Question

18. In the balanced condition of a Wheatstone Bridge the
needle of the galvanometer is :
O Deflected Anti Clockwise
O Oscillates about the neutral position
Not Deflected at all from the neutral position
O Deflected Clockwise​

Answer 1

In the Balanced Wheatstone Bridge, the needle of the Galvanometer is not deflected from the neutral position.

• A balanced wheatstone bridge consists of four resistance placed at four sides of a square in between two terminals such that ratio of adjacent resistance will be equal.

• In that case , the Galvanometer connecting the intermediate terminals do not show any deflection.

• This means that current does not flow through the galvanometer. Hence, its called balanced.

Condition for balanced wheatstone bridge:

$\boxed{ \bold{ \large{\dfrac{R1}{R2} = \dfrac{R3}{R4} }}}$