Why should the balance point be obtained in the middle of the wire of a metre bridge?

With a certain cell, the balance point is obtained at 65 cm from the end of apotentiometer wire. With another cell whose emf differs from that of the first by 0.1V the balance point is obtained at 60cm. Find the emf of each cell.

In a meterbridge length of the wire is 100cm. At what point balance point be obtained if the resistance are in the ratio 4:5.

In a potentiometer experiment, it is found that no current passes through the galvanometer, when the terminals of a cell are connected across 50 cm of the potentiometer wire. If the cell is shunted by a resistance of 5 ohm, the balance point is found at 40 cm of the wire from the same end. Find the internal resistance of the cell.

Why a meter bridge is used?

Prove that the line segment joining the middle point of two sides of a triangle is parallel to the third side.

Why should there be a long distance transport system in plants?

Using a potentiometer, balance points are obtained at 60 cm and 10 cm with two cells connected in series first to support one another and then in opposition respectively. Find the ratio of the emfs of the cells.

Why is the velocity of water is large in the middle and less near the bank?