Wheatstone Bridge

Direct Current Circuits Out of Balance Wheatstone Bridge INTRODUCTION: The most accurate measurements of resistance are made with a galvanometer (or a voltmeter) in a circuit called a Wheatstone bridge, named after the British physicist Charles Wheatstone. This circuit consists of three known resistances and an unknown resistance connected in a diamond pattern. A DC voltage is connected across two opposite points of the diamond, and a galvanometer is bridged across the other two points. …

…stance. This concept has its advantages where the bridge can determine small resistance change. Hence, that even the slightest change in resistance that a normal meters could not detect, could be identified by the out-of-balance voltage. This experiment presents its usefulness for various uses of future electrical circuits. REFERENCE: 1. EDWARDS, D; HACKER, C (2001), Physics and Instrumentation Laboratory Manual, Griffith University. 2. EDWARDS, D; HACKER, C (2001), Physics and Instrumentation Lecture Notes, Griffith University