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 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.

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

The potentiometer consists of a wire of length 4 m and resistance of 10Omega . It is connected to a cell of e.m.f. 2 V. The potential difference per unti length of the wire will be

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 ?

A 5m long wire is used with uniform area of cross-section and 50 ohm resistance inpotentiometer.The wire is connected in series with a battery of 10V along with external resistance 450ohm. If unknown emf E is balanced at 4m length of wire, find potential gradient of potentiometer wire and value of unknown emf

Two cells each of e.m.f. 1.1 V and internal resistance 2Omega are joined in parallel with a resistance of 10Omega . Find the curent throught the resistance and through each cell.