Quick Answer: The Resistance Box, Plastic is a plug-type resistance box in a moulded ABS or polycarbonate housing, with non-inductively wound constantan or manganin coils and brass blocks with tapered plugs. Stated accuracy is ±1% to ±2% at 20 °C.
Last updated: October 2026
Key Features
Plug-type, with tapered interchangeable plugs in machined brass blocks
Non-inductively wound constantan or manganin coils
Moulded ABS or polycarbonate housing
Heavy-duty 4 mm brass binding posts
Accuracy ±1% to ±2% at 20 °C
Technical Specifications
Specification
Value
Housing
Moulded ABS / polycarbonate
Coils
Constantan / Manganin, non-inductively wound
Contacts
Brass blocks, tapered plugs
Range
Configurations such as 1 to 5000 ohm
Accuracy
±1% to ±2% at 20 °C
Terminals
4 mm brass binding posts
HS code
9023.00.10
About This Product
Pulling a plug out of the box adds that coil’s resistance to the circuit, so known values can be set for Wheatstone bridge and potentiometer experiments. It is used to measure an unknown resistance and in experiments on the EMF and internal resistance of a cell.
Frequently Asked Questions
How is resistance set on the Resistance Box, Plastic?
It is a plug-type box: tapered plugs fit between brass blocks, and removing a plug brings that coil into the circuit.
