If the galvanometer shows null deflection in the given figure then the value of Y is:
Correct answer: C. 300Ω
- A. 100Ω
- B. 200Ω
- C. 300Ω
- D. 400Ω
Explanation
V A- V B= 3V = i 1Yi1 = 12/100 + 800 + Y = 12/900+ Yi 1Y=312Y/900+ Y = 3Y = 300ΩHence, option C is correct.
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