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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: - A double slit experiment is performed with light of wavelength 500 nm. A thin film
- In a potentiometer experiment, the balancing with a cell is at length 240 cm.
- A transverse wave is represented by y = a sin (?t – kx)
- The self-inductance of a coil having 500 turns is 50mH. The magnetic flux
- A body of mass 2 kg is moved by a force F=3x where x is the distance covered.
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A double slit experiment is performed with light of wavelength 500 nm. A thin film
- In a potentiometer experiment, the balancing with a cell is at length 240 cm.
- A transverse wave is represented by y = a sin (?t – kx)
- The self-inductance of a coil having 500 turns is 50mH. The magnetic flux
- A body of mass 2 kg is moved by a force F=3x where x is the distance covered.
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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