The resistance of a potentiometer wire is `10 Omega` and its length is 10 meter. A resistance box and 2 V accumulator are placed in series with it. What should be the value of resistance in the box if it is desired to have potential drop of `1muV`/mm?

The resistance of a potentiometer wire is 8 Omega and its length is 8 m. A resistance box and a 2V battery are connected in series with it. What should be the resistance in the box, if it is desired to have a potential drop of 1muV//mm ?.

A potentiometer wire is 10 m long and has a resistance of 2 Omega//"m". It is connected in series with a battery of e.m.f. 3 V and a resistance of 10Omega . The potential gradient along the wire in V/m is

The resistance of a 1m long nichrome wire is 6 Omega . If we reduce the length of the wire to 70 cm, what will its resistance be?

Resistors having resistances of 15 Omega , 20 Omega and 10 Omega are connected in parallel. What is the effective resistance in the circuit?

A potentiometer wire has a length of 4 m and resistance of 4 Omega . What resistance must be connected in series with the potentiometer wire and a cell of e.m.f. 2 V having internal resistance 2 Omega to get a potential drop of 10^-3V/(cm) along the wire?

A potentiometer wire has a length of 1.5 m and resistance of 10 Omega . It is connected in series with the cell of emf 4 Volt and internal resistance 5 Omega . Calculate thepotential drop per centimeter of the wire.

In a meter bridge experiment, the unknown resistance X in the left gap and a known resistance of 60 Omega in right gap, null point is obtained at l cm from left. If the unknown resistance X is shunted by an equal resistance, what should be the value of known resistance in the right gap in order to get the null point at the same place?

A potentiometer wire has a length of 2m and resistance 10Omega . It is connected in series with resistance 990Omega and a cell of emf 2V. Calculate the potential gradient along the wire.