Two potentiometers, P1 and P2, have identical wires and driver cells. However, P1 uses a rheostat with a higher resistance range than P2. Which potentiometer will offer greater sensitivity in balancing a given cell?

The potential gradient along the length of a uniform wire is $10\,\,volt/metre$. $B$ and $C$ are the two points at $30\,\,cm$ and $60\,\,cm$ point on a meter scale fitted along the wire. The potential difference between $B$ and $C$ will be

A potentiometer wire of length 1 m has a resistance of 10 Ω. A cell of emf 2 V and negligible internal resistance is connected to the wire. What is the potential gradient across the wire?

Two cells when connected in series are balanced on 8 m on a potentiometer. If the cells are connected with polarities of one of the cells reversed, they balance on 2 m. The ratio of e.m.f.'s of the two cells is

The potentiometer is superior to a voltmeter for measuring a potential difference because

The length of a wire of a potentiometer is ${\rm{100}}\,\,{\rm{cm}}$, and the emf of its stand and cell is $E$ volt. It is employed to measure the emf of a battery whose internal resistance is ${\rm{0}}{\rm{.5}}\,\,{\rm{\Omega }}$. If the balance point is obtained at $l\,{\rm{ = }}\,{\rm{30}}\,\,{\rm{cm}}$ from the positive end, the emf of the battery is

A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series 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 of the wire in the two cases. The ratio of emf’s is:

The length of a potentiometer wire is $l$. A cell of emf E is balanced at a length $l/4$ from the positive end of the wire. If the length of the wire is increased by $l/2$, at what distance will the same cell give a balanced point? (Potentiometer battery is ideal)

A ${\rm{2}}\,\,{\rm{V}}$ battery, a $990\,\,{\rm{\Omega }}$ resistor and a potentiometer of ${\rm{2}}\,\,{\rm{m}}$ length, all are connected in series of the residence of potentiometer wire is $10\,\,{\rm{\Omega }}$, then the potential gradient of the potentiometer wire is

In a potentiometer experiment, the balancing length with a cell is $560\,cm$. When an external resistance of $10\,\Omega$ is connected in parallel to the cell the balancing length changes by $60\,cm$. The internal resistance of the cell in ohm is

A potentiometer wire of length $L$ and resistance $10\,\,{\rm{\Omega }}$ is connected in series with a battery of e.m.f. $2.5\,\,V$ and a resistance in its primary circuit. The null point corresponding to a cell of e.m.f. $1\,V$ is obtained at a distance $\frac{L}{2}$. If the resistance in the primary circuit is doubled then the position of new null point will be