question_answer

Direction: Q.46 to Q.50

A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. The primary benefit of the circuit is its ability to provide extremely accurate measurements.

The resistance is adjusted until the bridge is "balanced" and no current flows through the galvanometer. At this point, the voltage between the two mid-points (B and D) will be zero.

Therefore the ratio of the two resistances in the known leg is equal to the ratio of the two resistances in the unknown leg.

Read the above passage carefully and give the answer of the following questions:

In balanced Wheatstone bridge:                   

A) potential at points B and D remain same

B) large current flows through the circuit

C) battery becomes over heated                        

D) resistances become small