Manipal MET2017PhysicsCurrent Electricity
Two identical cells whether connected in parallel or in series gives the same current when connected to an external resistance 1.5 . Find the value of internal resistance of each cell
Options
- A1
- B0.5
- Czero
- D1.5
Correct answer
D. 1.5
Step-by-step solution
Let n cells be in series and m in parallel, then n E R+n r = E R+ r m n [R+ r m ]=R+n r n R m+n r=R m+m n r 6+2 r=3+4 r 2 r=3 R=1.5