In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2Ω, the balancing length becomes 120 cm. The internal resistance of the cell is

Current Electricity: JEE Main 2005 Physics question

JEE Main 2005 · Annual, Paper 1 · Q6500

JEE Main 2005Annual, Paper 1PhysicsEasyCurrent Electricity150× since 2002

In a potentiometer experiment the balancing with a cell is at length

240

cm.

On shunting the cell with a resistance of

2\Omega ,

the balancing length becomes

120

cm

. The internal resistance of the cell is