In an experiment on metre bridge, if the balancing length AC is 'x' . What would be its value, when the radius of the metre bridge wire AB is doubled? Justjfy the answer. 

Consider the figure below.


here AC =x and the resistance of segments AC and BC are RAC and RBC respectively.

Now, the condition of no deflection dictates that

R/r =  RAC/RBC

If the resistance of AB is doubled, the ratio R/r or RAC/RBC will remain unchanged.

Thus, the balancing length AC= x will stay the same.

  • 45
What are you looking for?