Electric CircuitsElectronic Engineering Mcqs 100+ MCQ & Answer Electric Circuits| page-07 |Electric Engineering MCQ And Answer 27/01/2025 DSN MARATHI Last Updated on: 28/10/2025 61. 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 Answer Option : B 62. In a sine wave the slope is constant A. Between 0° and 90° B. Between 90° and 180° C. Between 180° and 270° D. No where Answer Option : D 63. The r.m.s. value of pure cosine function is A. 0.5 of peak value B. 0.707 of peak value C. Same as peak value D. Zero Answer Option : B 64. 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 Answer Option : A 65. Capacitors for power factor correction are rated in A. kW B. kVA C. kV D. kVAR Answer Option : D 66. The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes __________ ohms. A. 2.5 B. 5 C. 10 D. 15 Answer Option : C 67. For the same peak value which of the following wave will ‘have the highest r.m.s. value? A. Square wave B. Half wave rectified sine wave C. Triangular wave D. Sine wave Answer Option : A 68. The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of ________ degrees. A. 90 B. 60 C. 45 D. 30 Answer Option : C 69. Power factor of an inductive circuit is usually improved by connecting capacitor to it in A. Parallel B. Series C. Either (A) or (B) D. None of the above Answer Option : A 70. In the case of an unsymmetrical alternating current the average value must always be taken over A. Unsymmetrical part of the wave form B. The quarter cycle C. The half cycle D. The whole cycle Answer Option : D
61. 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 Answer Option : B
62. In a sine wave the slope is constant A. Between 0° and 90° B. Between 90° and 180° C. Between 180° and 270° D. No where Answer Option : D
63. The r.m.s. value of pure cosine function is A. 0.5 of peak value B. 0.707 of peak value C. Same as peak value D. Zero Answer Option : B
64. 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 Answer Option : A
66. The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes __________ ohms. A. 2.5 B. 5 C. 10 D. 15 Answer Option : C
67. For the same peak value which of the following wave will ‘have the highest r.m.s. value? A. Square wave B. Half wave rectified sine wave C. Triangular wave D. Sine wave Answer Option : A
68. The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of ________ degrees. A. 90 B. 60 C. 45 D. 30 Answer Option : C
69. Power factor of an inductive circuit is usually improved by connecting capacitor to it in A. Parallel B. Series C. Either (A) or (B) D. None of the above Answer Option : A
70. In the case of an unsymmetrical alternating current the average value must always be taken over A. Unsymmetrical part of the wave form B. The quarter cycle C. The half cycle D. The whole cycle Answer Option : D
