Electrostatics Archives

11. The force between two charges is 120 N. If the distance between the charges is doubled, the force will be

60 N

30 N

40 N

15 N

Detailed SolutionThe force between two charges is 120 N. If the distance between the charges is doubled, the force will be

12. Which of the following materials has the highest value of dielectric constant?

Glass

Vacuum

Ceramics

Oil

Detailed SolutionWhich of the following materials has the highest value of dielectric constant?

13. Dielectric strength ______ with increasing thickness

increases

decreases

remains unaltered

none of the above

Detailed SolutionDielectric strength ______ with increasing thickness

14. The capacitance between two plates increases with

shorter plate area and higher applied voltage

shorter plate area and shorter distance between them

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

larger plate area and shorter distance between plates

Detailed SolutionThe capacitance between two plates increases with

15. A condenser suitable for D.C. only is

Metallic plate variable gang condenser

Metallic paper capacitor

only is A. Metallic plate variable gang condenser B. Metallic paper capacitor C. Oil impregnated paper condenser

Poled aluminium electrolytic condenser

Detailed SolutionA condenser suitable for D.C. only is

16. The unit of dielectric strength is given by

V/m

V2/m

m/V

m/V2

Detailed SolutionThe unit of dielectric strength is given by

17. A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?

Paper capacitor

Ceramic capacitor

Electrolytic capacitor

Any-of the above

Detailed SolutionA capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?

18. For closer tolerances which of the following capacitors is usually preferred ?

Paper capacitor

Mica capacitor

Ceramic disc capacitor

None of the above

Detailed SolutionFor closer tolerances which of the following capacitors is usually preferred ?

19. The presence of an uncharged conductor near a charged one increases the

charge of the charged conductor

capacity of the charged conductor

potential of the charged conductor

all of the above

Detailed SolutionThe presence of an uncharged conductor near a charged one increases the

20. When a dielectric is placed in an electric field the field strength

decreases

increases

reduces to zero

remain unchanged

Detailed SolutionWhen a dielectric is placed in an electric field the field strength

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