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1) A gang condenser is a____________? a. polarised capacitor b. variable capacitor c. ceramic capacitor d. none of the above
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2) The unit of capacitance is__________? a. henry b. ohm c. farad d. farad/m
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3) Air capacitors are generally available in the range_________? a. 10 to 400 pF b. 1 to 20 pF c. 100 to 900 pF d. 20 to 100 pF
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4) A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be_____________? a. 10 F b. 10 uF c. 100 nF d. 1000 uF
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5) Capacitance increases with_____________? a. increase in plate area and decrease in distance between the plates b. increase in plate area and distance between the plates c. decrease in plate area and value of applied voltage d. reduction in plate area and distance between the plates
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6) In a capacitive circuit___________? a. a steady value of applied voltage causes discharge b. an increase in applied voltage makes a capacitor charge c. decrease in applied voltage makes a capacitor charge d. none of the above
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7) The dissipation factor of a good dielectric is of the order of____________? a. 0.0002 b. 0.002 c. 0.02 d. 0.2
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8) Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them_____________? a. all in series b. all in parallel c. two in parallel and third in series with this combination d. two in series and third in parallel across this combination
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9) The sparking between two electrical contacts can be reduced by inserting a___________? a. capacitor in parallel with contacts b. capacitor in series with each contact c. resistance in line d. none of the above
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10) Which of the following statements is incorrect _________________? a. The leakage resistance of ceramic capacitors is generally high b. The stored energy in a capacitor decreases with reduction in value of capacitance c. The stored energy in a capacitor increases with applied voltage d. A wire cable has distributed capacitance between the conductors
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11) 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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12) 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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13) Which of the following expression is correct for electric field strength___________? a. E = D/E b. E = D2/t c. E = jtD d. E= nD2
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14) Which of the following statement is true __________? a. The current in the discharging capacitor grows linearly b. The current in the dicharging capacitor grows exponentially c. The current in the discharging capacitor decays exponentially d. The current in the discharging capacitor decreases constantly
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15) Which of the following materials has the highest value of dielectric constant___________? a. Glass b. Vacuum c. Ceramics d. Oil
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16) 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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17) Which of the following capacitors will have the least variation ____________? a. Paper capacitor b. Ceramic capacitor c. Silver plated mica capacitor d. None of the above
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18) In a capacitor the electric charge is stored in____________? a. metal plates b. dielectric c. both (A) and (B) d. none of the above
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19) “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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20) 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____________? a. Voltage across the plates increases b. voltage across the plates decreases c. charge on the capacitor decreases d. charge on the capacitor increases
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