Electrostatics MCQs

Option A: Wien’s bridge

Option B: Wheatstone bridge

Option C: Schering bridge

Option D: Hay’s bridge

Correct Answer: Schering bridge ✔

Option A: shorter plate area and higher applied voltage

Option B: shorter plate area and shorter distance between them

Option C: larger plate area, longer distance between plates and higher,applied voltage

Option D: larger plate area and shorter distance between plates

Correct Answer: larger plate area and shorter distance between plates ✔

Option A: charged

Option B: short-circuited

Option C: lossy

Option D: satisfactory

Correct Answer: short-circuited ✔

Option A: CIR

Option B: 1/RC

Option C: RC

Option D: RIC

Correct Answer: RC ✔

Option A: stable operation

Option B: accurate value

Option C: low leakage reactance

Option D: low losses

Correct Answer: low leakage reactance ✔

Option A: the uncharged conductor gets charged by conduction

Option B: the uncharged conductor gets charged by induction and then attracted towards the charging body

Option C: the uncharged conductor is attracted first and then charged by induction

Option D: it remains as such

Correct Answer: the uncharged conductor gets charged by induction and then attracted towards the charging body ✔

Option A: always polarised

Option B: usually of fixed value

Option C: electrolytic condenser

Option D: a variable condenser

Correct Answer: usually of fixed value ✔

Option A: Aluminium foil capacitor

Option B: Mica capacitor

Option C: Ceramic capacitor

Option D: Paper capacitor

Correct Answer: Ceramic capacitor ✔

Option A: charge of the charged conductor

Option B: capacity of the charged conductor

Option C: potential of the charged conductor

Option D: all of the above

Correct Answer: capacity of the charged conductor ✔

Option A: Mica capacitors are available in capacitance values of 5 to 20 uF

Option B: Air capapitors have a black band to indicate the outside foil

Option C: Electrolytic capacitors must be connected in correct polarity

Option D: Ceramic capacitors must be connected in correct polarity

Correct Answer: Electrolytic capacitors must be connected in correct polarity ✔

Option A: show low resistance momentarily and back off to a very high resistance

Option B: show high resistance momentarily and then a very low resistance

Option C: go quickly to 50 ohm approximately and remain there

Option D: not move at all

Correct Answer: show low resistance momentarily and back off to a very high resistance ✔

Option A: infinity

Option B: few kilo ohms

Option C: few megohms

Option D: zero

Correct Answer: zero ✔

Option A: low capacitance

Option B: fixed capacitance

Option C: variable capacitance

Option D: large value of capacitance

Correct Answer: large value of capacitance ✔

Option A: 5 times smaller than before

Option B: 5 times greater than before

Option C: 10 times greater than before

Option D: 25 times larger than before

Correct Answer: 25 times larger than before ✔

Option A: metallic plate variable gang condenser

Option B: metallic paper capacitor

Option C: oil impregrated paper condenser

Option D: poled aluminium electrolytic condenser

Correct Answer: poled aluminium electrolytic condenser ✔

Option A: Mica capacitor

Option B: Paper capacitor

Option C: Electrolytic capacitor

Option D: Ceramic capacitor

Correct Answer: Electrolytic capacitor ✔

Option A: decreases

Option B: increases

Option C: reduces to zero

Option D: remain unchanged

Correct Answer: decreases ✔

Option A: milli-coulomb

Option B: micro-coulomb

Option C: pico-coulomb

Option D: coulomb

Correct Answer: micro-coulomb ✔

Option A: move out of the field of influence of the two charges

Option B: remain in stable equilibrium

Option C: not be in equilibrium

Option D: be in unstable equilibrium

Correct Answer: remain in stable equilibrium ✔

Option A: Air capacitor

Option B: Electrolytic capacitor

Option C: Mica capacitor

Option D: none of the above

Correct Answer: Mica capacitor ✔

Option A: construct insulated cabins

Option B: insulate the machinery

Option C: ground the framework

Option D: humidify the surroundings

Correct Answer: ground the framework ✔

Option A: an electric field

Option B: a magnetic field

Option C: both A. and (6)

Option D: none of the above

Correct Answer: an electric field ✔

Option A: J/mm

Option B: C/m2

Option C: kV/mm

Option D: N/mm

Correct Answer: kV/mm ✔

Option A: Air

Option B: Glass

Option C: Bakelite

Option D: Paper

Correct Answer: Bakelite ✔

Option A: surface is moistened

Option B: conductive dressing is done

Option C: oil compound dressing is done

Option D: talcum powder is sprayed on the surface

Correct Answer: conductive dressing is done ✔

Option A: Current

Option B: Voltage

Option C: impedance

Option D: None of the above

Correct Answer: Voltage ✔

Option A: metal plates

Option B: dielectric

Option C: dielectric as well as metal plates

Option D: none of the above

Correct Answer: dielectric ✔

Option A: insulation

Option B: conductor

Option C: outer sheath

Option D: uniformly all over

Correct Answer: insulation ✔

Option A: increases with rise in temperature

Option B: increases with moisture content

Option C: is same for all insulating materials

Option D: none of the above

Correct Answer: none of the above ✔

Option A: 100 kV/m

Option B: 10 kV/m

Option C: 5 kV/m

Option D: 2 kV/m

Correct Answer: 100 kV/m ✔

Option A: It will become magnetic

Option B: It will melt

Option C: It will get punctured or cracked

Option D: Its molecular structure will get changed

Correct Answer: It will get punctured or cracked ✔

Option A: ceramic plates and one mica disc

Option B: insulators separated by a dielectric

Option C: silver-coated insulators

Option D: conductors separated by an insulator

Correct Answer: conductors separated by an insulator ✔

Option A: 37

Option B: 42

Option C: 63

Option D: 73

Correct Answer: 37 ✔

Option A: Electric intensity

Option B: Magnetic flux density

Option C: Electric flux

Option D: None of the above

Correct Answer: Electric intensity ✔

Option A: 62 x 105 V/m

Option B: 72 x 105 V/m

Option C: 82 x 105 V/m

Option D: 92 x 105 V/m

Correct Answer: 72 x 105 V/m ✔

Option A: Air

Option B: Mica

Option C: Plastic film

Option D: Ceramic

Correct Answer: Mica ✔

Option A: Coulomb/meter

Option B: Coulomb/meter

Option C: Coulomb/meter

Option D: Coulomb/meter

Correct Answer: Coulomb/meter ✔

Option A: Mica

Option B: Paper

Option C: Ceramic

Option D: Electrolytic

Correct Answer: Electrolytic ✔

Option A: Ceramic capacitor

Option B: Paper capacitor

Option C: Both will be of equal size

Option D: None of the above

Correct Answer: Ceramic capacitor ✔

Option A: Ceramic capacitor

Option B: Mica capacitor

Option C: Both will have identical value of capacitance

Option D: It depends on applied voltage

Correct Answer: Ceramic capacitor ✔

Option A: kW

Option B: kVA

Option C: kVAR

Option D: volts

Correct Answer: kVA ✔

Option A: 1

Option B: 10

Option C: 100

Option D: 1000

Correct Answer: 1 ✔

Option A: polarised capacitor

Option B: variable capacitor

Option C: ceramic capacitor

Option D: none of the above

Correct Answer: variable capacitor ✔

Option A: henry

Option B: ohm

Option C: farad

Option D: farad/m

Correct Answer: farad ✔

Option A: 10 to 400 pF

Option B: 1 to 20 pF

Option C: 100 to 900 pF

Option D: 20 to 100 pF

Correct Answer: 10 to 400 pF ✔

Option A: 10 F

Option B: 10 uF

Option C: 100 nF

Option D: 1000 uF

Correct Answer: 10 uF ✔

Option A: increase in plate area and decrease in distance between the plates

Option B: increase in plate area and distance between the plates

Option C: decrease in plate area and value of applied voltage

Option D: reduction in plate area and distance between the plates

Correct Answer: increase in plate area and decrease in distance between the plates ✔

Option A: a steady value of applied voltage causes discharge

Option B: an increase in applied voltage makes a capacitor charge

Option C: decrease in applied voltage makes a capacitor charge

Option D: none of the above

Correct Answer: an increase in applied voltage makes a capacitor charge ✔

Option A: 0.0002

Option B: 0.002

Option C: 0.02

Option D: 0.2

Correct Answer: 0.0002 ✔

Option A: all in series

Option B: all in parallel

Option C: two in parallel and third in series with this combination

Option D: two in series and third in parallel across this combination

Correct Answer: two in parallel and third in series with this combination ✔

Option A: capacitor in parallel with contacts

Option B: capacitor in series with each contact

Option C: resistance in line

Option D: none of the above

Correct Answer: capacitor in parallel with contacts ✔

Option A: The leakage resistance of ceramic capacitors is generally high

Option B: The stored energy in a capacitor decreases with reduction in value of capacitance

Option C: The stored energy in a capacitor increases with applied voltage

Option D: A wire cable has distributed capacitance between the conductors

Correct Answer: The stored energy in a capacitor decreases with reduction in value of capacitance ✔

Option A: small

Option B: very small

Option C: large

Option D: zero

Correct Answer: large ✔

Option A: Mica capacitor

Option B: Electrolytic capacitor

Option C: Ceramic capacitor

Option D: Paper capacitor

Correct Answer: Electrolytic capacitor ✔

Option A: E = D/E

Option B: E = D2/t

Option C: E = jtD

Option D: E= nD2

Correct Answer: E = D/E ✔

Option A: The current in the discharging capacitor grows linearly

Option B: The current in the dicharging capacitor grows exponentially

Option C: The current in the discharging capacitor decays exponentially

Option D: The current in the discharging capacitor decreases constantly

Correct Answer: The current in the dicharging capacitor grows exponentially ✔

Option A: Glass

Option B: Vacuum

Option C: Ceramics

Option D: Oil

Correct Answer: Oil ✔

Option A: Distance between plates

Option B: Area of the plates

Option C: Nature of dielectric

Option D: Thickness of the plates

Correct Answer: Thickness of the plates ✔

Option A: Paper capacitor

Option B: Ceramic capacitor

Option C: Silver plated mica capacitor

Option D: None of the above

Correct Answer: Silver plated mica capacitor ✔

Option A: metal plates

Option B: dielectric

Option C: both (A) and (B)

Option D: none of the above

Correct Answer: dielectric ✔

Option A: Coulomb’s square law

Option B: Gauss’s law

Option C: Maxwell’s first law

Option D: Maxwell’s second law

Correct Answer: Gauss’s law ✔

Option A: Voltage across the plates increases

Option B: voltage across the plates decreases

Option C: charge on the capacitor decreases

Option D: charge on the capacitor increases

Correct Answer: voltage across the plates decreases ✔

Option A: 50

Option B: 100

Option C: 150

Option D: 200

Correct Answer: 100 ✔

Option A: Air capacitors have a black band to indicate the outside foil

Option B: Electrolytic capacitor must be connected in the correct polarity

Option C: Ceramic capacitors must be connected in the correct polarity

Option D: Mica capacitors are available in capacitance value of 1 to 10 pF

Correct Answer: Electrolytic capacitor must be connected in the correct polarity ✔

Option A: varying voltage produces the charging and dicharging currents

Option B: of high peak value

Option C: charging current can flow

Option D: discharge current can flow

Correct Answer: varying voltage produces the charging and dicharging currents ✔

Option A: resistor

Option B: insulator

Option C: good conductor

Option D: semi conductor

Correct Answer: insulator ✔

Option A: distance between plates

Option B: area of plates

Option C: thickness of plates

Option D: all of the above

Correct Answer: thickness of plates ✔

Option A: volts/coulomb

Option B: coulombs/volt

Option C: ohms

Option D: henry/Wb

Correct Answer: coulombs/volt ✔

Option A: 20 uF

Option B: 30 uE

Option C: 40 uF

Option D: 50 uF

Correct Answer: 30 uE ✔

A. D.C. only
B. AC. only
C. both D.C. as well as A.C.

Correct Answer: A. D.C. only ✔

Option A: Linear momentum

Option B: Angular momentum

Option C: Electric field

Option D: Electric potential

Correct Answer: Angular momentum ✔

Option A: always straight

Option B: always curved

Option C: sometimes curved

Option D: none of the above

Correct Answer: always curved ✔

Option A: decrease

Option B: increase

Option C: remains unchanged

Option D: become zero

Correct Answer: increase ✔

Option A: 0.024 F

Option B: 0.12 F

Option C: 0.6 F

Option D: 0.8 F

Correct Answer: 0.024 F ✔

Option A: 5 uF

Option B: 30 uF

Option C: 45 uF

Option D: 50 uF

Correct Answer: 5 uF ✔

Option A: 0.024 F

Option B: 0.12 F

Option C: 0.6 F

Option D: 0.8 F

Correct Answer: 0.024 F ✔

Option A: away from the charge

Option B: towards the charge

Option C: both A. and (6)

Option D: none of the above

Correct Answer: away from the charge ✔

Option A: 400 N/C

Option B: 600 N/C

Option C: 800 N/C

Option D: 1200 N/C

Correct Answer: 800 N/C ✔

Option A: proportional to d

Option B: inversely proportional to d

Option C: inversely proportional to d

Option D: none of the above

Correct Answer: proportional to d ✔

Option A: always parallel

Option B: always at 90°

Option C: inclined at any angle 0

Option D: none of the above

Correct Answer: always at 90° ✔

Option A: 60 N

Option B: 30 N

Option C: 40 N

Option D: 15 N

Correct Answer: 30 N ✔

Option A: electrons

Option B: protons

Option C: neutrons

Option D: electric field

Correct Answer: electric field ✔

Option A: low permittivity

Option B: high permittivity

Option C: permittivity same as that of air

Option D: permittivity slightly more than that of air

Correct Answer: high permittivity ✔