PracticeMedium
Q.In a metre bridge, the null point is obtained at 30 cm from left. When a resistor is connected in parallel with the unknown resistance , null point becomes 25 cm. Then is
a
5 Ω
b
7.5 Ω
c
10 Ω
d
15 Ω
Correct Answer: Option B
The correct solution involves applying the fundamental concept to derive the final value step by step...