Question

A dry cell delivering 2 A has terminal voltage 3 V in its open
circuit voltage is 3.5 V then internal resistance of the cell is​

Answer 1

Answer:

0.25 ohm

Explanation:

Total resistance = emf / Current

                                    = 3.5 / 2

                                    = 1.75 ohm

now ,

  resistance without internal resistance = terminal voltage / current

                                                                  = 3/2

                                                                  = 1.5 ohm

so, internal resistance = 1.75 - 1.5

                                     = 0.25 ohm

Hope it helps