question_answer

While conducting an experiment, using meter bridge, to determine a value of an unknown resistance, Rahul obtained deflection in the galvanometer in the same direction even after repeated adjustment in the circuit and getting faulty answer. Under the observation and guidence of his laboratory instructor, he finally succeeded in his experiment.

(i) Write any one possible reason for getting the deflection in the galvanometer in the same direction.

(ii) What values displayed by lab instructor?

Answer:

Reasons for getting faulty results are as follows:

(i) (a) The two resistances in the gaps of the bridge

may not be of the comparable value as \[\frac{P}{Q}=\frac{R}{S}\] should be maintained

(b) Current may not be flowing in both the arms due to loose contact.

(ii) Knowledge of his work and helping nature.