| ⇦ | 
| ⇨ |
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: - Weber/m² is equal to
- An aeroplane flies 400m due to North and then 300m due to south and then flies
- If sound wave travel from air to water, which of the following remains unchanged?
- The ionisation energy of hydrogen is 13.6 eV. The energy of the photon released
- A person can see clearly objects only when they lie between 50 cm and 400 cm from
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Weber/m² is equal to
- An aeroplane flies 400m due to North and then 300m due to south and then flies
- If sound wave travel from air to water, which of the following remains unchanged?
- The ionisation energy of hydrogen is 13.6 eV. The energy of the photon released
- A person can see clearly objects only when they lie between 50 cm and 400 cm from
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