Question

For a cell, the terminal potential difference is 3.6 V, when the circuit is open. If the potential
differeyke reduces to 3 V, when cell is connected to a resistance of 50, the internal
resistance of cell is​

Answer 1

Internal resistance of cell is​ = 10 Ω

Explanation:

E = 3.6 V

R = 50 Ω

r = ?

 I = E / R + r = 3.6 / 50 + r

Potential difference = IR = 3.6 / (50+r) * 50 = 3

  3 (50+r) = 3.6 * 50

  50 + r = 3.6 / 3 * 50

   50 + r = 60

  r = 60-50 = 10

Internal resistance of cell is​ = 10 Ω