Quick Answer:The Resistance Substitution Box is a compact switched resistance box holding 12 resistors with preferred values from 100 Ω to 470 Ω, selected by a rotary switch and connected through two non-polarised 4 mm terminals.
Last updated: 18 October 2026
Key Features
12 resistors of preferred values on a printed circuit.
Rotary switch selects the value.
Two 4 mm yellow terminals; the colour indicates non-polarity.
Housed in a robust black plastic box.
Technical Specifications
Specification
Value
Number of resistors
12
Range
100 Ω – 470 Ω (preferred values)
Selection
Rotary switch
Terminals
Two 4 mm, yellow (non-polar)
Housing
Black plastic box
How It Is Used
The box is wired into a circuit in place of a fixed resistor, and turning the switch steps through the values so students can see how current or voltage changes with resistance.
Frequently Asked Questions
How many resistance values does the Resistance Substitution Box offer?
It contains 12 resistors with preferred values in the range 100 Ω to 470 Ω, chosen with a rotary switch.
Laboratories and education suppliers in Trinidad and Tobago, Yemen, North Macedonia, New Zealand and Moldova can source the Resistance Substitution Box from JLab India for export.
For a quotation on the Resistance Substitution Box, contact JLab India on +91-8569909696.
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