Question

. Three identical cells, each of emf 2 V and unknown
internal resistance are connected in parallel. This
combination is connected to a 6 ohm resistor. The
terminal potential difference across each cell is 1.5 V.
What is the internal resistance of each cell?​

Answer 1

Answer:

The answer is 6 Ω.

Explanation:

Formula,

V=R/r+R

Terminal voltage,

V=3r​+RϵR​

⇒1.5=3r​+62×6​

∴r=6Ω