Why is the Wheatstone bridge better than the other methods of measuring resistances?

It does not involve Ohm's law

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It is based on Kirchoff's law

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It has four resistor arms

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It is a null method

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Solution

The correct option is B It is a null method
The Wheatstone bridge is used to measure the unknown resistance by using null method. i.e, when the bridge is balanced, no current through the galvanometer. Using this null method, we can easily measure the unknown resistance if the other three arm's resistor are given.

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Similar questions

In a Wheatstone bridge the four arms have each a resistance of 50 ohm. The galvanometer current is :

P, Q, R, S

The resistance in ohms in the four arms of a Wheatstone bridge are as follows. In which combination of the following is the bridge balanced?

P, Q, R

s

s_{1}

s_{2}

\frac{P}{Q} =

P, Q, R

2 Ω

S

6 Ω

S

S

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