Electrostatics

21. What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?

50 pF
100 pF
150 pF
200 pF

Detailed SolutionWhat is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?

22. The dielectric constant (relative permittivity) of glass is given by

0.1 to 0.4
0.5 to 1.0
2.0 to 4.0
5 to 100

Detailed SolutionThe dielectric constant (relative permittivity) of glass is given by

23. The electric field at a point situated at a distance d from straight charged conductor is

proportional to d
inversely proportional to d
inversely proportional to d
none of the above

Detailed SolutionThe electric field at a point situated at a distance d from straight charged conductor is

24. Which of the following capacitors will have the least variation?

Paper capacitor
Ceramic capacitor
Silver plated mica capacitor
None of the above

Detailed SolutionWhich of the following capacitors will have the least variation?

25. In a capacitive circuit

a steady value of applied voltage causes discharge
an increase in applied voltage makes a capacitor charge
decrease in applied voltage makes a capacitor charge
none of the above

Detailed SolutionIn a capacitive circuit

26. In the case of a lossy capacitor, its series equivalent resistance value will be

small
very small
large
zero

Detailed SolutionIn the case of a lossy capacitor, its series equivalent resistance value will be

27. A capacitor consists of

two insulators separated by a conductor
two conductors separated by an insulator
two insulators only
two conductors only

Detailed SolutionA capacitor consists of

28. Dielectric strength of medium

increases with rise in temperature
increases with moisture content
is same for all insulating materials
none of the above

Detailed SolutionDielectric strength of medium

29. Electric intensity at any point in an electric field is equal to the at that point.

electric flux
magnetic flux density
potential gradient
none of the above

Detailed SolutionElectric intensity at any point in an electric field is equal to the at that point.

30. is that property of a capacitor which delays any change of voltage across it.

Inductance
Capacitance
Potential gradient
None of the above

Detailed Solutionis that property of a capacitor which delays any change of voltage across it.

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