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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: - The current in a conductor varies with time t as I=2t+3t² Where I is in amperes
- In common base mode of a transistor, the collector current is 5.488 mA
- In p- type semiconductor, the acceptor level lies
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The current in a conductor varies with time t as I=2t+3t² Where I is in amperes
- In common base mode of a transistor, the collector current is 5.488 mA
- In p- type semiconductor, the acceptor level lies
- A sphere of 4cm radius is suspended with in a hollow sphere of 6cm radius. If the inner
- A slab consists of two parallel layers of two different materials of same thickness
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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