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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CBSE CLASS XII Related Questions

1.
Read the following paragraph and answer the questions that follow.
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Read the following paragraph and answer the questions that follow.
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Why is Wheatstone's bridge more accurate?

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CBSE CLASS XII Related Questions

2.
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.

5.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

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Why is Wheatstone's bridge more accurate?

Related Questions

CBSE CLASS XII Related Questions

2.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.

5.Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

2.
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.

5.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?