QUIZ CAPACITANCE

1. Which of the following is the S.I unit of capacitance?A. Henry (H)B. Ohm (Ω)C. Newton (N)D. Farad (F)

2. The charged 300C stored on 89F capacitor. What is the voltage across the capacitor?A. 0.29 VB. 3.37 VC. 11.30 VD. 36.70 V

3. What is the charge on 20µF parallel plate capacitor if the potential across it is 45 V.A. 900 CB. 900 mCC. 900 µCD. 900 nC

4. Calculate the capacitance of a parallel plate capacitor if 12e of charge is on each plate when the potential different is 3V. (Given e = 1.602x10-19)A. 6.4x10-19CB. 3.6x10-19CC. 7.2x10-19CD. 8.3x10-19C

5. Calculate the capacitance of parallel plate capacitor which is area of each plate is (3mx4m) and separated by 3mm air gap.A. 35.4x10-6 FB. 35.4x10-9 FC. 35.4x10-12 FD. 35.4x10-15 F

6. The parallel plate capacitor with area 0.03m2 and separated by 5mm air gap. What is the capacitance?A. 12.1x10-12FB. 19.3x10-12FC. 31.8x10-12FD. 53.1x10-12F

7. A 12µF circular capacitance with radius 2.5m separated by Y m air gap. Determine the value of Y.A. 12.47cmB. 13.47mmC. 14.47µmD. 15.47nm

8. All the following is NOT equal to the dielectric constant EXCEPTA. C0

CB. ε0

εC. V

V 0D. E

E0

9. A capacitor has plate 20 x 50m which have a separation of 5m. if the gap between the plates filled dielectric with a relative permittivity is 150. Calculate the capacitance of the device.A. 2.65 cmB. 26.5 mmC. 265 µmD. 265 nm

10..

A 20nF capacitor has a plate separation of 2mm of dielectric. If the area of each plate is 3m2. What is relative permittivity of dielectric, k?A. 1.51B. 2.46C. 3.37D. 4.89

11..

All the following is increase the capacitance of capacitor by increasing the factor below EXCEPTA. plate areaB. plate separationC. permittivityD. dielectric constant

12..

Which of the following arrangement give the value of equivalent capacitance is 2µF?A. Two 2µF capacitors connected in

parallel.B. Two 4 µF capacitors connected in

series.C. Two 2 µF capacitors connected in

series.D. Three 1 µF capacitors connected in

parallel.

13..

Seven 5.3 µF capacitors are connected in parallel. What is the equivalent capacitance?A. 1.32 µFB. 3.71 µFC. 37.1 µFD. 13.2 µF

14..

Ten capacitors are connected in series, each of capacitance is 10 µF. What is the equivalent capacitance?A. 1 µFB. 10 µFC. 0.1 µFD. 100 µF

15..

Two capacitors each 20 µF are connected in series. Both then connected in parallel to a 30 µF capacitor. Find the equivalent capacitance.A. 17 µFB. 30 µFC. 40 µFD. 90 µF

16.

Calculate the magnitude of the charges on the 3µF capacitor.A. 205.7 µCB. 307.5 µC

C. 411.4 µCD. 564.6 µC

17..

The conducting plate of capacitors has a separation of 30 m. If the potential across the capacitor is 100 V. What is the electric field strength in the dielectric?A. 3.33V/mB. 33.33V/mC. 333.33V/mD. 3333.33V/m

18. A capacitor with capacitance 33 µF is connected to the 120V. What is the electric field strength if the separation distance between two plates is 15m?A. 3960 V/mB. 495 V/mC. 8 V/mD. 0.125 V/m

19. Calculate the energy stored in 11 µF capacitor when it is charge to 120 V.A. 79.2mJB. 66.0mJC. 80.5mJD. 92.3mJ

20. A 150 µF capacitor has a potential different between the plates of 400V. How much electric energy can be stored?A. 3 JB. 6 JC. 8 JD. 12 J