What is meter bridge and its principle?
A meter bridge is an electrical apparatus using which we can measure the value of unknown resistance. It is made using a metre long wire of uniform cross-section. This wire is either nichrome or manganin or constantan. The principle of working of a meter bridge is the same as the principle of a Wheatstone bridge.
What is meter bridge in Physics 12?
The metre bridge, also known as the slide wire bridge consists of a one metre long wire of uniform cross sectional area, fixed on a wooden block. A scale is attached to the block. Two gaps are formed on it by using thick metal strips in order to make the Wheat stone’s bridge.
What is the main aim of meter bridge experiment?
METRE BRIDGE – 1 AIM:- To find the resistance of the given wire using meter bridge and hence determine the specific resistance of its material. APPARATUS: A meter bridge, galvanometer, one way key, a resistance box, a battery jockey, unknown resistance wire about 1 meter long, screw gauge and connecting wires.
Why it is called meter bridge?
The reason why this bridge is called the Meter Bridge is because of the fact that it works on the Wheatstone bridge’s principle. So, people also popularly call it Wheatstone’s meter bridge. Another thing is that the wire length used in this circuit is 1 meter, so it has got its name as a meter bridge.
What is meter bridge formula?
∴ Hence the unknown resistance X can be determined by using the formula X = R(lX100−lx) . Note: Slide wire is known as a meter bridge. The meter bridge is an instrument that works on the principle of the Wheatstone bridge.
What is meter bridge?
A meter bridge also called a slide wire bridge is an instrument that works on the principle of a Wheatstone bridge. A meter bridge is used in finding the unknown resistance of a conductor as that of in a Wheatstone bridge.
Why is it called meter bridge?
A meter bridge works on the principle of Wheatstone’s network and is known as Wheatstone’s meterbridge. The length of the wire used is one meter, so it is called meterbridge.
What are the applications of metre bridge?
The metre bridge is a device which is a practical application of Wheatstone bridge used for measuring an unknown resistance and for comparing two unknown resistances. Potentiometer is a three terminal resistor with sliding or moving contact. It provides resistance/opposition to the flow of current current.
Who invented metre bridge?
The Wheatstone bridge was invented by Samuel Hunter Christie (sometimes spelled “Christy”) in 1833 and improved and popularized by Sir Charles Wheatstone in 1843. One of the Wheatstone bridge’s initial uses was for soil analysis and comparison.
What is the balance point in metre bridge?
Expert-verified answer A balance point in meter bridge is a point where the galvanometer shows zero/null deflection.
How does meter bridge measure resistance?
The metre bridge, also known as the slide wire bridge consists of a onemetre long wire of uniform cross sectional area, fixed on a wooden block. The specific resistance or resistivity of the material of the wire can be then calculated by using the relation, ; Where L be the length of the wire and r be its radius.
What is jockey in meter bridge?
Answer: jockey is the movable instrument where you can find balancing length in metre bridge.
What is a meter bridge?
A meter bridge also called a slide wire bridge is an instrument that works on the principle of a Wheatstone bridge. A meter bridge is used in finding the unknown resistance of a conductor as that of in a Wheatstone bridge.
What is the resistance of a meter bridge instrument?
The below figure is the diagram of a useful meter bridge instrument. In the above figure, R is called as the Resistance, P is the Resistance coming across AB, S is the Unknown Resistance, Q is the Resistance between the joints BD.
How to find the balance point of a meter bridge?
The point where the galvanometer gives null deflection is the balance point of the meter bridge for the given unknown resistance. 7. Measure the distance between point A and the balance point of a given wire using an ordinary meter scale and radius of the wire using a screw gauge (Take at least five readings for both the quantities).
What is p q = r s a meter bridge?
This condition arises when, P Q = R S A meter bridge has a 1 m long wire of uniform cross-section area, which is stretched tight. Between two metal strips which are bent at right angles, this wire is then carefully clamped, as shown in the diagram below: