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Wheatstone's Bridge MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

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  • Wheatstone's bridge is considered one of the most asked concept.

  • 12 Questions around this concept.

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In a Wheatstone’s bridge, three resistance P,Q  and R  connected in the three arms and the fourth arm is formed by two resistance S1 and S2  connected in parallel. The condition for bridge to be balanced will be

The current  I   drawn from the 5  volt source will be :

Concepts Covered - 1

Wheatstone's bridge

Wheatstone's Bridge

It is an arrangement of four resistances which can be used to measure one of them in terms of rest. Let R is an adjustable resistance, Pand Q are known resistance and S is an unknown resistance. To obtain valur of S we will close the keys K1 and K2 and will adjust R to obtain null deflection in the galvanometer. Then the balancing condition of bridge is 

\frac{P}{Q}= \frac{R}{S}

V_{B} = V_{D}

( Balanced condition )

No current will flow through the galvanometer

unbalanced condition:V_{B}>V_{D}

(V_{A}-V_{B})<(V_{A}-V_{D})

 

Current will flow from A to B

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Wheatstone's bridge

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