Resistances in the left gap and right gap of a meter bridge are 10 and 30 respectively. If the resistances in the two gaps are interchanged, the balance point will shift to right by

Step-by-step solution

In first case aligned & R =10 ~S =30 & R ~S = l 100-l & 10 30 = l 100-l & l₁=25 ~cm aligned In second case aligned & R =30 ; S =10 & R ~S = l^ 100-l^ & 30 10 = l^ 100-l^ & l^ =75 ~cm aligned The balance point will shift by 75 ~cm -25 ~cm is 50 cm