Why should we get the null point in the middle of the Metre bridge wire?

The meter bridge is the most sensitive when the four resistors that form the Wheatstone Bridge are equal. This is possible only when the balance point is somewhere near the middle of the wire.

Related Questions

Read More:

Wheatstone Bridge – Important Topics
Ohm’s law	Relation between kva and kw	Internal resistance formula
Types of Circuits	Difference between air conditioning and refrigeration	Voltage
Current	Difference between kva and kw	Electrical Formula
Electric Dipole	Difference between AC and DC	Combination of Resistors
Potentiometer	Cells, emf, Internal Resistance	Unit of Specific Resistance
Static Electricity	Ohm’s Law and its Limitations	Resistor Colour Codes
Current Electricity	Resistivity Temperature Dependence	Permittivity And Permeability
Ampere	Difference Between Primary Cell and Secondary Cell	Power transformers
Current Density	Derivation of Drift Velocity	Electromotive Force
Conductivity	Difference between RTD and thermocouple	Relation between resistance and length
Types of Current	Relation between power and resistance	Types of Resistors
Kirchhoff’s Rules	Power Of Alternating Current	Resistivity formula
Drift Velocity	Difference between emf and voltage	Cells in Series and in Parallel
Unit of Current	Differences Between Acceleration and Velocity	Current density formula
Carbon Resistor	Difference between earth and neutral	Uses of Resistor

CBSE CLASS XII Related Questions

1.
An astronomical telescope consists of two converging lenses. One of them of large aperture and large focal length is called objective lens and the other one, of smaller focal length and smaller aperture is called the eyepiece. It is used to see distant objects which are not seen clearly with naked eyes. The image formed by the objective lens acts as an object for the eyepiece and the final image produced by the eyepiece is magnified.

2.
Capacitors are manufactured with certain standard capacitances and working voltages. However, these standard values may not be the ones that are actually needed in a particular application. Two or more capacitors can be grouped in series or in parallel to achieve desired capacitance and voltage. When connected in series, the total capacitance decreases while the voltage rating increases, whereas in parallel connections, the total capacitance increases and maintains the same voltage rating. A capacitor stores energy in the electric field between its plates and stored energy is proportional to the square of the voltage and capacitance $U = \frac{1}{2}CV^2$, where symbols have their usual meanings.
Two capacitors, one of $3 \ \mu$F and the other of $6 \ \mu$F, are connected in series in the circuit as shown in the figure, for a long time. }

3.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

4.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

View Solution

5.
Read the following paragraph and answer the questions that follow.
In an experiment with convex lens of focal length f, the screen is fixed at a distance D from the object. A student slowly moves the lens away from the object towards the screen and finds that she is able to form sharp image of the object for two positions of the lens. The distance between these two positions of the lens is d.

6.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

The total charge of the two spheres is conserved.
Both spheres attain the same potential.
The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2)}{(r_1 + r_2)}$
The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2) (r_1 + r_2)}{r_1 r_2}$

View Solution

Why should we get the null point in the middle of the Metre bridge wire?

Related Questions

CBSE CLASS XII Related Questions

3.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

4.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

6.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

Why should we get the null point in the middle of the Metre bridge wire?

Related Questions

CBSE CLASS XII Related Questions

3.A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

4.With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

6.Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

3.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

4.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

6.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?