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Power dissipated in an LCR series circuit connected to an a.c source of emf ? is
Options
(a) ?ᅡᄇ √ [ R² + ( L? – 1 / C?)² ] / R
(b) ?ᅡᄇ [ R² + ( L? – 1 / C?)² ] / R
(c) ?ᅡᄇR / √ [ R² + ( L? – 1 / C?)² ]
(d) ?ᅡᄇR / [ R² + ( L? – 1 / C?)² ]
Correct Answer:
?ᅡᄇR / [ R² + ( L? – 1 / C?)² ]
Explanation:
Power dissipated in series LCR;
P = IR = / (Z) R
= ?ᅡᄇR / [ R² + ( L? – 1 / C?)² ]
where Z = √ R² + ( L? – 1 / C?)²
is called the impedance of the circuit.
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A student measures the terminal potential difference (V) of a cell
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- When a metallic surface is illuminated with radiation of wavelength λ,
- Two point white dots are 1 mm apart on a black paper.
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Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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