41. What is the half-power bandwidth of a parallel resonant circuit which has a resonant frequency of 3.6 MHz and Q of 218?
A. 16.5 kHz
B. 1.65 kHz
C. 16.5 MHz
D. 165 kHz
42. Which one of the following elements serves as a protection against overload?
A. Fuse
B. Switch
C. Resistor
D. Relay
43. Transient period is considered over after
A. 5 TAA
B. 1 Taa
C. 100 Taa
D. 6 Taa
44. What rating of a resistor determines its ability to absorb heat?
A. Wattage
B. Ohmic
C. Current
D. Voltage
45. An open inductor has:
A. Zero resistance and infinite inductance
B. Infinite resistance and infinite inductance
C. Infinite resistance and zero inductance
D. Zero resistance and zero inductance
46. What is the reading of an ohmmeter for a shorted capacitor?
B. Zero
C. Infinity
D. k Ohm
E. M Ohm
47. What capacitance exists not through design but simply because two conducting surfaces are relatively close to each other?
A. Surge
B.Stray
C. Natural
D. Normal
48. The average value of a triangular or sawtooth wave is_______ times its peak value.
A. 0.577
B. 0.500
C. 0.318
D. 0.637
49. A series RLC circuit consists of a 10 Ohm resistor in series with L = 10 µH, and C = 100 µF. Determine a new value of I, for which the resonant frequency is one —half the original value.
A. 40uH
B. 40 mH
C. 40 pH
D. 40 nH
50. What is the peak factor of a triangular wave?
A. 1.16
B. 1.73
C. 1.41
D. 1.11
51. Effects of capacitance:
A. It opposes any change in the amount of voltage
B. Voltage is lagged behind the current by a quarter cycle
C. Electric energy is stored in the capacitor in the form of electrostatic field
D. All of the above
52. Points to be considered in choosing a capacitor
A. Working voltage
B. Type of dielectric
C. Capacitance
D. All of the above
53. Permeability is otherwise known as
A. Magnetic conductivity
B. Magnetic susceptibility
C. Electric conductivity
D. Electric susceptibility
54. The impedance in the study of electronics is represented by resistance and
A. Reactance
B. Inductance
C. Capacitance
D. Inductance and capacitance
55. Loop currents should be assumed to flow in which direction
A. Straight
B. Clockwise
C. Counter-clockwise
D. Either B or C arbitrarily
56. What determines the direction of induced emf in a conductor or coil?
A. Corkscrew rule
B. Fleming's left hand rule
C. Fleming’s right hand rule
D. Ampere's circuital law
57. The reason why electrical appliances are connected in parallel.
A. It is a simple circuit
B. This makes the operation of appliances independent of each other
C. This results in reduced power consumption
D. All of the above
58. Which of the following does not affect resistance?
A. Mass
B. Resistivity
C. Cross-sectional area
D. Length
59. Which of the following is not considered a physical factor affecting resistance?
A. Temperature
B. Length
C. Material type
D. Cross-sectional
60. A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20,000 ohms?
A. 1.5
B. 1.25
C. 2.5
D. 0.5
61. A trigger circuit consisting of a capacitor of 0.01 µF is connected in series with a resistor. If the circuit requires 100 Vdc to operate, determine the value of the resistor when time constant is 0.009s.
A. 900 Ohm
B. 900 MOhm
C. 900 KOhm
D. 900 GOhm
62. The graph between an alternating quantity and time is called
A. Sine wave
B. Curve
C. Waveform
D. A plot
63. Which of the following is the most popular waveform?
A. Sinusoidal
B. Square wave
C. Triangular
D. Sawtooth
64. Which of the following does not refer to electrical energy?
A. Joule
B. Volt-Ampere
C. Watt-second
D. Volt-coulomb
65. What is the resonant frequency of a circuit when L of 25 micro henrys and C of 10 pico farads are in parallel?
A. 10.1 kHz
B. 10.1 MHz
C. 101 MHz
D. 101 kHz
66. And ideal current source has an internal conductance of_______ Siemen(s)
A. Infinite
B. Zero
C. One
D. One million
67. A capacitance of 6 µµF means
A. 6 pF
B. 6 nF
C. 6 uF
D. 6 aF
68. The voltage cannot be exactly in phase with the current in a circuit that contains:
B. Only Capacitance
C. Only resistance
D. Inductance and capacitance
E. Inductance, capacitance and resistance
69. The charge in the capacitor is stored at the:
A. Terminals
B. Plates
C. Dielectric
D. Air
70. The reactance curve is a plot of frequency versus_________ for a series RLC circuit
A. Voltage
B. Current
C. Gain
D. Impedance
