3X 0-99999.9 Ohm Simple Resistance Box Variable Decade Resistor Teaching Instrument Teaching Resistance Box,3 x Resistance Box,Black

Used to measure unknown resistance. Used as an additional resistor to expand the range of volts. Used as a known resistor in the circuit to regulate the required current. Used for physical electricity experiment teaching. Used as electromotive force and internal resistance for measuring power supply. Can be part of the circuit Ohm's law.