The resistance of a potentiometer wire of length 10 m is `25 Omega`. A resistance box and a 2 volt accumulator are connected in series with it. What resistance should be introduced in the box to have a potential drop of one microvolt per millimetre of the potentiometer wire ?

How can you make a potentiometer of given wire length more sensitive using resistance box?

A potentiometer wire of length 1 m has a resistance 10 ohm. It is connected to 6 V battery in series with a resistance of 5 ohm. Determine the emf of the primary cell which gives a balance point at 40 cm.

The potentiometer wire of length 100cm has a resistance of 10Omega. It is connected in series with a resistance of 5Omega and an accumulat or emf 3V having negligible resistance. A source 1.2V is balanced against a length 'L' of the potentionmeter wire. find the value of L.

A potentiometer wire of length 100 cm has a resistance of 10Omega. It is connected in series with a resistance and an accumulator of emf 2V and negligible internal resistance. A source of emf 10 mV is balanced against a length of 40 cm of the potentiometer wire. what is the value of the external resistance?

A potentiometer has 10 wires each of 1 meter length and the total resistance is 20Omega. Find the resistance to be connected to the driving battery of emf 2 volts to produce a potential drop of 1 mu V per millimeter.

Ten identical wires each having a resistance of 1Omega are connected in parallel. The combination will have a resistance of

A 10 meter long wire of uniform cross section of 20 Omega resistance is used as a potentiometer wire. This wire is connected in series with a battery of 5V along with an external resistance of 480 Omega if an unknown emf epsilon is balanced at 600 cm of this wire , calculate the potential gradient of the potentiometer wire.