[" A potentiometer wire of length "10cm" and resistance "32Omega],[" is connected in series with a battery of EMF "2.5V" ,internal "],[" resistance "3Omega" and external resistance "R" .If a secondary cell "],[" of "0.4V" is balanced at "8cm" length.Then value of "R" is "]

A potentiometer wire of length 10 m and resistance 30 Omega is connected in series with a battery of emf 2.5 V , internal resistance 5 Omega and an external resistance R . If the fall of potential along the potentiometer wire is 50 mu V mm^(-1) , then the value of R is found to be 23 n Omega . What is n ?

A potentiometer wire of length 10 m and resistance 30 Omega is connected in series with a battery of emf 2.5 V , internal resistance 5 Omega and an external resistance R . If the fall of potential along the potentiometer wire is 50 mu V mm^(-1) , then the value of R is found to be 23 n Omega . What is n ?

A potentiometer wire of length 1m and resistance 20 Omega is connected in series with a 15V battery and an external resistance 40 Omega . A secondary cell of emf E in the secondary circuit is balanced by 24 cm long potentiometer wire. The emf E of the cell is ,

A potentiometer wire of length 1m and resistance 20 Omega is connected in series with a 15V battery and an external resistance 40 Omega . A secondary cell of emf E in the secondary circuit is balanced by 24 cm long potentiometer wire. The emf E of the cell is ,

A potentiometer wire has a resistance of 20 Omega and length 10 m. It is connected in series with a battery of emf 2.5 V and negligible internal resistance, and an external resistance of 5 Omega . Fall of potential in mV per metre is

AB is a potentiometer wire of length 100 cm and its resistance is 10 Omega . It is connected in series with a battery of emf 2V and resistance 40 Omega . If a source of unknown emf E is balanced by 40 cm length of the potentiometer wire, the value of E is :-

A potentiometer wire of length 10m and resistance 20Omega is connected in series with another resistance of 80Omega and a battery of emf 4V . The potential gradient on the wire will be (in mV//cm )