Power dissipated in an LCR series circuit connected to an a.c source of emf ? is

Power Dissipated In An Lcr Series Circuit Connected To An Physics QuestionPower Dissipated In An Lcr Series Circuit Connected To An Physics Question

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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