JEE Main2013PhysicsCurrent ElectricityActual
To find the resistance of a galvanometer by the half deflection method the following circuit is used with resistances R ₁=9970 ~W , R ₂=30 ~W and R ₃=0 . The deflection in the galvanometer is d. With R ₃=107 ~W the deflection changed to d 2 . The galvanometer resistance is approximately:
Options
- A107
- B137
- C107 / 2
- D77
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