| ⇦ | 
| ⇨ |
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 electric potential at the surface of an atomic nucleus (z=50) of radius
- The electric field in a certain region is acting radially outward and is given by E=Ar.
- The ratio of specific charge of an α-particle to that of a proton is
- The slope of the graph showing the variation of potential difference V on X-axis
- Energy of all molecules of a monoatomic gas having a volume V and pressure P is 3PV/2.
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The electric potential at the surface of an atomic nucleus (z=50) of radius
- The electric field in a certain region is acting radially outward and is given by E=Ar.
- The ratio of specific charge of an α-particle to that of a proton is
- The slope of the graph showing the variation of potential difference V on X-axis
- Energy of all molecules of a monoatomic gas having a volume V and pressure P is 3PV/2.
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