A. both waves must have same frequency
B. both waves must have identical peak values
C. both waves must have zero value at the same time
D. none of the above
Related Mcqs:
- The power consumed in a circuit element will be least when the phase difference between the current and voltage is__________?
A. 180″
B. 90°
C. 60°
D. 0° - The power consumed in a circuit element will be least when the phase difference between the current and voltage is________?
A. 180″
B. 90°
C. 60°
D. 0° - 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___________?
A. 282.8 V
B. 141.4 V
C. 111 V
D. 100 V - The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces__________?
A. the more heat than produced by A.C. when flowing through the same circuit
B. the same heat as produced by A.C. when flowing through the same circuit
C. the less heat than produced by A.C. flowing through the same circuit
D. none of the above - 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 - Which of the following circuit component opposes the change in the circuit voltage ?
A. Inductance
B. Capacitance
C. Conductance
D. Resistance - 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________ ?
A. 0°
B. 45°
C. 90°
D. 180° - In a parallel R-C circuit, the current always________the applied voltage?
A. lags
B. leads
C. remains in phase with
D. none of the above - Two waves of the same frequency have opposite phase when the phase angle between them is_________?
A. 360°
B. 180°
C. 90°
D. 0° - 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_________?
A. 4 kVAR
B. 6 kVAR
C. 8 kVAR
D. 16 kVAR
