Internal resistance of primary cell physics experiment for std 11 & 12

Internal resistance of primary cell

Internal resistance of primary cell physics practical for std 11 & 12

AIM : To find the internal resistance of a primary cell, by calculation and from a graph, with

the help of a potentiometer.

PRINCIPLE : It works on the principle of potentiometer.

Apparatus: A potentiometer, 
having a long (~400 cm) resistive wire of uniform cross-section, a battery E of

3 to 4 V, a primary cell ( dry cell or Laclanche cell or a Daniel cell), two
rheostats [ 0 – 25 W (Rh₁) and 0 – 500 W (Rh₂) ], a galvanometer, a R.B.(0 –
50 W), two simple keys and a jockey.

Resistance, wire, Battery, Cell, Dry_cell, Rheostate, Galvanometer,

Internal resistance apparatus

Internal resistance practical

Internal resistance Observation table

Internal resistance Graph

Internal resistance graph

For more details :

Internal Resistance Practical video.