5X 0-99999.9 Ohm Simple Resistance Box Precision Variable Decade Resistor Teaching Instrument Teaching Resistance Box,5 x Resistance Box,Black

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