Q. A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is 62 x 105 V/m72 x 105 V/m82 x 105 V/m92 x 105 V/m Answer: 72 x 105 V/m
READ MORE +Electrostatics MCQs
Q. Dielectric strength of mica is 10 to 20 kV/mm30 to 50 kV/mm50 to 200 kV/mm300 to 500 kV/mm Answer: 50 to 200 kV/mm
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Q. ________field is associated with the capacitor. ElectricMagneticBoth A. and B.None of the above Answer: Electric
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Q. The unit of electric instensity is N/C2Wb/m2N/CN2/C Answer: N/C
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Q. The potential gradient across the material of low permittivity is than across the material of high permittivity. smallergreaterboth A. and B.none of the above Answer: greater
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Q. When the dielectric is homogeneous, the potential gradient is uniformnon-uniformzeroany of the above Answer: uniform
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Q. The inverse of capacitance is called reluctanceconductancesusceptanceelastance Answer: elastance
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Q. The dielectric constant (relative permittivity) of glass is given by 0.1 to 0.40.5 to 1.02.0 to 4.05 to 100 Answer: 5 to 100
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Q. When a dielectric is placed in an electric field the field strength decreasesincreasesreduces to zeroremain unchanged Answer: decreases
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Q. capacitors are mainly used for radio frequency tuning. PaperAirMicaElectrolytic Answer: Air
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Q. “The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface”. The above statement is associated with Gauss’s lawKirchhoff s lawFaraday’s lawLenz’s law Answer: Gauss’s law
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Q. The units of volume charge density are Coulomb/meterCoulomb/meterCoulomb/meterCoulomb/meter Answer: Coulomb/meter
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