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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: - At what angle should the two forces 2P and √2 P act,so that the resultant force is P√10?
- Which of the following atoms has the lowest ionisation potential?
- A rectangular copper coil is placed in a uniform magnetic field of induction 40 mT
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- At what angle should the two forces 2P and √2 P act,so that the resultant force is P√10?
- Which of the following atoms has the lowest ionisation potential?
- A rectangular copper coil is placed in a uniform magnetic field of induction 40 mT
- A liquid wets a solid completely. The meniscus of the liquid in a sufficiently long
- The S.I. unit of electric flux is
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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