NEET 2009 PatternMedium
Q.In potentiometer experiment, the balancing length for a cell is 500 cm. When a 5 Ω resistance is connected across the cell terminals, balancing length becomes 400 cm. The internal resistance of the cell is
a
1.25 Ω
b
2.5 Ω
c
5 Ω
d
0.8 Ω
Correct Answer: Option A
The correct solution involves applying the fundamental concept to derive the final value step by step...