Quick Answer: The Portable Wheatstone Bridge Apparatus is a physics instrument for measuring an unknown electrical resistance by balancing a bridge circuit, in a portable format for resistance comparison.
Last updated: October 2026
Key Features
Measures unknown resistance by comparison with known resistance values.
Demonstrates the Wheatstone bridge balance condition.
Lets students study bridge balance, null deflection and resistance ratio.
Portable format supports classroom movement and compact lab storage.
Can be used with a compatible galvanometer, resistance box, cell and connecting leads.
About This Product
Students connect the known resistance, unknown resistance, cell, key and galvanometer, then adjust the bridge arms or sliding contact until the galvanometer shows null deflection. The balance condition and known values are recorded, and the unknown resistance is worked out from the Wheatstone bridge relation. Repeating the run with different resistance values acts as a check. It serves as a portable Wheatstone bridge experiment kit for current electricity practicals and introductory electronics lessons. The Portable Wheatstone Bridge Apparatus is available for supply within India and for export to Vietnam, Zambia, Australia, Laos, Nicaragua and Indonesia.
Frequently Asked Questions
Q1. How is the balance point found? Adjust the bridge arms or sliding contact until the galvanometer shows null deflection. At that point the bridge is balanced, and the unknown resistance is calculated from the known values using the Wheatstone bridge relation.
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