A meter bridge is an electrical instrument which is used to determine the resistance of a given conductor. The meter bridge consists of a long meter bridge wire which is of 1m length and the meter bridge has two different section which is left and right sections..
People also ask, what is the 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.
Similarly, why is it called a meter bridge? Explanation: The reason why this bridge is called as Meter Bridge is because of the fact that it works on the Wheatstone bridge's principle. So, people also popularly call it as Wheatstone's meter bridge. Another thing is that the wire length used in this circuit is of 1 meter, so it has got its name as a meter bridge.
Moreover, how does a meter bridge work?
The meter bridge principle is based on the Wheatstone Bridge circuit which says that if at any point or length (of a wire), the ratio of two resistances (say R1 and R2) is equal to the ratio of another two resistances (say R3 and R4 where R4 is the unknown resistance), then there shall be no flow of current at that
What is the difference between potentiometer and meter bridge?
A meter bridge is an electric device used for measuring an unknown resistance. A potentiometer is an electric device used to measure the emf and internal resistance of a cell, to compare emf of two cells and a potential difference between two points in an electric circuit.
Related Question Answers
Which wire is used in meter bridge?
The material of wire used in meter bridge is made of manganin or eureka due to there high specific resistance or resistivity. Thick copper strips are used in meter bridge because copper is a good conductor of electricity.What is the working principle of Metre bridge?
What is the principle of a meter bridge? A Meter Bridge is also called as slide wire bridge and is an instrument that works on the principle of a Wheatstone bridge. A meter bridge is used to find the unknown resistance of a conductor as that of in a Wheatstone bridge.What is null point in Metre bridge?
In a meter bridge experiment null point is found at a distance of 33.7from one end .If a 12 ohm resistor is connected in parallel with unknown resistance 10 null point is shift to 51.9 .What is the formula of Metre bridge?
The length AD= l1 and DC = (100-l1). Resistance of AD=Rcml1, where Rcm is the resistance of the wire per unit centimetre. Resistance of DC=Rcm (100-l1). The four arms AB, BC, DA and CD [with resistances R, S, Rcm l1 and Rcm (100-l1)] form a Wheatstone bridge with AC as the battery arm and BD the galvanometer arm.Why manganin wire is used in meter bridge?
Manganin foil and wire is used in the manufacture of resistors, particularly ammeter shunts, because of its virtually zero temperature coefficient of resistance value and long term stability. It is because, an alloy has high resistivity and a low value of temperature coefficient of resistance.How do you increase the sensitivity of a meter bridge?
The sensitivity of the meter bridge is at the peak when all resistors have the same order. It can be increased by making sure that the current in the galvanometer is very high. This can in turn be done by lessening the values of the resistors that are used in the instrument.Who discovered meter bridge?
The Concept of Wheatstone Bridge Out of the two, one of the legs is an unknown component which was invented by Samuel Hunter Christie in the year 1833 and later, it improved and popularized by Sir Charles Wheatstone in the year 1843.Why do we use thick copper strips in meter bridge?
(a) The connections between the resistors in a meter bridge are made of thick copper strips because the resistivity of the copper wire is very low. As, the connections are thick, so the area become very large and the resistance of eh wires become almost negligible.What is end error in meter bridge?
The shifting of zero of the scale at different points as well as the stray resistance give rise to the end error in meter bridge wire. This error arise due to the non uniformity of the meter wire End corrections can be estimated by including known resistances P1 and Q1 in the two ends and finding the null point.What do you mean by resistance?
Resistance is the opposition that a substance offers to the flow of electric current. When an electric current of one ampere passes through a component across which a potential difference (voltage) of one volt exists, then the resistance of that component is one ohm.What are the limitations of Wheatstone bridge?
Limitation of Wheatstone bridge: “It is not susceptible to high dc current.” “It may give inaccurate readings if not balanced.” “The Wheatstone bridge measures resistance from few “ohms” to “megohms.”What is potential meter?
The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an implementation of the same principle, hence its name. Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment.What are the uses of meter bridge?
This device is a practical application of Wheatstone bridge used for measuring an unknown resistance and for comparing two unknown resistances. It consists of one metre long straight and uniform wire manganin or constantan, stretched on a wooden board.What is the use of jockey in meter bridge?
Metre Bridge apparatus The terminal B between the gaps is used to connect galvanometer and jockey.What happens when a Wheatstones meter bridge network is balanced?
When balanced, the Wheatstone bridge can be analysed simply as two series strings in parallel. When this happens, both sides of the parallel bridge network are said to be balanced because the voltage at point C is the same value as the voltage at point D with their difference being zero.Why galvanometer shows no deflection in potentiometer?
Galvanometer shows opposite deflection in potentiometer because of the following reasons : The potential difference between the ends of the potentiometer wire or the emf of the cell connected in the main circuit may not be greater than the emf of the cells whose emf are to be compared .What is balancing length in meter bridge?
In a meter bridge , the balancing length from left end is found to be 20 cm . ( Standard resistance of one ohm is in the right gap). What is the value of unknown resistance ?How do you find the resistance of a wire using a meter bridge?
Cut the resistance wire at the points where it leaves the terminals, stretch it and find its length by using a metre scale. Measure the diameter of the wire at least at four places, in two mutually perpendicular directions at each place with the help of screw gauge. Record your observations as given in tables.Why the instrument is called PO box?
The box containing Wheatstone bridge was used in the United Kingdom by engineers in General Post Office, who used it in UK telecommunications to trace electrical faults. Therefore, for historical reasons it was named “Post office box” as it was carried by post office engineers. 
