| ⇦ | 
| ⇨ |
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 physical quantity which does not have the same dimensions as the other three is
- In an interference experiment, third bright fringe is obtained at a point
- A road of width 20 m forms an arc of radius 15 m,its outer edge is 2m higher than
- A bomb of mass 16 kg at rest explodes into two pieces of masses of 4 kg and 12 kg.
- With the decrease of current in the primary coil from 2 amperes to zero value
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The physical quantity which does not have the same dimensions as the other three is
- In an interference experiment, third bright fringe is obtained at a point
- A road of width 20 m forms an arc of radius 15 m,its outer edge is 2m higher than
- A bomb of mass 16 kg at rest explodes into two pieces of masses of 4 kg and 12 kg.
- With the decrease of current in the primary coil from 2 amperes to zero value
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