Answer
Verified
111.6k+ views
Hint: We know that 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. 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 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.
Complete step by step answer
We know that the jockey is used to sliding on the bridge wire. It is a metal rod with one end as a knife edge. Now adjust the value of resistance in the resistance box and slide the jockey along the wire. This process is to be done until the galvanometer shows a zero or null deflection. In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire x cm long. If the length of the potentiometer wire is increased without changing the cell.
It can be said that Constantan is used for meter bridge wire because its temperature coefficient of resistance is almost negligible due to which the resistance of the wire does not change with increase in temperature of the wire due to flow of current. Sensitivity of metre bridge is the accuracy to measure the value of current. a bridge is most sensitive when all resistance is of the same order.
In first case, $\dfrac{R}{S}=\dfrac{60}{100-60}=\dfrac{3}{2}$
In second case, $\dfrac{R}{S}+5=\dfrac{50}{50}=1$ or $R=S+5$
From the first case, $S+\dfrac{5}{S}=\dfrac{3}{2}$ or $2 S+10=3 S$
or $S=10 \Omega$ and $R=10+5=15 \Omega$
Note We know that the Wheatstone bridge works on the principle of null deflection, i.e. the ratio of their resistances is equal and no current flows through the circuit. Under normal conditions, the bridge is in the unbalanced condition where current flows through the galvanometer. The Wheatstone Bridge circuit is nothing more than two simple series-parallel arrangements of resistances connected between a voltage supply terminal and ground producing zero voltage difference between the two parallel branches when balanced. The Wheatstone bridge is used for measuring the very low resistance values precisely. Wheatstone bridge along with an operational amplifier is used to measure the physical parameters like temperature, strain, light, etc.
Complete step by step answer
We know that the jockey is used to sliding on the bridge wire. It is a metal rod with one end as a knife edge. Now adjust the value of resistance in the resistance box and slide the jockey along the wire. This process is to be done until the galvanometer shows a zero or null deflection. In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire x cm long. If the length of the potentiometer wire is increased without changing the cell.
It can be said that Constantan is used for meter bridge wire because its temperature coefficient of resistance is almost negligible due to which the resistance of the wire does not change with increase in temperature of the wire due to flow of current. Sensitivity of metre bridge is the accuracy to measure the value of current. a bridge is most sensitive when all resistance is of the same order.
In first case, $\dfrac{R}{S}=\dfrac{60}{100-60}=\dfrac{3}{2}$
In second case, $\dfrac{R}{S}+5=\dfrac{50}{50}=1$ or $R=S+5$
From the first case, $S+\dfrac{5}{S}=\dfrac{3}{2}$ or $2 S+10=3 S$
or $S=10 \Omega$ and $R=10+5=15 \Omega$
Note We know that the Wheatstone bridge works on the principle of null deflection, i.e. the ratio of their resistances is equal and no current flows through the circuit. Under normal conditions, the bridge is in the unbalanced condition where current flows through the galvanometer. The Wheatstone Bridge circuit is nothing more than two simple series-parallel arrangements of resistances connected between a voltage supply terminal and ground producing zero voltage difference between the two parallel branches when balanced. The Wheatstone bridge is used for measuring the very low resistance values precisely. Wheatstone bridge along with an operational amplifier is used to measure the physical parameters like temperature, strain, light, etc.
Recently Updated Pages
Write an article on the need and importance of sports class 10 english JEE_Main
Write a composition in approximately 450 500 words class 10 english JEE_Main
Arrange the sentences P Q R between S1 and S5 such class 10 english JEE_Main
If x2 hx 21 0x2 3hx + 35 0h 0 has a common root then class 10 maths JEE_Main
The radius of a sector is 12 cm and the angle is 120circ class 10 maths JEE_Main
For what value of x function fleft x right x4 4x3 + class 10 maths JEE_Main
Other Pages
Electric field due to uniformly charged sphere class 12 physics JEE_Main
An aeroplane left 50 minutes later than its schedu-class-11-maths-JEE_Main
Radius of the largest circle which passes through -class-11-maths-JEE_Main
If a wire of resistance R is stretched to double of class 12 physics JEE_Main