Explore topic-wise MCQs in Electrical Engineering Questions.

This section includes 180 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

101.

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
102.

at a point is equal to the negative potential gradient at that point?
A. Electric intensity
B. Electric flux
C. Magnetic flux
D. Magnetic flux density
Answer» B. Electric flux
Discussion
103.

Electric field intensity is a quantity_____________?
A. scalar
B. vector
C. both A. and (6)
D. none of the above
Answer» C. both A. and (6)
Discussion
104.

While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is____________?
A. short-circuited
B. open circuited
C. alright
D. leaky
Answer» E.
Discussion
105.

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
106.

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
Answer» E.
Discussion
107.

Energy stored in the electric field of a capacitor C when charged from a D.C source of voltage V is equal to joules_______________?
A. CV2
B. C2V
C. CV2
D. CV
Answer» B. C2V
Discussion
108.

What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?
A. 50 pF
B. 100 pF
C. 150 pF
D. 200 pF
Answer» C. 150 pF
Discussion
109.

The capacitor preferred for high frequency circuits is_____________?
A. air capacitor
B. mica capacitor
C. electrolytic capacitor
D. none of the above
Answer» C. electrolytic capacitor
Discussion
110.

“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
Answer» B. Kirchhoff s law
Discussion
111.

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
112.

capacitors can be used only for D.C ?
A. Air
B. Paper
C. Mica
D. Electrolytic
Answer» E.
Discussion
113.

is that property of a capacitor which delays any change of voltage across it ?
A. inductance
B. Capacitance
C. Potential gradient
D. None of the above
Answer» C. Potential gradient
Discussion
114.

One volt is the same as___________?
A. one joule/coulomb
B. one coulomb/joule
C. one coulomb
D. one joule
Answer» B. one coulomb/joule
Discussion
115.

The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as____________?
A. pholoelectric effect
B. chemical effect
C. magnetic effect
D. induction
Answer» E.
Discussion
116.

The number of Faraday tubes of flux passing through a surface in an electric field is called____________?
A. electric flux
B. electric flux density
C. magnetic flux density
D. electric charge density
Answer» B. electric flux density
Discussion
117.

Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleration of an electron placed between them is______________?
A. 0.56 x 1015 m/s2
B. 1.5 x 1015 m/s2
C. 1.6 x 1015 m/s2
D. 1.76 x 1015 m/s2
Answer» E.
Discussion
118.

The value of E within the field due to a point charge can be found with the help of___________?
A. Faraday’s laws
B. Kirchhoff s laws
C. Coulomb’s laws
D. none of the above
Answer» D. none of the above
Discussion
119.

Dielectric strength _________ with increasing thickness
A. increases
B. decreases
C. remains unaltered
D. none of the above
Answer» C. remains unaltered
Discussion
120.

The unit of dielectric strength is given by___________?
A. V/m
B. V2/m
C. m/V
D. m/V2
Answer» B. V2/m
Discussion
121.

A region around a stationary electric charge has__________?
A. an electric field
B. a magnetic field
C. both A. and (b)
D. none of the above
Answer» B. a magnetic field
Discussion
122.

In a capacitor, the electric charge is stored in_________?
A. metal plates
B. dielectric
C. dielectric as well as metal plates
D. none of the above
Answer» C. dielectric as well as metal plates
Discussion
123.

Electric displacement is a__________quantity
A. scalar
B. vector
C. both of the above
D. none of the above
Answer» C. both of the above
Discussion
124.

The bridge used for the measurement of the value of the capacitance is____________?
A. Wien’s bridge
B. Wheatstone bridge
C. Schering bridge
D. Hay’s bridge
Answer» D. Hay’s bridge
Discussion
125.

An uncharged conductor is placed near a charged conductor, then_____________?
A. the uncharged conductor gets charged by conduction
B. the uncharged conductor gets charged by induction and then attracted towards the charging body
C. the uncharged conductor is attracted first and then charged by induction
D. it remains as such
Answer» C. the uncharged conductor is attracted first and then charged by induction
Discussion
126.

The capacitance between two plates increases with____________?
A. shorter plate area and higher applied voltage
B. shorter plate area and shorter distance between them
C. larger plate area, longer distance between plates and higher,applied voltage
D. larger plate area and shorter distance between plates
Answer» E.
Discussion
127.

Mica capacitors are characterized by all of the following except___________?
A. stable operation
B. accurate value
C. low leakage reactance
D. low losses
Answer» D. low losses
Discussion
128.

Out of the following capacitors of identical rating which one will have the smallest dimensions ___________ ?
A. Aluminium foil capacitor
B. Mica capacitor
C. Ceramic capacitor
D. Paper capacitor
Answer» D. Paper capacitor
Discussion
129.

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
130.

Which of the following statements is correct ?
A. Mica capacitors are available in capacitance values of 5 to 20 uF
B. Air capapitors have a black band to indicate the outside foil
C. Electrolytic capacitors must be connected in correct polarity
D. Ceramic capacitors must be connected in correct polarity
Answer» D. Ceramic capacitors must be connected in correct polarity
Discussion
131.

For a good 0.05 uF capacitor ohmmeter reading should___________?
A. show low resistance momentarily and back off to a very high resistance
B. show high resistance momentarily and then a very low resistance
C. go quickly to 50 ohm approximately and remain there
D. not move at all
Answer» B. show high resistance momentarily and then a very low resistance
Discussion
132.

The ohmmeter reading for a short circuited capacitor is____________?
A. infinity
B. few kilo ohms
C. few megohms
D. zero
Answer» E.
Discussion
133.

In order to remove static electricity from machinery___________?
A. construct insulated cabins
B. insulate the machinery
C. ground the framework
D. humidify the surroundings
Answer» D. humidify the surroundings
Discussion
134.

A capacitance is a circuit component that opposes the change in circuit__________?
A. Current
B. Voltage
C. impedance
D. None of the above
Answer» C. impedance
Discussion
135.

Which of the following capacitors will have the least value of breakdown voltage________ ?
A. Mica
B. Paper
C. Ceramic
D. Electrolytic
Answer» E.
Discussion
136.

Which capacitor will be physically smaller for the same ratings ___________?
A. Ceramic capacitor
B. Paper capacitor
C. Both will be of equal size
D. None of the above
Answer» B. Paper capacitor
Discussion
137.

The units of volume charge density are___________?
A. Coulomb/meter
B. Coulomb/meter
C. Coulomb/meter
D. Coulomb/meter
Answer» D. Coulomb/meter
Discussion
138.

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
139.

A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is___________?
A. 100 kV/m
B. 10 kV/m
C. 5 kV/m
D. 2 kV/m
Answer» B. 10 kV/m
Discussion
140.

The minimum value of potential gradient in a cable occurs in____________?
A. insulation
B. conductor
C. outer sheath
D. uniformly all over
Answer» B. conductor
Discussion
141.

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
142.

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
143.

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
144.

Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them_____________?
A. all in series
B. all in parallel
C. two in parallel and third in series with this combination
D. two in series and third in parallel across this combination
Answer» D. two in series and third in parallel across this combination
Discussion
145.

A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance _______?
A. Ceramic capacitor
B. Mica capacitor
C. Both will have identical value of capacitance
D. It depends on applied voltage
Answer» B. Mica capacitor
Discussion
146.

The relative permittivity of free space is given by__________?
A. 1
B. 10
C. 100
D. 1000
Answer» B. 10
Discussion
147.

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
148.

The capacity of capacitor bank used in power factor correction is expressed in terms of____________?
A. kW
B. kVA
C. kVAR
D. volts
Answer» D. volts
Discussion
149.

The sparking between two electrical contacts can be reduced by inserting a___________?
A. capacitor in parallel with contacts
B. capacitor in series with each contact
C. resistance in line
D. none of the above
Answer» B. capacitor in series with each contact
Discussion
150.

Capacitance increases with_____________?
A. increase in plate area and decrease in distance between the plates
B. increase in plate area and distance between the plates
C. decrease in plate area and value of applied voltage
D. reduction in plate area and distance between the plates
Answer» B. increase in plate area and distance between the plates
Discussion