A potentiometer having the potential gradient of `2 mV//cm` is used to measure the difference of potential across a resistance of `10 ohm`. If a length of `50 cm` of the potentiometer wire is required to get null point, the current passing through the `10 ohm` resistor is (in `mA`)

A potentiometer wire carries current. The potential difference across 70 cm of its balances the potential difference across a 2 ohm coil supllied by a cell of e.m.f. 2 volt. When a 1 ohm coil is placed in parallel with the 2 ohm coil, a length equal to 50 cm of the potentiometer wire is required to balance the potential difference across the parallel combination. What is the internal resistance of the 2 V cell?

Calculate the potential gradient of a potentiometer wire of length 5 m ,if resistance of the wire is 5 Omega and current of 1.2 mA flows through it.

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^(-7) ohm-metre and the current passing through it is 0.1 ampere, cross-section of the wire is 10^(-6)" m"^(2) . The potential gradient along the potentiometer wire is

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^(-7) ohm-meter and the current passing through it is 0.1 ampere cross-section of the wire is 10^(-6)m^(2) . The potential gradient along the potentiometer wire is

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^(-7) ohm-metre and the current passing through it is 0.1 ampere, cross-section of the wire is 10^(-6)" m"^(2) . The potential gradient along the potentiometer wire is

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^-7 ohm metre and the current passing through it is 0.1 ampere. Cross-section of the wire is 10^-8 m^2 . The potential gradient along the potentiometer wire is

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^(-7) ohm-meter and the current passing through it is 0.1 ampere, cross-section of the wire is 10^(-6)m^(2) . The potential gradient along the potentiometer wire is

The given potentiometer has its wire of resistance 10 Omega When the sliding contact is in the middle of the potentiometer wire, the potential drop across 2 Omega resistor is :

A current of 1.0 mA is flowing through a potentiometer wire of length 4 m and of resistance 4 Omega , find the potential gradient of potentiometer wire

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