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 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.

Related Questions:

1. An ideal gas is compressed to half its initial volume by means of several processes.
2. The work done in which of the following processes is zero?
3. An electric dipole placed in a non-uniform electric field experiences
4. A body of mass 3 kg is under a constant force which cause a displacement
5. Watt hour mter measures

Topics: Alternating Current (96)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends