Electrostatics

[amp_mcq option1=”show low resistance momentarily and back off to a very high resistance” option2=”show high resistance momentarily and then a very low resistance” option3=”go quickly to 50 ohm approximately and remain there” option4=”not move at all” correct=”option1″]

Detailed SolutionFor a good 0.05 uF capacitor ohmmeter reading should

[amp_mcq option1=”Gauss’s law” option2=”Kirchhoff’s law” option3=”Faraday’s law” option4=”Lenz’s law” correct=”option1″]

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”.

[amp_mcq option1=”37″ option2=”42″ option3=”63″ option4=”73″ correct=”option3″]

Detailed SolutionThe 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,

[amp_mcq option1=”construct insulated cabins” option2=”insulate the machinery” option3=”ground the framework” option4=”humidify the surroundings” correct=”option3″]

Detailed SolutionIn order to remove static electricity from machinery

[amp_mcq option1=”0.0002″ option2=”0.002″ option3=”0.02″ option4=”0.2″ correct=”option1″]

Detailed SolutionThe dissipation factor of a good dielectric is of the order of

[amp_mcq option1=”Voltage across the plates increases” option2=”Voltage across the plates decreases” option3=”Charge on the capacitor decreases” option4=”Charge on the capacitor increases” correct=”option3″]

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

[amp_mcq option1=”1″ option2=”10″ option3=”100″ option4=”1000″ correct=”option1″]

Detailed SolutionThe relative permittivity of free space is given by

[amp_mcq option1=”$$\frac{{{\text{Volt}}}}{{{\text{Coulomb}}}}$$” option2=”$$\frac{{{\text{Coulomb}}}}{{{\text{Volt}}}}$$” option3=”$${\text{Ohm}}$$” option4=”$$\frac{{{\text{Henry}}}}{{{\text{Wb}}}}$$” correct=”option2″]

Detailed SolutionThe units of capacitance are

[amp_mcq option1=”Ceramic capacitor” option2=”Mica capacitor” option3=”Both will have identical value of capacitance” option4=”It depends on applied voltage” correct=”option1″]

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

[amp_mcq option1=”Farad/sq-m” option2=”Farad/meter” option3=”Weber/meter” option4=”Weber/sq-m” correct=”option1″]

Detailed SolutionPermittivity is expressed in