61. Which of the following capacitors is marked for polarity ?
A. Air
B. Paper
C. Mica
D. Electrolytic
D. Electrolytic
62. Which of the following capacitors can be used for temperature compensation ?
A. Air capacitor
B. Ceramic capacitor
C. Paper capacitor
D. None of the above
B. Ceramic capacitor
63. Which of the following statements is incorrect ?
A. The thinner the dielectric, the more the capacitance and the lower the voltage breakdown
rating for a capacitor .
B. A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance
value of 500 pF
C. Capacitors in series provide less capacitance but a higher voltage breakdown rating for the
combination
D. A capacitor can store charge because it has a dielectric between two conductors
B. A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF
64. Paper capacitors usually have a tolerance of
A. ± 5%
B. ± 10%
C. ± 15%
D. ± 20%
B. ± 10%
65. For closer tolerances which of the following capacitors is usually preferred ?
A. Paper capacitor
B. Mica capacitor
C. Ceramic disc capacitor
D. None of the above
B. Mica capacitor
66. The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be
A. 36 x 10fa
B. 36 x 107 N
C. 36 x 108 N
D. 36 x 109 N
D. 36 x 109 N
67. The units of volume charge density are
A. Coulomb/metre
B. Coulomb/metre
C. Coulomb/metre
D. Coulomb/metre
. Coulomb/metre
68. capacitors are mainly used for radio frequency tuning.
A. Paper
B. Air
C. Mica
D. Electrolytic
B. Air
69. “The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface”. The above statement is associated with
A. Gauss’s law
B. Kirchhoff s law
C. Faraday’s law
D. Lenz’s law
A. Gauss’s law
70. Dielectric strength of mica is
A. 10 to 20 kV/mm
B. 30 to 50 kV/mm
C. 50 to 200 kV/mm
D. 300 to 500 kV/mm
C. 50 to 200 kV/mm
71. The dielectric constant (relative permittivity) of glass is given by
A. 0.1 to 0.4
B. 0.5 to 1.0
C. 2.0 to 4.0
D. 5 to 100
D. 5 to 100
72. capacitors can be used only for D.C.
A. Air
B. Paper
C. Mica
D. Electrolytic
D. Electrolytic
73. capacitors are used in transistor circuits.
A. Ceramic
B. Paper
C. Air
D. Electrolytic
A. Ceramic
74. capacitors are used for audio frequency and radio frequency coupling and
tuning.
A. Air
B. Mica
C. Plastic film
D. Ceramic
B. Mica
75. The inverse of capacitance is called
A. reluctance
B. conductance
C. susceptance
D. elastance
D. elastance
