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.

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 ?

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

Potentiometer wire of length 1 m is connected in series with 490Omega resistance and 2V battery. If 0.2 mV//cm is the potential gradient, then resistance of the potentiometer wire is

A 10 m long potentiometer wire carries a steady current. A standard cell of emf 1.018 V is balanced against a length of 254.5 cm of the wire. What is the potential gradient across the potentiometer wire ?

A potentiometer consists of a wire of length 4 m and resistance 10Omega . It is connected to a cell of emf 2V.The potential gradient of the wire is

A potentiometer consists of a wire of length 4 m and resistance 10Omega . It is connected to a cell of emf 2V.The potential gradient of the wire is

A potentiometer wire of length 100 cm has a resistance of 10 Omega . It is connected in series with a resistance R and cell of emf 2 V and of of 40 cm of the potentiometer wire. What is the value of R ?

A battery of emf 26V and internal resistance 0.4 ohm is connected to a resistance of 10ohm and a potentiometer wire of length 10m. What is the potential gradient on the wire if the resistance of the potentiometer wire is 5 ohm –