A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to
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Electrical Engineering · all questionsA.C Fundamentals, Circuits And Circuit Theory
A.C Fundamentals, Circuits And Circuit Theory
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In a series resonant circuit, the impedance of the circuit is
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In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value
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Power factor of the following circuit will be zero
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Form Factor is the ratio of
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The form factor is the ratio of
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In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters?
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The period of a sine wave is ___________ seconds. Its frequency is
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The time constant of the capacitance circuit is defined as the time during which voltage
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The square waveform of current has following relation between r.m.s. value and average value.
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The r.m.s. value of pure cosine function is
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The phosphors for which of the following pair are 180° out of phase for VL, VC and VR?
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The r.m.s. value of half wave rectified sine wave is 200 V. The r.m.s. value of full wave rectified AC. will be
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In an AC. circuit, a low value of kVAR compared with kW indicates
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If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is
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If a sinusoidal wave has frequency of 50 Hz with 30 A r.m.s. current which of the following equation represents this wave?
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The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is
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What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value?
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The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of
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Power factor of an inductive circuit is usually improved by connecting capacitor to it in
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