Why is it preferred to obtain the null point in a metre bridge between 40 cm and 60cm of the wire ?

The distance between the positions of two null points obtained in a metre brige wire of length 100 cm , by interchaging a known resistance of 2.5Omega and an unknown resistance in the two gaps , is 28.6 cm . Find the value of the unknown resistance .

Why are the connections between the resistance in a metre bridge made of thick copper strips ?

Why is end - correction necessary in a metre - bridge?

In a potetiometer experiment why is ti necessary to use a long wire? Length and resistence of a potetiometer wire are 4m and 10Omega respectively. It is concerned to a cell of mef2 volt. Another cell when joined to this potntiometer and null point is meausred at 250 cm. Find out the emf of the second cell.

A poterntimeter wire is 100 cm long and a constant potential difference is maintained acrooss it . Two cells are connected in seires first to support one another and then in opposite direction . The balance points are obtained at 50 cm and 10 cm from the positive end the wire in the two cases . The ratio of emf's is

In a metre bridge , null point is obtained at 42.1"cm" on the wire when a 3Omrga resistance is kept in the left gap and a 4Omega resistance in the right gap of the bridge . The null point is shifted towards right by 15.0 cm when the two resistance are interchanged . Determine the end error of the bridge .

In a metre bridge experiment , a null point is obtained at a length of 39.8 cm when a 2Omega resistance is placed in the left gap and a 3Omega resistance in the right gap . If the two resistance are interchanged , the null point is obtained at 60.8 cm . Calculated the end errors of the bridge .