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3. 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?
2. The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of
1. Power factor of an inductive circuit is usually improved by connecting capacitor to it in
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5. If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is
4. In an AC. circuit, a low value of kVAR compared with kW indicates
3. The r.m.s. value of half wave rectified sine wave is 200 V. The r.m.s. value of full wave rectified A(C) will be
2. The phosphors for which of the following pair are 180° out of phase for VL, VC and VR?
1. The r.m.s value of pure cosine function is
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4. Power factor of the following circuit will be zero
3. In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value
2. In a series resonant circuit, the impedance of the circuit is
