Textbook ExpertVerified Tutor
15 Jan 2022
Given information
It is given that :
A Wheatstone bridge has 4 resistance .
They are:
The bridge is balanced and current through ammeter is 0
Step-by-step explanation
Step 1.
A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two arms of a bridge circuit, one arm of which includes the unknown component.
The following condition exists when the current through an ammeter is zero,
From this the unknown resistance is determined by using the formula:
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