An unknown resistance R 1 is connected in series with a resistance of 10 Ω. This…
Physics · NEET · NTA Exams — Current Electricity
An unknown resistance R1 is connected in series with a resistance of 10 Ω. This combination is connected to one gap of a metre bridge while a resistance R2 is connected in the other gap. The balance point is at 50 cm. Now, when the 10 Ω resistance is removed the balance point shifts to 40 cm. The value of R1 is (in ohms):
- 20
- 10
- 60
- 40
Answer
(B) 10
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