Computer Programming MCQs

5739 MCQs  (Page 134 of 574)

Attempt Computer Programming MCQs Quiz
In a pure inductive circuit___________?
A. The current is in phase with the voltage
B. The current lags behind the voltage by 90°
C. The current leads the voltage by 90°
D. The current can lead or lag by 90°
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The power factor at resonance in R-L- C parallel circuit is________?
A. Zero
B. 0.08 lagging
C. 0.8 leading
D. Unity
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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 ______?
A. 220 v
B. 220v3v
C. 220/v3 v
D. None of the above
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When an alternating current passes through an ohmic resistance the electrical power converted into heat is__________?
A. Apparent power
B. True power
C. Reactive power
D. None of the above
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A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to________?
A. The capacitive reactance in ohms
B. The current flowing in capacitor
C. The size of the capacitor being quite big
D. The statement is incorrect
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The product of apparent power and cosine of the phase angle between circuit voltage and current is
A. True power
B. Reactive power
C. Volt-amperes
D. Instantaneous power
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An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms?
A. The current through the resistance is more
B. The current through the resistance is less
C. Both resistance and inductance carry equal currents
D. None of the above
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In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will__________?
A. Be reduced by half
B. Be doubled
C. Be four times at high
D. Be reduced to one fourth
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In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will__________?
A. Be reduced by half
B. Be doubled
C. Be four times as high
D. Be reduced to one fourth
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The power factor of a D.C. circuit is always__________?
A. Less than unity
B. Unity
C. Greater than unity
D. Zero
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Word of the Day
18 Jul
Proactive
(of a person or action) creating or controlling a situation rather than just responding to it after it has happened.
فعال، پیش قدمی کے ذریعے صورتحال پر قابو پانیوالا

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