[amp_mcq option1=”60 N” option2=”30 N” option3=”40 N” option4=”15 N” correct=”option4″]
Electrostatics
12. Which of the following materials has the highest value of dielectric constant?
[amp_mcq option1=”Glass” option2=”Vacuum” option3=”Ceramics” option4=”Oil” correct=”option3″]
Detailed SolutionWhich of the following materials has the highest value of dielectric constant?
13. Dielectric strength ______ with increasing thickness
[amp_mcq option1=”increases” option2=”decreases” option3=”remains unaltered” option4=”none of the above” correct=”option1″]
Detailed SolutionDielectric strength ______ with increasing thickness
14. The capacitance between two plates increases with
[amp_mcq option1=”shorter plate area and higher applied voltage” option2=”shorter plate area and shorter distance between them” option3=”larger plate area, longer distance between plates and higher,applied voltage” option4=”larger plate area and shorter distance between plates” correct=”option4″]
Detailed SolutionThe capacitance between two plates increases with
15. A condenser suitable for D.C. only is
[amp_mcq option1=”Metallic plate variable gang condenser” option2=”Metallic paper capacitor” option3=”only is A. Metallic plate variable gang condenser B. Metallic paper capacitor C. Oil impregnated paper condenser” option4=”Poled aluminium electrolytic condenser” correct=”option1″]
16. The unit of dielectric strength is given by
[amp_mcq option1=”V/m” option2=”V2/m” option3=”m/V” option4=”m/V2″ correct=”option1″]
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 ?
[amp_mcq option1=”Paper capacitor” option2=”Ceramic capacitor” option3=”Electrolytic capacitor” option4=”Any-of the above” correct=”option3″]
18. For closer tolerances which of the following capacitors is usually preferred ?
[amp_mcq option1=”Paper capacitor” option2=”Mica capacitor” option3=”Ceramic disc capacitor” option4=”None of the above” correct=”option3″]
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
[amp_mcq option1=”charge of the charged conductor” option2=”capacity of the charged conductor” option3=”potential of the charged conductor” option4=”all of the above” correct=”option2″]
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
[amp_mcq option1=”decreases” option2=”increases” option3=”reduces to zero” option4=”remain unchanged” correct=”option1″]
Detailed SolutionWhen a dielectric is placed in an electric field the field strength