H2P-293
Potential dividers
H2 Physics · JC 2 · Medium · Potential dividers
A 3.0 V cell with internal resistance 0.50 Ω is connected across a uniform wire XY of length 1.0 m and resistance 4.0 Ω. A second cell of e.m.f. 1.5 V and negligible internal resistance is connected in series with a galvanometer to a sliding contact P on XY. What is the length XP for a null deflection?
- 0.45 m
- 0.56 m
- 0.67 m
- 0.80 m
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