Question

Meter Bridge or Slide Wire Bridge is a practical form of

Answer 1

Hint: The Slide Wire Bridge meter bridge is also known. It comprises a wire of one-meter length and a uniform cross-sectional area. The cable now extended to a meter. The bridge features two metal stripes, either side of the wire in an L shape. These metal bands work as wire holding. The cable is attached to the bands. These two metal strips consist of metals such as copper. The bridge consists of a metal band between the two strips, which has a distance between them. So, on the bridge, there are altogether five leads. Meter bridge is the easiest use of the Wheatstone Bridge for unknown resistance measurement.

Complete answer:
The Meter Bridge is a compact form of the Wheatstone Bridge.
Meter Bridge is a tool used to detect a coil or another material's unknown resistance. This bridge is based on the Wheatstone Bridge idea. We know that the Wheatstone Bridge is used to measure the unknown circuit resistance. It comprises four resistors, two resistors of which are known, one variable and one undetermined. There is also a galvanometer. The bridge contains two parallel series resistance configurations.
Additional information:
By balancing two legs in the bridge circuit, the Wheatstone bridge, also called the resistance bridge, calculates unknown resistance. One leg has an undetermined strength component. The Wheatstone Bridge was invented by Samuel Hunter Christie in 1833 and afterward popularized by Sir Charles Wheatstone in 1843. Two known resistors, an unknown resistor and a variable resistor coupled in the bridge, form part of the Wheatstone Bridge circuit. This bridge provides exact measurements and is highly reliable.


Note: Errors and safeguards with meter bridge:
Possible mistakes:
Non-uniformity of the wire produces various unit length resistors, leading to errors of unfamiliar strength. In addition, due to the heating impact inaccuracies, end corrections may occur because the scale zero has shifted.
Safety measures:
Before the contact galvanometer formed on a bridge wire, the battery key should always press to guarantee a constant current flow through the system. If not, a counter emf will induct somewhere in the circuit, which would prevent the exact balance point from being found.
The experiment should repeat by exchanging the left-hand and right-hand resistance.
The resistance value is such that towards the wire center, the balance condition is achieved.