Electrostatics MCQs

Option A: similar charges repel each other

Option B: dissimilar charges attract each other

Option C: repulsion is the sure test of electrification

Option D: an electrically neutral body is repelled both positively and negatively charged bodies

Correct Answer: an electrically neutral body is repelled both positively and negatively charged bodies ✔

Option A: the electric lines of force have no physical existence

Option B: they expand laterally and contract longitudinally

Option C: they do not cross each other and group together in dielectric

Option D: all the above statements are true

Correct Answer: all the above statements are true ✔

Option A: double

Option B: half

Option C: four times

Option D: remains same

Correct Answer: four times ✔

Option A: 9x107N

Option B: 900N

Option C: 9x105N

Option D: 9x106N

Correct Answer: 900N ✔

Option A: 1/4th of its original value

Option B: 1/8th of its original value

Option C: 4 times of its original value

Option D: 8 times of its original value

Correct Answer: 4 times of its original value ✔

Option A: Neutrons

Option B: X-rays

Option C: Both glass rod and silk acquire a negative charge

Option D: None

Correct Answer: None ✔

Option A: The surface is held parallel to the electric field

Option B: The surface is held perpendicular to the electric field

Option C: The surface makes an angle of 45°with the field

Option D: All of the above

Correct Answer: The surface is held perpendicular to the electric field ✔

Option A: imaginary

Option B: physically existing every where

Option C: physically existing near the charges

Option D: depends upon case

Correct Answer: imaginary ✔

Option A: The potential difference remains constant capacittance and energy stored increases

Option B: The potential difference remains constant capacittance decreases and energy increases

Option C: The potential difference decreases but both capacitance and energy increase

Option D: both potential difference and capacitance decrease but energy increases

Correct Answer: The potential difference decreases but both capacitance and energy increase ✔

Option A: 900 volts

Option B: 9000 volts

Option C: 90 volts

Option D: zero

Correct Answer: 9000 volts ✔

Option A: in the direction of electric intensity

Option B: against electric intensity

Option C: in any direction

Option D: in the direction of electric flux

Correct Answer: against electric intensity ✔

Option A: voltage applied

Option B: thickness of the capacitor plates

Option C: geometry of the capacitor

Option D: dinsity of the capacitor plates

Correct Answer: geometry of the capacitor ✔

Option A: 2.5 x 10-8 C

Option B: 10-5 C

Option C: 103 C

Option D: 4 x 103 C

Correct Answer: 10-5 C ✔

Option A: series combination

Option B: parallel combination

Option C: both series and parallel combinations

Option D: none of above

Correct Answer: parallel combination ✔

Option A: 6.2 x 1018

Option B: 1.6 x 1019

Option C: 6.2 x 1021

Option D: 1.6 x 10-27

Correct Answer: 6.2 x 1018 ✔

Option A: Nm2C2

Option B: N-1mC-2

Option C: NmC-1

Option D: N-1m-2C2

Correct Answer: N-1m-2C2 ✔

Option A: Less than unity

Option B: Equal to the unit

Option C: Larger than unit

Option D: No hard and fast rule

Correct Answer: Larger than unit ✔

Option A: F/A

Option B: V/A

Option C: VF/A

Option D: q/VA

Correct Answer: V/A ✔

Option A: 1/4IIɛ q/r

Option B: q/ɛ0

Option C: 1/4IIɛ0. q/r2

Option D: 4IIɛ0

Correct Answer: q/ɛ0 ✔

Option A: V/A

Option B: J/V

Option C: V/m

Option D: A/m

Correct Answer: V/m ✔

Option A: Electrostatics

Option B: Charges in motion

Option C: Capacitors

Option D: Electric fields

Correct Answer: Electrostatics ✔

Option A: Radius decreases

Option B: Balloon bursts

Option C: Radius increase

Option D: Balloon squeezes

Correct Answer: Radius increase ✔

Option A: Remains same

Option B: First increases then decreases

Option C: Decreases then increases

Option D: Increases for a while

Correct Answer: Increases for a while ✔

Option A: Decreases 9 times

Option B: Increases 9 times

Option C: Increases 4 times

Option D: Decreases 4 times

Correct Answer: Increases 4 times ✔

Option A: increases

Option B: decreases

Option C: increases then decreases

Option D: decreases then increases

Correct Answer: increases ✔

Option A: Spiral path

Option B: Straight line

Option C: Curved path

Option D: Circular path

Correct Answer: Straight line ✔

Option A: Semiconductor

Option B: Photodiode

Option C: Light emitting diode

Option D: Capacitor

Correct Answer: Photodiode ✔

Option A: magnetic hield

Option B: electric field

Option C: nuclear field

Option D: gravitational field

Correct Answer: electric field ✔

Option A: direct current

Option B: alternating current

Option C: both for the direct and alternating current

Option D: none of above

Correct Answer: direct current ✔

Option A: 200J

Option B: 100J

Option C: 1000J

Option D: 100 eV

Correct Answer: 100J ✔

Option A: zero

Option B: infinite

Option C: positive

Option D: negative

Correct Answer: zero ✔

Option A: Net torque

Option B: Net force

Option C: both series and parallel combinations

Option D: zero

Correct Answer: both series and parallel combinations ✔

Option A: positively charged

Option B: electrically neutral

Option C: negatively charged

Option D: positively and negatively charged

Correct Answer: electrically neutral ✔

Option A: 4 volts

Option B: 9 volts

Option C: 2 volts

Option D: 1 vol

Correct Answer: 2 volts ✔

Option A: 2 x 106m/sec

Option B: 3 x 106m/sec

Option C: 5 x 106m/sec

Option D: 4 x 106m/sec

Correct Answer: 3 x 106m/sec ✔

Option A: parallel to one another

Option B: non parallel to one another

Option C: intersecting

Option D: circular

Correct Answer: parallel to one another ✔

Option A: charge will flow from A to B

Option B: charge will flow from B to A

Option C: no flow of charge will occur

Option D: both a and b are possible

Correct Answer: charge will flow from A to B ✔

Option A: 9 x 109N

Option B: 9.2 x 104N

Option C: 9 x 109N

Option D: 9 x 107N

Correct Answer: 9 x 109N ✔

Option A: negative

Option B: positive

Option C: zero

Option D: data is insufficient

Correct Answer: zero ✔

Option A: along the direction of force experienced by a unit positive charge

Option B: opposite to the direction of force experienced by a unit positive charge

Option C: perpendicular to the direction of force experienced by a uit positive charge

Option D: any of above

Correct Answer: along the direction of force experienced by a unit positive charge ✔

Option A: only a magnetic field

Option B: only an electric field

Option C: neither electric field nor magnetic field

Option D: both electric and magnetic fields

Correct Answer: only an electric field ✔

Option A: electric flux

Option B: electric intensity

Option C: electric potential

Option D: all of above are same

Correct Answer: electric intensity ✔

Option A: decrease

Option B: increase

Option C: remain constant

Option D: depends upon composition of dielectric

Correct Answer: decrease ✔

Option A: 1.6 x 10-19C

Option B: 3.2 x 10-19C

Option C: 9.1 x 109C

Option D: no definite value exist

Correct Answer: 1.6 x 10-19C ✔

Option A: glass rod acquires negative charge while silk acquires positive charge

Option B: glass rod acquires positive charge while silk acquires negative charges

Option C: both glass rod and silk acquire negative charge

Option D: both glass rod and silk acquire positive charge

Correct Answer: glass rod acquires positive charge while silk acquires negative charges ✔

Option A: Paper capacitor

Option B: Ceramic capacitor

Option C: Electrolytic capacitor

Option D: Any-of the above

Correct Answer: Electrolytic capacitor ✔

Option A: Air

Option B: Paper

Option C: Mica

Option D: Electrolytic

Correct Answer: Electrolytic ✔

Option A: zero

Option B: proportional to applied voltage

Option C: proportional to value of capacitance

Option D: both (B) and (C) above

Correct Answer: zero ✔

Option A: remain uncharged

Option B: decrease

Option C: increase

Option D: become zero

Correct Answer: decrease ✔

Option A: two insulators separated by a conductor

Option B: two conductors separated by an insulator

Option C: two insulators only

Option D: two conductors only

Correct Answer: two conductors separated by an insulator ✔

Option A: tubes

Option B: rolled foil

Option C: disc

Option D: meshed plates

Correct Answer: rolled foil ✔

Option A: 8.854 x 1(T9 F/m)

Option B: 8.854 x 1(T10 F/m)

Option C: 8.854 x KT11 F/m

Option D: 8.854 x 10″12 F/m

Correct Answer: 8.854 x 1(T10 F/m) ✔

Option A: The thinner the dielectric, the more the capacitance and the lower the voltage breakdown rating for a capacitor .

Option B: A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF

Option C: Capacitors in series provide less capacitance but a higher voltage breakdown rating for the combination

Option D: A capacitor can store charge because it has a dielectric between two conductors

Correct Answer: A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF ✔

Option A: Air capacitor

Option B: Ceramic capacitor

Option C: Paper capacitor

Option D: None of the above

Correct Answer: Ceramic capacitor ✔

Option A: zero

Option B: 1

Option C: 4

Option D: 10

Correct Answer: 1 ✔

Option A: short-circuited

Option B: open circuited

Option C: alright

Option D: leaky

Correct Answer: leaky ✔

Option A: scalar

Option B: vector

Option C: both A. and (6)

Option D: none of the above

Correct Answer: vector ✔

Option A: CV2

Option B: C2V

Option C: CV2

Option D: CV

Correct Answer: CV2 ✔

Option A: 2 joules

Option B: 4 joules

Option C: 6 joules

Option D: 8 joules

Correct Answer: 8 joules ✔

Option A: 200

Option B: 100

Option C: 3 to 8

Option D: 1 to 2

Correct Answer: 3 to 8 ✔

Option A: 50 pF

Option B: 100 pF

Option C: 150 pF

Option D: 200 pF

Correct Answer: 100 pF ✔

Option A: air capacitor

Option B: mica capacitor

Option C: electrolytic capacitor

Option D: none of the above

Correct Answer: mica capacitor ✔

Option A: 800 uC

Option B: 900 uC

Option C: 1200 uC

Option D: 1600 uC

Correct Answer: 1200 uC ✔

Option A: Ceramics

Option B: Oil

Option C: Glass

Option D: Paper

Correct Answer: Oil ✔

Option A: Paper capacitor

Option B: Mica capacitor

Option C: Ceramic disc capacitor

Option D: None of the above

Correct Answer: Mica capacitor ✔

Option A: ± 5%

Option B: ± 10%

Option C: ± 15%

Option D: ± 20%

Correct Answer: ± 10% ✔

Option A: Gauss’s law

Option B: Kirchhoff s law

Option C: Faraday’s law

Option D: Lenz’s law

Correct Answer: Gauss’s law ✔

Option A: Air

Option B: Paper

Option C: Mica

Option D: Electrolytic

Correct Answer: Electrolytic ✔

Option A: 0.1 to 0.4

Option B: 0.5 to 1.0

Option C: 2.0 to 4.0

Option D: 5 to 100

Correct Answer: 5 to 100 ✔

Option A: 36 x 10fa

Option B: 36 x 107 N

Option C: 36 x 108 N

Option D: 36 x 109 N

Correct Answer: 36 x 109 N ✔

Option A: 10 to 20 kV/mm

Option B: 30 to 50 kV/mm

Option C: 50 to 200 kV/mm

Option D: 300 to 500 kV/mm

Correct Answer: 50 to 200 kV/mm ✔

Option A: Paper

Option B: Air

Option C: Mica

Option D: Electrolytic

Correct Answer: Air ✔

Option A: uniform

Option B: non-uniform

Option C: zero

Option D: any of the above

Correct Answer: uniform ✔

Option A: Ceramic

Option B: Paper

Option C: Air

Option D: Electrolytic

Correct Answer: Ceramic ✔

Option A: reluctance

Option B: conductance

Option C: susceptance

Option D: elastance

Correct Answer: elastance ✔

Option A: Electric

Option B: Magnetic

Option C: Both (A) and (B)

Option D: None of the above

Correct Answer: Electric ✔

Option A: current

Option B: voltage

Option C: potential gradient

Option D: charge

Correct Answer: charge ✔

Option A: smaller

Option B: greater

Option C: both (A) and (B)

Option D: none of the above

Correct Answer: greater ✔

Option A: 50 joules

Option B: 150 joules

Option C: 200 joules

Option D: 250 joules

Correct Answer: 50 joules ✔

Option A: electric flux

Option B: electric flux density

Option C: magnetic flux density

Option D: electric charge density

Correct Answer: electric flux ✔

Option A: 0.56 x 1015 m/s2

Option B: 1.5 x 1015 m/s2

Option C: 1.6 x 1015 m/s2

Option D: 1.76 x 1015 m/s2

Correct Answer: 1.76 x 1015 m/s2 ✔

Option A: pholoelectric effect

Option B: chemical effect

Option C: magnetic effect

Option D: induction

Correct Answer: induction ✔

Option A: F/m

Option B: m/F

Option C: Wb/m

Option D: no units

Correct Answer: Wb/m ✔

Option A: Newton

Option B: Faraday

Option C: Michale

Option D: None of the above

Correct Answer: Faraday ✔

Option A: Faraday’s laws

Option B: Kirchhoff s laws

Option C: Coulomb’s laws

Option D: none of the above

Correct Answer: Coulomb’s laws ✔

Option A: Electric intensity

Option B: Electric flux

Option C: Magnetic flux

Option D: Magnetic flux density

Correct Answer: Electric intensity ✔

Option A: increases

Option B: decreases

Option C: remains unaltered

Option D: none of the above

Correct Answer: decreases ✔

Option A: electric flux

Option B: magnetic flux density

Option C: potential gradient

Option D: none of the above

Correct Answer: potential gradient ✔

Option A: V/m

Option B: V2/m

Option C: m/V

Option D: m/V2

Correct Answer: V/m ✔

Option A: scalar

Option B: vector

Option C: both of the above

Option D: none of the above

Correct Answer: vector ✔

Option A: Inductance

Option B: Capacitance

Option C: Potential gradient

Option D: None of the above

Correct Answer: Capacitance ✔

Option A: one joule/coulomb

Option B: one coulomb/joule

Option C: one coulomb

Option D: one joule

Correct Answer: one joule/coulomb ✔

Option A: Paraffin wax

Option B: Quartz

Option C: Glass

Option D: Air

Correct Answer: Air ✔

Option A: Farad/sq-m

Option B: Farad/meter

Option C: Weber/meter

Option D: Weber/sq-m

Correct Answer: Farad/meter ✔

Option A: earth

Option B: conduction

Option C: sheath

Option D: insulator

Correct Answer: conduction ✔

Option A: capacitance

Option B: charge

Option C: energy

Option D: none of the above

Correct Answer: capacitance ✔

Option A: 0.2 s

Option B: 0.4 s

Option C: 0.6 s

Option D: 0.8 s

Correct Answer: 0.8 s ✔

Option A: 37, initial

Option B: 62, initial

Option C: 62, final

Option D: 37, final

Correct Answer: 62, final ✔

Option A: moisture content

Option B: temperature

Option C: thickness

Option D: all of the above

Correct Answer: all of the above ✔

Option A: 1 meter/coulomb

Option B: 1 newton meter

Option C: 1 newton/meter

Option D: 1 joule/coulomb

Correct Answer: 1 newton/meter ✔