| ⇦ | 
| ⇨ |
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: - If a nucleus ᴢXᴬ emits 9α and 5β-particles, then the ratio of total protons and neutrons
- Electromagnets are made of soft iron because soft iron has
- A current of 2A flows through a 2Ω resistor when connected across a battery
- Zenor diode is used for
- The time period of bar magnet is doubled when magnetic field is reduced
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If a nucleus ᴢXᴬ emits 9α and 5β-particles, then the ratio of total protons and neutrons
- Electromagnets are made of soft iron because soft iron has
- A current of 2A flows through a 2Ω resistor when connected across a battery
- Zenor diode is used for
- The time period of bar magnet is doubled when magnetic field is reduced
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