150 Important Electrostatics and Capacitance MCQ Question and Answer | PDF Free Download
1.A gang condenser is a
- Apolarised capacitor
- BVariable capacitor
- CCeramic capacitor
- DNone of the above
2.A paper capacitor is usually available in the form of
- ATubes
- BRolled foil
- CDisc
- DMeshed plates
3.Air capacitor is generally available in the range
- A10 to 400 Pf
- B1 to 20 Pf
- C100 to 900 Pf
- D20 to 100 Pf
4.A capacitor charged 200 V has 2000 ?C of charge. The value of capacitance will be
- A10 F
- B10 ?F
- C100 ?F
- D1000 ?F
5.A capacitor in a circuit become hot and ultimately exploded due to wrong connections, which type of capacitor it could be?
- APaper capacitor
- BCeramic capacitor
- CElectrolytic capacitor
- DAny of the above
6.The ratio of electric flux density to electric field intensity is called _________of the medium.
- APermeability
- BPermittivity
- CReluctance
- DCapacitance
7.The relative permittivity of a free space is given by
- A1
- B10
- C1000
- D100
8.Electric field intensity is a _______ quantity.
- A Scalar
- BVector
- CBoth (a) and (b)
- DNone of the above
9.When 4 volts e.m.f is applied across 1 farad capacitor , it will store energy of
- A2 joules
- B4 joules
- C6 joules
- D8 joules
10.With steady D.C voltage from a battery applied to a capacitance, after it charges to the battery voltage, the current in the circuit
- AIs smaller for the larger values of capacitance
- BIs greater for larger values of the capacitance
- CIs zero for any capacitance value
- DDepends on the current rating of the battery
11.The capacitor preferred for high frequency circuits is
- AAir capacitor
- BMica capacitor
- CElectrolytic capacitor
- DNone of the above
12.The capacity of a capacitor bank used in power factor correction is expressed in terms of
- AKW
- BKVA
- Cvolts
- DKVAR
13.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
- Ashort-circuited
- Bopen-circuited
- Calright
- Dleaky
14.If a 6 ?F capacitor is charged to 200V, the charge in coulombs will be
- A 800?C
- B900?C
- C1200?C
- D1600?C
15.Which capacitor will be physically smaller for the same rating?
- ACeramic capacitor
- BPaper capacitor
- CBoth will be equal size
- DNone of the above
16.What is the value of capacitance that must be connected in parallel with 50 pf condenser to make an equivalent capacitance of 150 pF?
- A50 pF
- B100 pF
- C150 pF
- D200 pF
17.A mica capacitor and ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance?
- ACeramic capacitor
- BMica capacitor
- CBoth will have identical value of capacitance
- DIt depends on applied voltage
18.Which of the following capacitors will have the least value of breakdown voltage ?
- AMica
- BPaper
- CCeramic
- DElectrolytic
19.The breakdown voltage of paper capacitors is usually
- A20 to 60 volts
- B200 to 1600 volts
- C2000 to 3000 volts
- DMore than 10000 volts
20.Dielectric constant for mica is nearly
- A200
- B100
- C3 to 8
- D1 to 2