| ⇦ | 
| ⇨ |
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: - A particle doing SHM has amplitude=4 cm and time period = 12 sec. The ratio between times
- An oscillator circuit consists of an inductance of 0. mH and a capacitor of 20 μF.
- The ratio of longest wavelength corresponding to Lyman and Blamer series
- A thermally insulated rigid container contains an ideal gas heated by a filament
- The velocity of a particle performing simple harmonic motion, when it passes
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A particle doing SHM has amplitude=4 cm and time period = 12 sec. The ratio between times
- An oscillator circuit consists of an inductance of 0. mH and a capacitor of 20 μF.
- The ratio of longest wavelength corresponding to Lyman and Blamer series
- A thermally insulated rigid container contains an ideal gas heated by a filament
- The velocity of a particle performing simple harmonic motion, when it passes
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