The bridge formed with given resistances is a balanced Wheatstone's bridge The situation can be depicted as shown in the figure. 
As resistances S and 6Ω are in paralle, their effective resistance is 6+S6SΩ. For balancing condition, QP=(6+S6S)R or 22=6 S2(6+S) or 3 S=6+S⇒S=3Ω
Three resistances P, Q, R each of 2 Ω and an unknown resistances S form the four arms of a Wheatstone bridge circuit. When a resistance of 6 Ω is…
NEET UG 2007 — Physics Electromagnetism
2007mcqmedium
Three resistances P,Q,R each of 2Ω and an unknown resistances S form the four arms of a Wheatstone bridge circuit. When a resistance of 6Ω is connected in parallel ot S the bridge gets balanced. What is the value of S ?
Official previous-year question
Held on 30 Apr 2007 · Verified 9 Jul 2026.
Options
- A
3Ω
- B
6Ω
- C
1Ω
- D
2Ω।
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