Admin Table of Contents
- 1 What is the working of Carey Foster bridge?
- 2 How do you do Carey Foster bridge experiment?
- 3 Why is Carey Foster bridge so sensitive?
- 4 Why do we use Carey Foster bridge for determination of resistance in PRT experiment?
- 5 What is null point in Carey foster bridge?
- 6 What are the advantages of Carey foster bridge over meter bridge?
What is the working of Carey Foster bridge?
The Carey Foster bridge is an electrical circuit that can be used to measure medium resistances. It works on the same principle as Wheatstone bridge works i.e. operates upon a null indication principle. It was invented by Carey Foster.
How do you do Carey Foster bridge experiment?
The Carey Foster bridge. The thick-edged areas are busbars of almost zero resistance….Use
- Place a known resistance in position Y.
- Place the unknown resistance in position X.
- Adjust the contact D along the bridge wire EF so as to null the galvanometer.
- Swap X and Y.
What is the principle of Carey Foster bridge in which condition Carey Foster bridge will be most sensitive?
Answer: It can be proved that the bridge is most sensitive when all the four Resistances are of the same order.
How does a resistance bridge work?
The Wheatstone bridge works on the principle of null deflection, i.e. the ratio of their resistances are equal and no current flows through the circuit. This condition can be achieved by adjusting the known resistance and variable resistance.
Why is Carey Foster bridge so sensitive?
The Carey Foster bridge is so sensitive because it is used for measuring the smallest decimal change in the resistance. The sensitivity of Carey Foster bridge is proportional to the length of the wire used in the bridge.
Why do we use Carey Foster bridge for determination of resistance in PRT experiment?
Because it’s used to measure the tiniest decimal change in resistance, the Carey Foster bridge is extremely sensitive. The length of the wire used in the Carey Foster bridge determines its sensitivity.
How does the Wheatstone bridge circuit work?
A Wheatstone bridge is a divided bridge circuit used for the measurement of static or dynamic electrical resistance. The equation of the Wheatstone bridge, if R1, R2, R3, and R4 are equal, and a voltage, VIN, is applied between points A and C, then the output between points B and D will show no potential difference.
What is Wheatstone bridge experiment?
The circuit known as a Wheatstone bridge is most commonly used to determine the value of an unknown resistance to an electrical current. The unknown resistance can be identified by studying and manipulating the path of the current take through the Wheatstone bridge grid.
What is null point in Carey foster bridge?
The Carey foster bridge principle is simple and similar to Wheatstone’s bridge working principle. It works on the principle of null detection. That means the ratios of the resistances will be equal and the galvanometer records zero where there is no current flow.
What are the advantages of Carey foster bridge over meter bridge?
Advantages. It gives an accurate measurement of the difference in the resistance. Whenever the Carey Foster bridge is used for measurement, it gives precise results as compared to other equipment. Only one unknown resistance is sufficient to measure the difference.