Potentiometer wire `PQ` of `1m ` length is connected to a standerd cell `E_(1)`. Another cell, `E_(2)` of emf `1.02 V` is connected with a resistance `r` and a switch `S` open, null position is obtained at a distance of `51 cm` from `P` Calculate (i) potential gradient of the potentiometer wire and (ii) emf of the cell `E_(1)` (iii) when swich `S` closed will mull point move toward `P` or toward `Q` ? Given resion for your answer ?

A potentiometer wire PQ of 1 m length is connected to a standard cell E_(1) . Another cell E_(2) of emf 1.02 V is connected with a resistance ‘r’ and switch S (as shown in figure). With switch S open, the null positon is obtained at a distance of 49 cm from Q. The potential gradient in the potentiometer wire is:

Potentiometer wire PQ of 1 m length is connected to a standard cell E_(1) . Another cell E_(2) of emf 1.02 V is connected with a resistance r and a switch S as shown in the circuit diagram. With switch S open, the null position is obtained at a distance of 51 cm from P . (i) Calculate the potential gradient of the potentiometer wire. (ii) Find the emf of cell E_(1) . (iii) When switch S is closed, will the null point move toward P or toward Q ? Give reason for your answer.

Potentiometer wire PQ of 1 m length is connected to a standard cell E_(1) . Another cell E_(2) of emf 1.02 V is connected with a resistance r and a switch S as shown in the circuit diagram. With switch S open, the null position is obtained at a distance of 51 cm from P . (i) Calculate the potential gradient of the potentiometer wire. (ii) Find the emf of cell E_(1) . (iii) When switch S is closed, will the null point move toward P or toward Q ? Give reason for your answer.

The potential gradients on the potentiometer wire are V_(1) and V_(2) with an ideal cell and a real cell of same emf in the primary circuit, then

The potential gradients on the potentiometer wire are V_(1) and V_(2) with an ideal cell and a real cell of same emf in the primary circuit then

A cell of e.m.f. 2 V and negligible internal resistance is connected in series with a potentiometer wire of length 100 cm. The e.m.f of the Leclanche cell is found to balance on 75 cm of the potentiometer wire. The e.m.f. of the cell is

A cell of e.m.f. 2 V and negligible internal resistance is connected in series with a potentiometer wire of length 100 cm. The e.m.f of the Leclanche cell is found to balance on 75 cm of the potentiometer wire. The e.m.f. of the cell is

A cell of e.m.f. 2 volt and negligible internal resistance is connected to potentiometer wire of length 4 m and resistance 25 Omega , to form a closed circuit. Find the potential gradient along the wire .

The null point in a potentiometer with a cell of e.m.f. xi is obtained at a distance l on the wire. Then :

AB is a potentiometer wire of length 100 cm and its resistance is 10 ohms . It is connected in series with a resistance R = 10 ohms and a battery of e.m.f. 2 V and negligible internal resistance. If a source of unknown e.m.f. E is balanced by 40 cm length of the potentiometer wire, the value of E is