| ⇦ | 
| ⇨ |
If both the resistance and the inductance in an LR AC series circuit are doubled the new impedance will be
Options
(a) halved
(b) fourfold
(c) doubled
(d) quadrupled
Correct Answer:
doubled
Explanation:
For L-R circuit, Z = √(R² + Xʟ²)
Z₁ = √(R₁² + Xʟ₂²)
Z₂ = √(R₂² + Xʟ₂²)
Given, R₂ = 2R and Xʟ₂ = 2Xʟ
Then, Z₂ = √[(2R)² + (2Xʟ)²] = 2 Z₁
Related Questions: - The velocity of sound is V, in air. If the density of air is increased to four times
- The radius of curvature of the convex face of a plano-convex lens is 12 cm
- The temperature coefficient of the resistance of a wire is 0.00125 per ⁰C.
- When a ball is thrown up vertically with velocity vₒ,it reaches a maximum height
- Two electrons are separated by a distance of 1Å. What is the coulomb force between them?
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The velocity of sound is V, in air. If the density of air is increased to four times
- The radius of curvature of the convex face of a plano-convex lens is 12 cm
- The temperature coefficient of the resistance of a wire is 0.00125 per ⁰C.
- When a ball is thrown up vertically with velocity vₒ,it reaches a maximum height
- Two electrons are separated by a distance of 1Å. What is the coulomb force between them?
Topics: Alternating Current (96)
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