Why is Wheatstone's bridge more accurate?

Wheatstone’s bridge refers to an arrangement of 4 resistances in order to measure one of them in terms of the other three resistances. A Wheatstone Bridge is more accurate than other methods to measure resistance as in the Wheatstone bridge, the resistance is obtained using the null method which is based on Kirchhoff’s law.

In the null method, the resistance of galvanometer and internal resistance of the cell doesn’t affect the null point.
If one or more out of the four resistances are changed, the current passing through the galvanometer becomes zero. This point is known as the null point.
Under this condition, the Wheatstone bridge is balanced.

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Why is Wheatstone's bridge more accurate?

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CBSE CLASS XII Related Questions

1.
Write two advantages of reflecting telescope over refracting telescope.

3.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

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

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Why is Wheatstone's bridge more accurate?

Related Questions

CBSE CLASS XII Related Questions

1.Write two advantages of reflecting telescope over refracting telescope.

3.Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

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

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Write two advantages of reflecting telescope over refracting telescope.

3.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

6.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.