Slide wire Bridge

A slide Bridge 


A slide wire bridge, also known as a meter bridge, is an electrical measuring instrument used to measure unknown resistances by comparing them with known resistances. It works on the principle of Wheatstone bridge.

Key Components

1. Wire: A uniform wire of known resistance per unit length.

2. Jockey: A sliding contact that moves along the wire.

3. Known resistance: A resistor of known value.
4. Unknown resistance: The resistor to be measured.

Working Principle


1. Balancing the bridge: The jockey is moved along the wire until the bridge is balanced, and no current flows through the galvanometer.
2. Calculating resistance: The unknown resistance is calculated using the ratio of the lengths of the wire segments and the known resistance.

Applications

1. Resistance measurement: Slide wire bridges are used to measure unknown resistances accurately.
2. Physics experiments: They are commonly used in physics labs to demonstrate electrical principles.


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