| ⇦ | 
| ⇨ |
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 magnetic field of 1600 A/m produces a magnetic flux of 2.4 x 10⁻⁵ Wb
- The velocity of molecules of a gas at temperature 120 K is v. At what temperature
- In cyclotron, for a given magnet, radius of the semicircle traced by positive ion
- Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively
- On the horizontal surface of a truck a block of mass 1 kg is placed (µ=0.6) and truck
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A magnetic field of 1600 A/m produces a magnetic flux of 2.4 x 10⁻⁵ Wb
- The velocity of molecules of a gas at temperature 120 K is v. At what temperature
- In cyclotron, for a given magnet, radius of the semicircle traced by positive ion
- Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively
- On the horizontal surface of a truck a block of mass 1 kg is placed (µ=0.6) and truck
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