Contents
- 1 What do you mean by sensitivity of a Wheatstone bridge on what factors does it depend?
- 2 How can I increase the sensitivity of a Wheatstone bridge *?
- 3 Which Wheatstone bridge is more sensitive?
- 4 What is sensitivity of meter bridge?
- 5 Why is the Wheatstone bridge more?
- 6 In which condition Carey Foster bridge will be most sensitive?
- 7 What is the sensitivity of Wheatstone bridge equation?
- 8 How many resistors are in a Wheatstone bridge?
What do you mean by sensitivity of a Wheatstone bridge on what factors does it depend?
(i) Relative magnitudes of the resistances in the four arms of the bridge. (ii) Relative position of the galvanometer and battery.
How can I increase the sensitivity of a Wheatstone bridge *?
The sensitivity of the metre bridge can be increased by increasing the current flow through the galvanometer. This is done by reducing the resistance by a particular factor.
What is selectivity of Wheatstone bridge?
Selectivity refers to the characteristics that determine whether a sensor can respond selectively to an analyte or a group of analytes. Detection limit is the lowest concentration of the analyte that can be detected by the sensor under given conditions.
Which Wheatstone bridge is more sensitive?
Wheatstone Bridge is most sensitive when the value of resistances of the four arms of the bridge P, Q, R and S are of the same magnitude.
What is sensitivity of meter bridge?
Sensitivity of metre bridge is the accuracy to measure the value of current. bridge is most sensitive when all resistance are of same order.
What is bridge sensitivity?
The sensitivity of a Wheatstone bridge is defined as the deflection in the galvanometer per unit current. In the unbalanced condition of the bridge, when current flows, it causes the pointer of galvanometer to get deflected. Thus, the deflection rate is the function of sensitivity.
Why is the Wheatstone bridge more?
A Wheatstone’s bridge is more accurate than the other methods of measuring resistance because the resistance is obtained using the null method and is based on Kirchoff’s law. Under this condition, the Wheatstone’s bridge is said to be balanced. …
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. In a meter bridge the Resistances of the two parts of the wire are of the same order as the unknown and known resistances are of the same order.
What is the deflection of the Wheatstone bridge?
Deflection of the galvanometer to the unit fractional change in the value of unknown resistance b. Square of the deflection of the galvanometer to the unit fractional change in the value of unknown resistance c. Deflection of the galvanometer to the twice of the unit fractional change in the value of unknown resistance d.
What is the sensitivity of Wheatstone bridge equation?
Start with the Wheatstone bridge equation from wikipedia which is the subtraction of two voltage dividers. Sensitivity is the derivative with respect to R x. You’ll notice immediately that the voltage divider that doesn’t have the element of interest doesn’t impact the sensitivity at all.
How many resistors are in a Wheatstone bridge?
The Wheatstone Bridge Circuit comprises two known resistors, one unknown resistor and one variable resistor connected in the form of a bridge. This bridge is very reliable as it gives accurate measurements. Wheatstone Bridge Construction Wheatstone Bridge Working Principle Wheatstone Bridge Formula Wheatstone Bridge Applications & Limitations
What are the four arms of the Wheatstone bridge?
The figure below shows the general circuit of the Wheatstone bridge. It consists of 4 arms namely AC, AD, BC and BD each containing resistance R 1, R 2, R 3 and R 4. Here, R 2 is the variable resistance and R 4 is the unknown resistance.