THE PRACTICE STUDIO
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PRACTICE / Galvanometer half-deflection experiment
Does the shortcut meet the tolerance?
In a half-deflection experiment, R = 3000 Ω and S = 150 Ω. A student reports the coil resistance as S.
By what percentage does this underestimate the exact inferred G, relative to that exact G?
Organize the givens & assumptions
- R = 3000 Ω
- S = 150 Ω
- Exact half deflection
The same-emf linear circuit model holds; the requested denominator is exact G, not the approximate S.
- A
- B
- C
- D
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