Skip to content
PhysicsNEET 2022Resonance, power and power factor

Alternating Current

A series LCR circuit with inductance 10 H, capacitance 10μF10 \mu{}F and resistance 50Ω50 \Omega is connected to an ac source of voltage V=200sin⁡(100t)V = 200\sin(100t) volt. If the resonant frequency of the LCR circuit is ν0\nu_0 and the frequency of the ac source is ν\nu, then:

  1. A.ν0=100 Hz; ν=100π Hz\nu_0 = 100\ \mathrm{Hz};\ \nu = \dfrac{100}{\pi}\ \mathrm{Hz}
  2. B.ν0=ν=50 Hz\nu_0 = \nu = 50\ \mathrm{Hz}
  3. C.ν0=ν=50π Hz\nu_0 = \nu = \dfrac{50}{\pi}\ \mathrm{Hz}✓
  4. D.ν0=50 Hz; ν=50π Hz\nu_0 = 50\ \mathrm{Hz};\ \nu = \dfrac{50}{\pi}\ \mathrm{Hz}

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

More from this chapter in past papers

From Physics › Alternating Current › Resonance, power and power factor — lectures, notes and every past question on it.

Last revised . Found a mistake? Tell us — corrections are the fastest thing we act on.

ShareWhatsAppTelegram