Questions tagged 'AC circuits'

• An LCR circuit contains $R = 50 \Omega$ , $L = 1 mH$ and $C = 0.1 \mu F$. The impedance of the circuit will be minimum for a frequency of
  Category: Alternating Current | Tags: AC circuits
• In a series LCR circuit, resistance $R = 10\Omega $ and the impedance $Z = 20\Omega .$ The phase difference between the current and the voltage is
  Category: Alternating Current | Tags: AC circuits
• A series ac circuit consist of an inductor and a capacitor. The inductance and capacitance is respectively $1 henry$ and $25\mu F.$ If the current is maximum in circuit then angular frequency will be
  Category: Alternating Current | Tags: AC circuits
• An alternating e.m.f. of frequency $v\,\left( { = \frac{1}{{2\pi \sqrt {LC} }}} \right)$ is applied to a series LCR circuit. For this frequency of the applied e.m.f.
  Category: Alternating Current | Tags: AC circuits
• In the circuit shown below, the ac source has voltage $V = 20\cos (\omega t)$ volts with $\omega $= 2000 rad/sec. the amplitude of the current will be nearest to
  Category: Alternating Current | Tags: AC circuits
• The value of the current through an inductance of $1H$ and of negligible resistance, when connected through an ac source of $200$ V and $50$ Hz, is
  Category: Alternating Current | Tags: AC circuits
• The quality factor of LCR circuit having resistance ($R$) and inductance ($L$) at resonance frequency ($\omega $) is given by
  Category: Alternating Current | Tags: AC circuits
• Power factor is maximum in an LCR circuit when
  Category: Alternating Current | Tags: AC circuits
• In an ac circuit the reactance of a coil is $\sqrt 3 $ times its resistance, the phase difference between the voltage across the coil to the current through the coil will be
  Category: Alternating Current | Tags: AC circuits
• The capacity of a pure capacitor is 1 farad. In dc circuits, its effective resistance will be
  Category: Alternating Current | Tags: AC circuits

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