[" Which of the following can cause the null "],[" point of a potentiometer to shift beyond the "],[" wire "]

The null point of a potentiometer wire will shift beyond the potentiometer wire if

When null point is obtained in the potentiometer the current is drawn from

When null point is obtained in the potentiometer the current is drawn from

The sensitivity of potentiometer wire can be increased by

Can we use copper wire as potentiometer wire ? Explain.

If the current in a potentiometer increases, the position of the null point will

If the current in a potentiometer increases, the position of the null point will

A cell in the secondary circuit gives null deflection for 2.5 m length of a potentiometer having 10m length of wire. If the length of the potentiometer wire is increased by 1m without changing the cell in the primary, the position of the null point wil be

A cell in the secondary circuit gives null deflection for 2.5 m length of a potentiometer having 10m length of wire. If the length of the potentiometer wire is increased by 1m without changing the cell in the primary, the position of the null point wil be

In an experiment with a potentiometer, V_B=10 V . R is adjusted to be 50 Omega (see figure) . A student wanting to measure voltage E_1 of a battery ( approx. 8V) finds no null point.He then diminishes R to 10 Omega and is able to locate the null point on the last (4th) segment of the potentiometer.Find the resistance of the potentiometer wire and potential drop per unit length across the wire in the second case.