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In an L-R series circuit L=17511 mH and R=12 Ω; a variable emf source V=V0sinωt of Vrms=1302 V and frequency 50 Hz is applied. The current amplitude in the circuit and phase of current with respect to voltage are respectively (Use π=227).

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Important Questions on Alternating Current

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In an AC circuit, a resistance of R ohm is connected in series with an inductance L. If phase angle between voltage and current by 45°, the value of inductive reactance will be
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In an ac circuit, the potential differences across an inductance and resistance joined in series are respectively 16 V and 20V. The total potential difference across the circuit is_____.

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An alternating current of frequency f is is flowing in a circuit containing a resistance R and a choke L in series. The impedance of this circuit is
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An alternating current flows through a circuit consisting of inductance L and resistance R. Periodicity of the supply is ω2π. which of the following is true?
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In following diagram voltage on L and C is-

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An LCR series circuit is connected to a source of alternating current. At resonance, the applied voltage and the current flowing through the circuit will have a phase difference of-
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Same current is flowing in two alternating circuits. The first circuit contains only inductance and the other contains only a capacitor. If the frequency of the EMF of AC is increased, the effect on the value of the current will be
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Energy dissipates in LCR circuit in