[amp_mcq option1=”varying voltage produces the charging and dicharging currents” option2=”of high peak value” option3=”voltage is applied to capacitive circuit, the alternating current can flow in the circuit because A. varying voltage produces the charging and dicharging currents B. of high peak value C. charging current can flow” option4=”discharge current can flow” correct=”option1″]
Electrostatics
72. . . . . . . . . at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.
[amp_mcq option1=”Electric intensity” option2=”Magnetic flux density” option3=”Electric flux” option4=”None of the above” correct=”option3″]
73. Air capacitors are generally available in the range
[amp_mcq option1=”10 to 400 pF” option2=”1 to 20 pF” option3=”100 to 900 pF” option4=”20 to 100 pF” correct=”option1″]
Detailed SolutionAir capacitors are generally available in the range
74. The absolute permittivity of free space is given by
[amp_mcq option1=”8.854 x 10-9 F/m” option2=”8.854 x 10-10 F/m” option3=”8.854 x 10-11 F/m” option4=”8.854 x 10-12 F/m” correct=”option1″]
Detailed SolutionThe absolute permittivity of free space is given by
75. One volt is the same as
[amp_mcq option1=”one joule/coulomb” option2=”one coulomb/joule” option3=”one coulomb” option4=”one joule” correct=”option1″]
76. Which of the following capacitor is preferred in case of single phase motor ?
[amp_mcq option1=”Mica capacitor” option2=”Paper capacitor” option3=”Electrolytic capacitor” option4=”Ceramic capacitor” correct=”option3″]
Detailed SolutionWhich of the following capacitor is preferred in case of single phase motor ?
77. When the dielectric is homogeneous,the potential gradient is
[amp_mcq option1=”uniform” option2=”non-uniform” option3=”zero” option4=”any of the above” correct=”option1″]
Detailed SolutionWhen the dielectric is homogeneous,the potential gradient is
78. Dielectric strength of a material depends on
[amp_mcq option1=”moisture content” option2=”temperature” option3=”thickness” option4=”all of the above” correct=”option4″]
Detailed SolutionDielectric strength of a material depends on
79. While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is
[amp_mcq option1=”Short-circuited” option2=”Open circuited” option3=”Alright” option4=”Leaky” correct=”option4″]
80. Which medium has the least dielectric strength ?
[amp_mcq option1=”Paraffin wax” option2=”Quartz” option3=”Glass” option4=”Air” correct=”option1″]
Detailed SolutionWhich medium has the least dielectric strength ?