| ⇦ | 
| ⇨ |
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 to S the bridge gets balanced. What is the value of S?
Options
(a) 3Ω
(b) 6Ω
(c) 1Ω
(d) 2Ω
Correct Answer:
3Ω
Explanation:
A balanced wheatstone bridge simply requires P/ Q = R / s 2 / 2 = 2 / S
Therefore, S should be 2Ω. A resistance of 6Ω is connected in parallel. In parallel combination,
1/R = 1/R₁ + 1/R₂
1/2 = 1/6 + 1/S
S = 3Ω
Related Questions: - A bar magnet of moment of inertia I is vibrated in a magnetic field of induction
- Consider a two particle system with particle having masses m₁ and m₂. If the first
- Perfectly black body radiates the energy 18 J/s at 300K. Another ordinary body of e=0.8
- Two circuits have a mutual inductance of 0.1 H. What average e.m.f. is induced
- The radius of curvature of a convave mirror is 24 cm and the imager is magnified
Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A bar magnet of moment of inertia I is vibrated in a magnetic field of induction
- Consider a two particle system with particle having masses m₁ and m₂. If the first
- Perfectly black body radiates the energy 18 J/s at 300K. Another ordinary body of e=0.8
- Two circuits have a mutual inductance of 0.1 H. What average e.m.f. is induced
- The radius of curvature of a convave mirror is 24 cm and the imager is magnified
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply