminal is attached to the sliding wiper. This wiper moves around the resistive element and varies the potentiometer resistance. Depending on the resistive element either flat or angled, the wiper moves accordingly in a linear or rotary manner. Various materials are used to construct the resistive element of potentiometer that includes carbon particles in in plastic, resistive wires, cermets (mix of metals and ceramics) and graphite. The working principle of the potentiometer is based on the fact that the decrease in the potential in any portion of the wire is directly proportional to the length of the wire, provided that the...