Which capacitor will be physically smaller for the same ratings ?
A. Ceramic capacitor
B. Paper capacitor
C. Both will be of equal size
D. None of the above
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The value of dielectric constant for vacuum is taken as
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The ohmmeter reading for a short circuited capacitor is
A. infinity
B. few kilo ohms
C. few megohms
D. zero
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For which of the following parameter variation, the capacitance of the capacitor remains unaffected ?
A. Distance between plates
B. Area of the plates
C. Nature of dielectric
D. Thickness of the plates
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The capacitor preferred for high frequency circuits is
A. air capacitor
B. mica capacitor
C. electrolytic capacitor
D. none of the above
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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
A. 62 x 105 V/m
B. 72 x 105 V/m
C. 82 x 105 V/m
D. 92 x 105 V/m
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An uncharged conductor is placed near a charged conductor, then
A. the uncharged conductor gets charged by conduction
B. the uncharged conductor gets charged by induction and then attracted towards the charging body
C. the uncharged conductor is attracted first and then charged by induction
D. it remains as such
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Which of the following expression is correct for electric field strength?
A. E = D ∈
B. E = ∈ r
C. E = π D
D. E = ∈ D
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A dielectric material must be
A. resistor
B. insulator
C. good conductor
D. semi conductor
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The property of a capacitor to store electricity is called its
A. capacitance
B. charge
C. energy
D. none of the above
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The units of capacitance are
A. Coulomb Volt
B. Volt Coulomb
C. Ohm
D. Wb Henry
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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".
A. Gauss's law
B. Kirchhoff's law
C. Faraday's law
D. Lenz's law
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Which of the following capacitors has relatively shorter shelf life ?
A. Mica capacitor
B. Electrolytic capacitor
C. Ceramic capacitor
D. Paper capacitor
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Which of the following capacitor is preferred in case of single phase motor ?
A. Mica capacitor
B. Paper capacitor
C. Electrolytic capacitor
D. Ceramic capacitor
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In the case of a lossy capacitor, its series equivalent resistance value will be
A. small
B. very small
C. large
D. zero
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The unit of dielectric strength is given by
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Dielectric constant for mica is nearly
A. 200
B. 100
C. 3 to 8
D. 1 to 2
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"The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed". The above statement is associated with
A. Coulomb’s square law
B. Gauss’s law
C. Maxwell’s first law
D. Maxwell’s second law
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“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
A. Gauss’s law
B. Kirchhoff's law
C. Faraday’s law
D. Lenz’s law
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Which is the most superior dielectric out of the following ?
A. Air
B. Glass
C. Bakelite
D. Paper
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