Electric CircuitsElectronic Engineering Mcqs 100+ MCQ & Answer Electric Circuits| page-05 |Electric Engineering MCQ And Answer January 27, 2025 DSN MARATHI 41. The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of A. Iron loss in core B. Skin effect C. Increase in temperature D. Capacitive effect between adjacent coil turns Answer Option : A 42. Skin effect occurs when a conductor carries current at _________ frequencies. A. Very low B. Low C. Medium D. High Answer Option : D 43. Which of the following refers to a parallel circuit? A. The current through each element is same B. The voltage across element is in proportion to it’s resistance value C. The equivalent resistance is greater than any one of the resistors D. The current through any one element is less than the source current Answer Option : D 44. The frequency of domestic power supply in India is A. 200 Hz B. 100 Hz C. 60 Hz D. 50 Hz Answer Option : D 45. The frequency of an alternating current is A. The speed with which the alternator runs B. The number of cycles generated in one minute C. The number of waves passing through a point in one second D. The number of electrons passing through a point in one second Answer Option : C 46. 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 Answer Option : B 47. A sine wave has a frequency of 50 Hz. Its angular frequency is _______ radian/second. A. 100 n B. 50 jt C. 25 JT D. 5 n Answer Option : A 48. Two waves of the same frequency have opposite phase when the phase angle between them is A. 360° B. 180° C. 90° D. 0° Answer Option : B 49. 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° Answer Option : B 50. The time constant of a series R-C circuit is given by A. R/C B. RC2 C. RC D. R2C Answer Option : C
41. The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of A. Iron loss in core B. Skin effect C. Increase in temperature D. Capacitive effect between adjacent coil turns Answer Option : A
42. Skin effect occurs when a conductor carries current at _________ frequencies. A. Very low B. Low C. Medium D. High Answer Option : D
43. Which of the following refers to a parallel circuit? A. The current through each element is same B. The voltage across element is in proportion to it’s resistance value C. The equivalent resistance is greater than any one of the resistors D. The current through any one element is less than the source current Answer Option : D
44. The frequency of domestic power supply in India is A. 200 Hz B. 100 Hz C. 60 Hz D. 50 Hz Answer Option : D
45. The frequency of an alternating current is A. The speed with which the alternator runs B. The number of cycles generated in one minute C. The number of waves passing through a point in one second D. The number of electrons passing through a point in one second Answer Option : C
46. 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 Answer Option : B
47. A sine wave has a frequency of 50 Hz. Its angular frequency is _______ radian/second. A. 100 n B. 50 jt C. 25 JT D. 5 n Answer Option : A
48. Two waves of the same frequency have opposite phase when the phase angle between them is A. 360° B. 180° C. 90° D. 0° Answer Option : B
49. 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° Answer Option : B
50. The time constant of a series R-C circuit is given by A. R/C B. RC2 C. RC D. R2C Answer Option : C
