185 + Mcqs in Electrostatics Page 2 McqOptions

51.	*$_Which of the following is not a vector ??
A.	Linear momentum
B.	Angular momentum
C.	Electric field
D.	Electric potential
Answer» E.

Discussion

52.	*$_1 volt/meter is same as?
A.	1 meter/coulomb
B.	1 newton meter
C.	1 newton/meter
D.	1 joule/coulomb
Answer» D. 1 joule/coulomb

Discussion

53.	/_Mica capacitors are characterised by all of the following except?
A.	stable operation
B.	accurate value
C.	low leakage reactance
D.	low losses
Answer» D. low losses

Discussion

54.	/_Which of the following material has least value of dielectric constant ??
A.	Ceramics
B.	Oil
C.	Glass
D.	Paper
Answer» C. Glass

Discussion

55.	/_The lines of force due to charged particles are?
A.	always straight
B.	always curved
C.	sometimes curved
D.	none of the above
Answer» C. sometimes curved

Discussion

56.	/_The potential gradient across the material of low permittivity is than across the material of high permittivity.?
A.	smaller
B.	greater
C.	both (A) and (B)
D.	none of the above
Answer» C. both (A) and (B)

Discussion

57.	/_The presence of an uncharged conductor near a charged one increases the?
A.	charge of the charged conductor
B.	capacity of the charged conductor
C.	potential of the charged conductor
D.	all of the above
Answer» C. potential of the charged conductor

Discussion

58.	/_What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ??
A.	It will become magnetic
B.	It will melt
C.	It will get punctured or cracked
D.	Its molecular structure will get changed
Answer» D. Its molecular structure will get changed

Discussion

59.	/_Which is the most superior dielectric out of the following ??
A.	Air
B.	Glass
C.	Bakelite
D.	Paper
Answer» D. Paper

Discussion

60.	/_Dielectric strength of a medium is usually expressed in?
A.	J/mm
B.	C/m¬¨‚â§
C.	kV/mm
D.	N/mm
Answer» D. N/mm

Discussion

61.	/_Paper capacitors usually have a tolerance of?
A.	¬¨¬± 5%
B.	¬¨¬± 10%
C.	¬¨¬± 15%
D.	¬¨¬± 20%
Answer» C. ¬¨¬± 15%

Discussion

62.	/_The force between two charges is 120 N. If the distance between the charges is doubled, the force will be?
A.	60 N
B.	30 N
C.	40 N
D.	15 N
Answer» C. 40 N

Discussion

63.	/_Dielectric strength of medium?
A.	increases with rise in temperature
B.	increases with moisture content
C.	is same for all insulating materials
D.	none of the above
Answer» E.

Discussion

64.	/_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
Answer» C. Paper capacitor

Discussion

65.	/_An electrolytic capacitor is generally made to provide?
A.	low capacitance
B.	fixed capacitance
C.	variable capacitance
D.	large value of capacitance
Answer» E.

Discussion

66.	/_In a capacitive circuit?
A.	a steady value of applied voltage causes discharge
B.	an increase in applied voltage makes a capacitor charge
C.	decrease in applied voltage makes a capacitor charge
D.	none of the above
Answer» C. decrease in applied voltage makes a capacitor charge

Discussion

67.	/_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
Answer» C. Ceramic disc capacitor

Discussion

68.	/_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
Answer» D. 300 to 500 kV/mm

Discussion

69.	/_The units of volume charge density are?
A.	Coulomb/meter
B.	Coulomb/meter
C.	Coulomb/meter
D.	Coulomb/meter
Answer» D. Coulomb/meter

Discussion

70.	/_The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as?
A.	Photoelectric effect
B.	Chemical effect
C.	Magnetic effect
D.	Induction
Answer» E.

Discussion

71.	/_Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the?
A.	Voltage across the plates increases
B.	Voltage across the plates decreases
C.	Charge on the capacitor decreases
D.	Charge on the capacitor increases
Answer» C. Charge on the capacitor decreases

Discussion

72.	/_The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value.?
A.	37, initial
B.	62, initial
C.	62, final
D.	37, final
Answer» D. 37, final

Discussion

73.	/_Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ??
A.	50
B.	100
C.	150
D.	200
Answer» C. 150

Discussion

74.	%_capacitors are mainly used for radio frequency tuning._%
A.	Paper
B.	Air
C.	Mica
D.	Electrolytic
Answer» C. Mica

Discussion

75.	%_Which of the following capacitors will have the least value of breakdown voltage ?_%
A.	Mica
B.	Paper
C.	Ceramic
D.	Electrolytic
Answer» E.

Discussion

76.	_ A capacitor consists of two$?
A.	Ceramic plates and one mica disc
B.	Insulators separated by a dielectric
C.	Silver-coated insulators
D.	Conductors separated by an insulator
Answer» E.

Discussion

77.	_ A unit tube of flux is known as tube$?
A.	Newton
B.	Faraday
C.	Michale
D.	None of the above
Answer» C. Michale

Discussion

78.	_ A dielectric material must be$?
A.	resistor
B.	insulator
C.	good conductor
D.	semi conductor
Answer» C. good conductor

Discussion

79.	_ Which of the following capacitor is preferred in case of single phase motor ?$?
A.	Mica capacitor
B.	Paper capacitor
C.	Electrolytic capacitor
D.	Ceramic capacitor
Answer» D. Ceramic capacitor

Discussion

80.	_ The direction of electric field due +0 positive charge is .$?
A.	away from the charge
B.	towards the charge
C.	both (A) and (B)
D.	none of the above
Answer» B. towards the charge

Discussion

81.	_ For which of the following parameter variation, the capacitance of the capacitor remains unaffected ?$?
A.	Distance between plates
B.	Area of the plates
C.	Nature of dielectric
D.	Thickness of the plates
Answer» E.

Discussion

82.	_ The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be$?
A.	36 x 10 fa
B.	36 x 107 N
C.	36 x 108 N
D.	36 x 109 N
Answer» E.

Discussion

83.	_ 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
Answer» E.

Discussion

84.	_ If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will$?
A.	decrease
B.	increase
C.	remains unchanged
D.	become zero
Answer» C. remains unchanged

Discussion

85.	_ Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ?$?
A.	50
B.	100
C.	150
D.	200
Answer» C. 150

Discussion

86.	_ The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as$?
A.	Photoelectric effect
B.	Chemical effect
C.	Magnetic effect
D.	Induction
Answer» E.

Discussion

87.	_ The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value.$?
A.	37, initial
B.	62, initial
C.	62, final
D.	37, final
Answer» D. 37, final

Discussion

88.	_ Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the$?
A.	Voltage across the plates increases
B.	Voltage across the plates decreases
C.	Charge on the capacitor decreases
D.	Charge on the capacitor increases
Answer» C. Charge on the capacitor decreases

Discussion

89.	_ The units of volume charge density are$?
A.	Coulomb/meter
B.	Coulomb/meter
C.	Coulomb/meter
D.	Coulomb/meter
Answer» D. Coulomb/meter

Discussion

90.	_ ‚Äö√Ñ√∫The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface‚Äö√Ñ√π.The above statement is associated with$?
A.	Gauss‚Äö√Ñ√¥s law
B.	Kirchhoff's law
C.	Faraday‚Äö√Ñ√¥s law
D.	Lenz‚Äö√Ñ√¥s law
Answer» B. Kirchhoff's law

Discussion

91.	_ The value of E within the field due to a point charge can be found with the help of$?
A.	Faraday‚Äö√Ñ√¥s laws
B.	Kirchhoff's laws
C.	Coulomb‚Äö√Ñ√¥s laws
D.	none of the above
Answer» D. none of the above

Discussion

92.	_ A gang condenser is a$?
A.	polarised capacitor
B.	variable capacitor
C.	ceramic capacitor
D.	none of the above
Answer» C. ceramic capacitor

Discussion

93.	_ When a dielectric is placed in an electric field the field strength$?
A.	decreases
B.	increases
C.	reduces to zero
D.	remain unchanged
Answer» B. increases

Discussion

94.	_ The dissipation factor of a good dielectric is of the order of$?
A.	0.0002
B.	0.002
C.	0.02
D.	0.2
Answer» B. 0.002

Discussion

95.	_ Which of the following capacitors is marked for polarity ?$?
A.	Air
B.	Paper
C.	Mica
D.	Electrolytic
Answer» E.

Discussion

96.	_ Air capacitors are generally available in the range$?
A.	10 to 400 pF
B.	1 to 20 pF
C.	100 to 900 pF
D.	20 to 100 pF
Answer» B. 1 to 20 pF

Discussion

97.	_ A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is$?
A.	0.024 F
B.	0.12 F
C.	0.6 F
D.	0.8 F
Answer» B. 0.12 F

Discussion

98.	_ The ability of charged bodies to exert force on 6ne another is attributed to the existence of$?
A.	electrons
B.	protons
C.	neutrons
D.	electric field
Answer» E.

Discussion

99.	_ Dielectric strength of a material depends on$?
A.	moisture content
B.	temperature
C.	thickness
D.	all of the above
Answer» E.

Discussion

100.	_Dielectric strength ______ with increasing thickness$?
A.	increases
B.	decreases
C.	remains unaltered
D.	none of the above
Answer» C. remains unaltered

Discussion

Explore topic-wise MCQs in Electrical Engineering.

*$_Which of the following is not a vector ??

*$_1 volt/meter is same as?

*/*_Mica capacitors are characterised by all of the following except?

*/*_Which of the following material has least value of dielectric constant ??

*/*_The lines of force due to charged particles are?

*/*_The potential gradient across the material of low permittivity is than across the material of high permittivity.?

*/*_The presence of an uncharged conductor near a charged one increases the?

*/*_What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ??

*/*_Which is the most superior dielectric out of the following ??

*/*_Dielectric strength of a medium is usually expressed in?

*/*_Paper capacitors usually have a tolerance of?

*/*_The force between two charges is 120 N. If the distance between the charges is doubled, the force will be?

*/*_Dielectric strength of medium?

*/*_Which of the following capacitors can be used for temperature compensation ??

*/*_An electrolytic capacitor is generally made to provide?

*/*_In a capacitive circuit?

*/*_For closer tolerances which of the following capacitors is usually preferred ??

*/*_Dielectric strength of mica is?

*/*_The units of volume charge density are?

*/*_The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as?

*/*_Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the?

*/*_The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value.?

*/*_Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ??

%_capacitors are mainly used for radio frequency tuning._%

%_Which of the following capacitors will have the least value of breakdown voltage ?_%

_ A capacitor consists of two$?

_ A unit tube of flux is known as tube$?

_ A dielectric material must be$?

_ Which of the following capacitor is preferred in case of single phase motor ?$?

_ The direction of electric field due +0 positive charge is .$?

_ For which of the following parameter variation, the capacitance of the capacitor remains unaffected ?$?

_ The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be$?

_ The dielectric constant (relative permittivity) of glass is given by$?

_ If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will$?

_ Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ?$?

_ The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as$?

_ The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value.$?

_ Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the$?

_ The units of volume charge density are$?

_ ‚Äö√Ñ√∫The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface‚Äö√Ñ√π.The above statement is associated with$?

_ The value of E within the field due to a point charge can be found with the help of$?

_ A gang condenser is a$?

_ When a dielectric is placed in an electric field the field strength$?

_ The dissipation factor of a good dielectric is of the order of$?

_ Which of the following capacitors is marked for polarity ?$?

_ Air capacitors are generally available in the range$?

_ A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is$?

_ The ability of charged bodies to exert force on 6ne another is attributed to the existence of$?

_ Dielectric strength of a material depends on$?

_Dielectric strength ______ with increasing thickness$?

/_Mica capacitors are characterised by all of the following except?

/_Which of the following material has least value of dielectric constant ??

/_The lines of force due to charged particles are?

/_The potential gradient across the material of low permittivity is than across the material of high permittivity.?

/_The presence of an uncharged conductor near a charged one increases the?

/_What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ??

/_Which is the most superior dielectric out of the following ??

/_Dielectric strength of a medium is usually expressed in?

/_Paper capacitors usually have a tolerance of?

/_The force between two charges is 120 N. If the distance between the charges is doubled, the force will be?

/_Dielectric strength of medium?

/_Which of the following capacitors can be used for temperature compensation ??

/_An electrolytic capacitor is generally made to provide?

/_In a capacitive circuit?

/_For closer tolerances which of the following capacitors is usually preferred ??

/_Dielectric strength of mica is?

/_The units of volume charge density are?

/_The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as?

/_Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the?

/_The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value.?

/_Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ??