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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: - When germanium is doped with phosphorus what type of semiconductor is produced?
- The power factor of an AC circuit having resistance R and inductance L connected
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- When germanium is doped with phosphorus what type of semiconductor is produced?
- The power factor of an AC circuit having resistance R and inductance L connected
- When 10¹⁹elecrons are removed from a neutral metal plate through some process,
- A thin prism of angle 15⁰ made of glass of refractive index µ₁ = 1.5 is combined
- In an A.C circuit of capacitance the current from potential is
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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