Wheatstone bridge & its logic | Electric current | Physics | Khan Academy
Channel: Khan Academy India - English
Date: 2020-08-23

Wheatstone bridge is a special circuit consisting of 5 resistors. When the resistances in the adjacent arms have the same ratio, no current flows through the middle resistor! This is called a balanced Wheatstone bridge. 
It's used in calculating unknown resistances using a meter-bridge set up. 

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