electrical engineering MCQs – Page 97

Practise multiple-choice questions from electrical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

electrical engineering Mcqs
1. economics of power generation2. analog electronics3. solid state switching circuits4. parallel circuits5. switchgear and protection6. op amp circuits7. transistor audio power amplifiers8. electrostatics9. heating and welding10. multi stage transistor amplifiers11. passive filters12. network theorems13. regulated d c power supply14. a c fundamentals circuits and circuit theory15. electromagnetic induction16. power electronics17. magnetism and electromagnetism18. transformers19. modulation and demodulation20. d c generators21. semiconductor theory22. single phase induction motors23. semiconductor diode24. hybrid parameters25. digital electronics26. oscillators27. earthing or grounding28. single stage transistor amplifiers29. d c motors30. transistor biasing31. amplifiers with negative feedback32. basic electrical33. electronic instruments34. synchronous motors35. field effect transistors fet36. magnetic circuit37. control systems38. industrial drives39. power generation40. series parallel circuits41. transistor tuned amplifiers42. electrical engineering materials43. rectifiers and converters44. integrated circuits45. scr silicon controlled rectifiers46. cables47. polyphase induction motors48. measurement and instrumentation49. transistors50. electrical machine design51. electrolysis and storage of batteries52. electric traction53. transmission and distribution
1921. Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it___________?
comments icon0

A. produces fringing

B. lowers their power efficiency

C. leads to their increased weight

D. increases their cost of manufacture

1922. Which of the following capacitors has relatively shorter shelf life____________?
comments icon0

A. Ceramic capacitor

B. Paper capacitor

C. Electrolytic capacitor

D. Mica capacitor

1923. In a capacitor the electric charge is stored in____________?
comments icon0

A. metal plates

B. dielectric

C. both (A) and (B)

D. none of the above

1924. Which of the following is not a vector ___________?
comments icon0

A. Linear momentum

B. Angular momentum

C. Electric field

D. Electric potential

1925. The applications of selenium rectifiers are usually limited to potential of_____________?
comments icon0

A. 200 V

B. 10 V

C. 30 V

D. 100 V

E. 60 V

1926. Which of the following statements is incorrect _________________?
comments icon0

A. The leakage resistance of ceramic capacitors is generally high

B. The stored energy in a capacitor increases with applied voltage

C. A wire cable has distributed capacitance between the conductors

D. The stored energy in a capacitor decreases with reduction in value of capacitance
1927. If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be____________?
comments icon0

A. small

B. none of the above

C. large

D. zero

1928. The rate of rise of current through an inductive coil is maximum_____________?
comments icon0

A. after one time constant

B. near the final maximum value of current

C. at 63.2% of its maximum steady value

D. at the start of the current flow
1929. Which of the following circuit element stores energy in the electromagnetic field ?
comments icon0

A. Resistance

B. Inductance

C. Condenser

D. Variable resistor

1930. Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as_____________?
comments icon0

A. pico-coulomb

B. milli-coulomb

C. micro-coulomb

D. coulomb

1931. The relative permittivity of free space is given by__________?
comments icon0

A. 10

B. 1

C. 1000

D. 100

1932. If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be____________?
comments icon0
A. 1200 uC

B. 900 uC

C. 1600 uC

D. 800 uC

1933. The unit of magnetic flux is______________?
comments icon0

A. henry

B. weber

C. ampere/metre

D. ampereturn/weber

1934. A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is___________?
comments icon0
A. 100 kV/m

B. 10 kV/m

C. 5 kV/m

D. 2 kV/m

1935. A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by________________?
comments icon0

A. the resistance of magnetic path

B. variation in voltage to the coil

C. variation in coil current

D. change of number of turns of coil

1936. The relative permeability of a ferromagnetic material is_____________?
comments icon0

A. less than one

B. more than 10

C. more than one

D. more than 100 or 1000
1937. Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be_____________?
comments icon0
A. doubled

B. unaffected

C. halved

D. quadrupled

1938. In the case of a lossy capacitor, its series equivalent resistance value will be_______________?
comments icon0

A. zero

B. large

C. small

D. very small

1939. The capacitor preferred for high frequency circuits is_____________?
comments icon0

A. electrolytic capacitor

B. none of the above

C. mica capacitor

D. air capacitor

1940. In a cable capacitor, voltage gradient is maximum at the surface of the______________?
comments icon0

A. sheath

B. insulator

C. earth

D. conduction