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Question
In the meter bridge experiment, balance point was observed at J with AJ = l.
(i) The values of R and X were doubled and then interchanged. What would be the new position of balance point?
(ii) If the galvanometer and battery are interchanged at the balance position, how will the alance point get affected?
Solution
(i) As the ratio of `R/X`is now interchanged by `(2X)/(2R) =X/R`, the new balance point will be = 100 − l = 100 − AJ `(as R/X =l/(100 -l))`
(ii)
At the balance position there is no current flowing through the galvanometer. Hence, interchanging the battery and the galvanometer will have no effect on the balance point.
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