Electrostatics Mcqs – (Electrical Engineering) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests
“ Electrostatics Mcqs “. Tab this page to check “Latest Electrostatics MCQs” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others. The most occurred mcqs of Electrostatics in past papers. Past papers of Electrostatics mcqs. Past papers of Electrostatics MCQs. Mcqs are the necessary part of any competitive / job related exams. The Electrostatics mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Electrostatics mcqs. The Important series of Electrostatics Mcqs are given below:
If the distance between the two point charges become half then force between them becomes______________?
A. half
B. double
C. four times
D. remains same
The electric charge of 100 °C is 13cm apart from another charge 16.9°C electric force between them is_____________?
A. 9x105N
B. 900N
C. 9x107N
D. 9x106N
Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become_____________?
A. 1/8th of its original value
B. 1/4th of its original value
C. 4 times of its original value
D. 8 times of its original value
An electric field can deflect_______________?
A. X-rays
B. Neutrons
C. Both glass rod and silk acquire a negative charge
D. None
Electric flux linked with a surface will be maximum when____________?
A. The surface makes an angle of 45°with the field
B. The surface is held perpendicular to the electric field
C. The surface is held parallel to the electric field
D. All of the above
The electric lines of force are____________?
A. imaginary
B. physically existing near the charges
C. physically existing every where
D. depends upon case
If free space between the plates of a capacitor is replaced by a dielectric_____________?
A. The potential difference remains constant capacittance decreases and energy increases
B. The potential difference remains constant capacittance and energy stored increases
C. The potential difference decreases but both capacitance and energy increase
D. both potential difference and capacitance decrease but energy increases
A hollow metallic sphere of 8cm diameter is charged with 4 x 10 8C. The potential on its surface will be_________________?
A. 90 volts
B. 9000 volts
C. 900 volts
D. zero
Potential difference is the work done in moving unit positive charge form one point to another________________?
A. in any direction
B. against electric intensity
C. in the direction of electric intensity
D. in the direction of electric flux
The value of the capacitance depends upon the________________?
A. thickness of the capacitor plates
B. voltage applied
C. geometry of the capacitor
D. dinsity of the capacitor plates
A 5 μF capacitor has a potential difference across its plates of 200 volts. The charge on the capacitor is____________?
A. 103 C
B. 10-5 C
C. 2.5 x 10-8 C
D. 4 x 103 C
Equivalent capacitance is greater than individual capacitances in_____________?
A. series combination
B. parallel combination
C. both of above
D. none of above
The number of electrons in one coulomb charge is equal to_______________?
A. 6.2 x 1018
B. 6.2 x 1021
C. 1.6 x 1019
D. 1.6 x 10-27
SI unit of the permittivity of free space is________________?
A. N-1mC-2
B. Nm2C2
C. NmC-1
D. N-1m-2C2
Value of εr for various dielectrics is always________________?
A. Equal to the unit
B. Less than unity
C. Larger than unit
D. No hard and fast rule
Which one of the following can be taken as the measure of electric intensity ?
A. VF/A
B. V/A
C. F/A
D. q/VA
Electric flux due to a point charge +q is______________?
A. 1/4IIɛ0. q/r2
B. q/ɛ0
C. 1/4IIɛ q/r
D. 4IIɛ0
N/C =_____________?
A. J/V
B. V/A
C. V/m
D. A/m
Photocopier and inject printer are dealt in________________?
A. Electrostatics
B. Capacitors
C. Charges in motion
D. Electric fields
If a charged rod is brought closer to a gas filled balloon then______________?
A. Balloon bursts
B. Radius decreases
C. Radius increase
D. Balloon squeezes
If metallic conductor is charged negatively then its weight______________?
A. First increases then decreases
B. Remains same
C. Decreases then increases
D. Increases for a while
If two charges are increased by two times then force_____________?
A. Increases 9 times
B. Decreases 9 times
C. Increases 4 times
D. Decreases 4 times
If mica sheet is placed between the plates of a capacitor the capacity_______________?
A. increases
B. increases then decreases
C. decreases
D. decreases then increases
If an electrons is allowed to move along the field in a non uniform electric field then it will follow__________________?
A. Curved path
B. Straight line
C. Spiral path
D. Circular path
Selenium becomes a conductor in light so it behaves like____________?
A. Capacitor
B. Photodiode
C. Light emitting diode
D. Semiconductor
In a charged capacitor the energy resides in________________?
A. nuclear field
B. electric field
C. magnetic hield
D. gravitational field
A capacitor is a perfect insulator for______________?
A. direct current
B. alternating current
C. both of above
D. none of above
A charge of 0.10C accelerated through a potential difference of 1000V acquires kinetic energy_______________?
A. 1000J
B. 100J
C. 200J
D. 100 eV
Electric intensity at infinite distance from the point charge is_____________?
A. zero
B. positive
C. infinite
D. negative
In a non-uniform electric field a polar molecule will experience____________?
A. Net force
B. Net torque
C. both series and parallel combinations
D. zero
Two oppositely charged balls A and B attract third conducting ball C when placed near them turn by turn. Then ball C must be______________?
A. negatively charged
B. electrically neutral
C. positively charged
D. positively and negatively charged
capacitor is to have an energy content of 20J it must be placed across a potential difference of________________?
A. 9 volts
B. 4 volts
C. 2 volts
D. 1 vol
A 25eV electron has a speed of______________?
A. 5 x 106m/sec
B. 3 x 106m/sec
C. 2 x 106m/sec
D. 4 x 106m/sec
Equipotential planes are_______________?
A. parallel to one another
B. intersecting
C. non parallel to one another
D. circular
The metallic spheres A and B of radii 2m and 4m respectively carry the same charge 4 x 10 8C. If the spheres are connected by a copper wire_______________?
A. charge will flow from A to B
B. no flow of charge will occur
C. charge will flow from B to A
D. both a and b are possible
Two similar charges each of one coulomb placed in air one meter apart repel each other with a force______________?
A. 9 x 109N
B. 9 x 109N
C. 9.2 x 104N
D. 9 x 107N
A closed surface contains two equal and opposite charges. The net electric flux from the surface will be________________?
A. positive
B. negative
C. zero
D. data is insufficient
Electric intensity being a vector quantity always points_______________?
A. along the direction of force experienced by a unit positive charge
B. perpendicular to the direction of force experienced by a uit positive charge
C. opposite to the direction of force experienced by a unit positive charge
D. any of above
An electric charge at rest produces_______________?
A. neither electric field nor magnetic field
B. only an electric field
C. only a magnetic field
D. both electric and magnetic fields
The force per unit charge is know as__________________?
A. electric potential
B. electric intensity
C. electric flux
D. all of above are same
Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________?
A. decrease
B. remain constant
C. increase
D. depends upon composition of dielectric
The minimum charge on any object cannot be less than_______________?
A. 1.6 x 10-19C
B. 9.1 x 109C
C. 3.2 x 10-19C
D. no definite value exist
When we rub a glass rod with a silk cloth then________________?
A. glass rod acquires negative charge while silk acquires positive charge
B. glass rod acquires positive charge while silk acquires negative charges
C. both glass rod and silk acquire positive charge
D. both glass rod and silk acquire negative charge
A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?
A. Ceramic capacitor
B. Paper capacitor
C. Electrolytic capacitor
D. Any-of the above
Which of the following capacitors is marked for polarity ?
A. Paper
B. Air
C. Mica
D. Electrolytic
The power dissipated in a pure capacitor is______________?
A. zero
B. proportional to value of capacitance
C. proportional to applied voltage
D. both (B) and (C) above
When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will______________?
A. become zero
B. decrease
C. increase
D. remain uncharged
A capacitor consists of_____________?
A. two insulators only
B. two conductors separated by an insulator
C. two insulators separated by a conductor
D. two conductors only
A paper capacitor is usually available in the form of_____________?
A. disc
B. rolled foil
C. tubes
D. meshed plates
The absolute permittivity of free space is given by_____________?
A. 8.854 x KT11 F/m
B. 8.854 x 1(T10 F/m)
C. 8.854 x 1(T9 F/m)
D. 8.854 x 10″12 F/m
Which of the following statements is incorrect ?
A. Capacitors in series provide less capacitance but a higher voltage breakdown rating for the combination
B. A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF
C. The thinner the dielectric, the more the capacitance and the lower the voltage breakdown rating for a capacitor .
D. A capacitor can store charge because it has a dielectric between two conductors
Which of the following capacitors can be used for temperature compensation ?
A. Paper capacitor
B. Ceramic capacitor
C. Air capacitor
D. None of the above
The value of dielectric constant for vacuum is taken as____________?
A. 4
B. 1
C. zero
D. 10
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. open circuited
B. short-circuited
C. alright
D. leaky
Electric field intensity is a quantity_____________?
A. scalar
B. vector
C. both of above
D. none of the above
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. CV2
C. C2V
D. CV
When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of_____________?
A. 4 joules
B. 2 joules
C. 6 joules
D. 8 joules
Dielectric constant for mica is nearly_____________?
A. 100
B. 200
C. 3 to 8
D. 1 to 2
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. 150 pF
B. 100 pF
C. 50 pF
D. 200 pF
The capacitor preferred for high frequency circuits is_____________?
A. electrolytic capacitor
B. mica capacitor
C. air capacitor
D. none of the above
If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be____________?
A. 900 uC
B. 800 uC
C. 1200 uC
D. 1600 uC
Which of the following material has least value of dielectric constant ?
A. Glass
B. Oil
C. Ceramics
D. Paper
For closer tolerances which of the following capacitors is usually preferred ?
A. Ceramic disc capacitor
B. Mica capacitor
C. Paper capacitor
D. None of the above
Paper capacitors usually have a tolerance of___________?
A. ± 15%
B. ± 10%
C. ± 5%
D. ± 20%
“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. Faraday’s law
C. Kirchhoff s law
D. Lenz’s law
capacitors can be used only for D.C ?
A. Paper
B. Air
C. Mica
D. Electrolytic
The dielectric constant (relative permittivity) of glass is given by___________?
A. 0.5 to 1.0
B. 0.1 to 0.4
C. 2.0 to 4.0
D. 5 to 100
The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be____________?
A. 36 x 107 N
B. 36 x 10fa
C. 36 x 108 N
D. 36 x 109 N
Dielectric strength of mica is___________?
A. 30 to 50 kV/mm
B. 10 to 20 kV/mm
C. 50 to 200 kV/mm
D. 300 to 500 kV/mm
capacitors are mainly used for radio frequency tuning?
A. Mica
B. Air
C. Paper
D. Electrolytic
When the dielectric is homogeneous,the potential gradient is_____________?
A. uniform
B. zero
C. non-uniform
D. any of the above
capacitors are used in transistor circuits?
A. Ceramic
B. Air
C. Paper
D. Electrolytic
The inverse of capacitance is called_______________?
A. conductance
B. reluctance
C. susceptance
D. elastance
____________field is associated with the capacitor?
A. Electric
B. Magnetic
C. Both of the above
D. None of the above
The total deficiency or excess of electrons in a body is known as____________?
A. voltage
B. current
C. potential gradient
D. charge
The potential gradient across the material of low permittivity is than across the material of high permittivity?
A. smaller
B. greater
C. both of the above
D. none of the above
A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is__________?
A. 150 joules
B. 50 joules
C. 200 joules
D. 250 joules
The number of Faraday tubes of flux passing through a surface in an electric field is called____________?
A. electric flux
B. magnetic flux density
C. electric flux density
D. electric charge density
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. 1.5 x 1015 m/s2
B. 0.56 x 1015 m/s2
C. 1.6 x 1015 m/s2
D. 1.76 x 1015 m/s2
The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as____________?
A. chemical effect
B. pholoelectric effect
C. magnetic effect
D. induction
The relative permittivity has the following units__________?
A. m/F
B. F/m
C. Wb/m
D. no units
A unit tube of flux is known as tube___________?
A. Michale
B. Faraday
C. Newton
D. None of the above
The value of E within the field due to a point charge can be found with the help of___________?
A. Kirchhoff s laws
B. Faraday’s laws
C. Coulomb’s laws
D. none of the above
at a point is equal to the negative potential gradient at that point?
A. Electric intensity
B. Magnetic flux
C. Electric flux
D. Magnetic flux density
Dielectric strength _________ with increasing thickness
A. remains unaltered
B. decreases
C. increases
D. none of the above
Electric intensity at any point in an electric field is equal to the at that point?
A. magnetic flux density
B. electric flux
C. potential gradient
D. none of the above
The unit of dielectric strength is given by___________?
A. V/m
B. m/V
C. V2/m
D. m/V2
Electric displacement is a__________quantity
A. scalar
B. vector
C. both
D. none
is that property of a capacitor which delays any change of voltage across it ?
A. Potential gradient
B. Capacitance
C. Inductance
D. None of the above
One volt is the same as___________?
A. one joule/coulomb
B. one coulomb
C. one coulomb/joule
D. one joule
Which medium has the least dielectric strength ____________?
A. Paraffin wax
B. Glass
C. Quartz
D. Air
Permittivity is expressed in_____________?
A. Weber/meter
B. Farad/meter
C. Farad/sq-m
D. Weber/sq-m
In a cable capacitor, voltage gradient is maximum at the surface of the______________?
A. sheath
B. conduction
C. earth
D. insulator
The property of a capacitor to store electricity is called its____________?
A. capacitance
B. energy
C. charge
D. none of the above
A capacitance of 100 fiF is connected in series with a resistance of 8000 £2. The time constant of the circuit is______________?
A. 0.4 s
B. 0.2 s
C. 0.6 s
D. 0.8 s
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. 62, initial
B. 37, initial
C. 62, final
D. 37, final
Dielectric strength of a material depends on_____________?
A. temperature
B. moisture content
C. thickness
D. all of the above
E. none of the above
1 volt/meter is same as___________?
A. 1 newton meter
B. 1 meter/coulomb
C. 1 newton/meter
D. 1 joule/coulomb
The bridge used for the measurement of the value of the capacitance is____________?
A. Wheatstone bridge
B. Wien’s bridge
C. Schering bridge
D. Hay’s bridge
The capacitance between two plates increases with____________?
A. shorter plate area and higher applied voltage
B. larger plate area, longer distance between plates and higher,applied voltage
C. shorter plate area and shorter distance between them
D. larger plate area and shorter distance between plates