Question

the internal resistance of a cell
A. always acts in the cell in open circuit
B. acts only in closed circuit and it reduces emf
C. acts only in closed circuit and it reduces the current
D. none​

Answer 1

Answer:

always acts in the cell in open circuit

Answer 2

the internal resistance of a cell -

• it is defined as the resistance offered by the cell to the flow of current through it
• it acts only when  no current is flowing through the current, that is in closed circuit
• it slightly reduces the emf ( electro motive force)

• emf is defined as the potential difference across the two ends of the cell when no current is flowing through it.
• internal resistance is usually represented by r.

hence, the correct option is C. acts only in closed circuit and it reduces the current