Quick Answer:The Resistance Box 50 Ohms is a plug-type box for low resistances, 1 to 50 Ω, using non-inductively wound coils and interchangeable tapered plugs in precision-machined brass blocks.
Last updated: 18 October 2026
Key Features
Low-resistance range from 1 Ω to 50 Ω.
Plug-type selection with interchangeable tapered plugs.
Precision-machined brass blocks.
Tight tapered fit keeps contact resistance low.
Non-inductive coil winding.
Technical Specifications
Specification
Value
Range
1–50 Ω (cumulative)
Type
Plug type
Coils
Non-inductively wound resistance wire
Contacts
Brass blocks, interchangeable tapered plugs
How It Is Used
Removing plugs adds the matching coils in series, giving known low resistances in discrete steps. This laboratory resistance box is used as the known arm when balancing a Wheatstone bridge to find an unknown resistance, and for Ohm’s law and series–parallel experiments.