16. The capacitance of a capacitor is not affected by
A. distance between plates
B. area of plates
C. thickness of plates
D. all of the above
C. thickness of plates
17. Which of the following is not a vector ?
A. Linear momentum
B. Angular momentum
C. Electric field
D. Electric potential
B. Angular momentum
18. 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
B. voltage across the plates decreases
19. If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because
A. varying voltage produces the charging and discharging currents
B. of high peak value
C. charging current can flow
D. discharge current can flow
A. varying voltage produces the charging and discharging currents
20. Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ?
A. 50
B. 100
C. 150
D. 200
B. 100
21. Which of the following statements is correct ?
A. Air capacitors have a blackbird to indicate the outside foil
B. Electrolytic capacitor must be connected in the correct polarity
C. Ceramic capacitors must be connected in the correct polarity
D. Mica capacitors are available in capacitance value of 1 to 10 pF
B. Electrolytic capacitor must be connected in the correct polarity
22. The dissipation factor of a good dielectric is of the order of
A. 0.0002
B. 0.002
C. 0.02
D. 0.2
A. 0.0002
23. “The total electric flux through any closed surface surrounding charges is
equal to the amount overcharge 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
24. 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
C. two in parallel and third in series with this combination
25. In a capacitor the electric charge is stored in
A. metal plates
B. dielectric
C. both (a) and (6)
D. none of the above
B. dielectric
26. 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
D. Thickness of the plates
27. Which of the following statement is true ?
A. The current in the discharging capacitor grows linearly
B. The current in the discharging capacitor grows exponentially
C. The current in the discharging capacitor decays exponentially
D. The current in the discharging capacitor decreases constantly
B. The current in the discharging capacitor grows exponentially
28. 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
A. E = D/E
29. Which of the following materials has the highest value of dielectric constant?
A. Glass
B. Vacuum
C. Ceramics
D. Oil
C. Ceramics
