The metre bridge, also referred to as a slide wire bridge, is a device that operates based on the Wheatstone bridge principle. This apparatus is utilized to ascertain the unknown resistance of a conductor. This article will guide you through an experiment on how to measure the resistance of a given wire using a metre bridge and how to calculate the resistivity of its material.
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Why is the metre bridge called so?
It is called a metre bridge because the bridges use one-meter long wire.
What is the null point?
Null point is defined as the point at which a galvanometer reads 0 deflections.
Why is the bridge method better than the Ohms law of measurement?
Bridge method is better than the Ohms law of measurement because of the null method.
What is the range of measurement of resistance using a Wheatstone bridge?
The resistance measurement range using a Wheatstone bridge is between 1Ω to a few megaohms.
How can a Wheatstone bridge be used for the measurement of physical parameters?
Wheatstone bridge is used to measure the physical parameters like temperature, light, etc, using an operational amplifier and rectifiers are used for the conversion of A.C to D.C.