Electrostatics Archives

11. For a good 0.05 uF capacitor ohmmeter reading should

show low resistance momentarily and back off to a very high resistance

show high resistance momentarily and then a very low resistance

go quickly to 50 ohm approximately and remain there

not move at all

Detailed SolutionFor a good 0.05 uF capacitor ohmmeter reading should

12. This mention statement is associated with “The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface”.

Gauss's law

Kirchhoff's law

Faraday's law

Lenz's law

Detailed SolutionThis mention statement is associated with “The surface integral of the normal component

of the electric displacement D over any closed surface equals the charge enclosed by the surface”.

13. The time constant and R-C circuit may also be defined as the time during which the charging current falls to ______ percent of its initial maximum value,

Detailed SolutionThe time

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constant and R-C circuit may also be defined as the time during which the charging current falls to ______ percent of its initial maximum value,

14. In order to remove static electricity from machinery

construct insulated cabins

insulate the machinery

ground the framework

humidify the surroundings

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15. The dissipation factor of a good dielectric is of the order of

0.0002

0.002

0.02

0.2

Detailed SolutionThe

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dissipation factor of a good dielectric is of the order of

16. Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the

Voltage across the plates increases

Voltage across the plates decreases

Charge on the capacitor decreases

Charge on the capacitor increases

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17. The relative permittivity of free space is given by

100

1000

Detailed

Solution

18. The units of capacitance are

$$rac{{{ ext{Volt}}}}{{{ ext{Coulomb}}}}$$

$$rac{{{ ext{Coulomb}}}}{{{ ext{Volt}}}}$$

$${ ext{Ohm}}$$

$$rac{{{ ext{Henry}}}}{{{ ext{Wb}}}}$$

Detailed

Solution

19. A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?

Ceramic capacitor

Mica capacitor

Both will have identical value of capacitance

It depends on applied voltage

Detailed SolutionA mica capacitor and a ceramic

capacitor both have the same physical dimensions. Which will have more value of capacitance ?

20. Permittivity is expressed in

Farad/sq-m

Farad/meter

Weber/meter

Weber/sq-m

Detailed SolutionPermittivity is expressed

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