Pf exam: 086003rr capacitors and inductors

Exam: 086003RR – Capacitors and Inductors

 

1. What is the time constant of a 0.01 microfarad capacitor and a 600 ohm resistor connected in series?

A. 60 µS

B. 60 mS

C. 6 µS

D. 6 mS

 

2. What is the total inductance of a circuit that contains two 10 µH inductors connected in parallel?

A. 8 µH

B. 15 µH

C. 20 µH

D. 5 µH

 

3. A circuit contains a 2 microfarads and 6 microfarads capacitor connected in series. What is the total

capacitance of this circuit?

A. 3.6 microfarads

B. 16 microfarads

C. 1.5 microfarads

D. 8 microfarads

 

4. A 15 H and a 20 H inductor are connected in parallel. What is the total inductance of this circuit?

A. 2.46 H

B. 8.57 H

C. 35 H

D. 22.6 H

 

5. A circuit contains a 2 microfarads and a 20 microfarads capacitor connected in parallel. What is the total

capacitance of the circuit?

A. 18 microfarads

B. 1.8 microfarads

C. 22 microfarads

D. 9.6 microfarads

 

6. What action should always be taken before working on a circuit with an electrolytic capacitor or another

large capacitor?

A. Check the capacitor with an LCR meter.

B. Place the VOM’s leads directly to the capacitor.

C. Discharge the capacitor.

D. Disconnect the bleeder resistor.

 

7. A circuit contains a 10 pF capacitor and a 50 pF capacitor connected in parallel. What is the total

capacitance of this circuit?

A. 8.3 pF

B. 50 pF

C. 25 pF

D. 60 pF

 

8. On an electrolytic or paper capacitor, what does the black band indicate?

A. That the capacitor’s negative lead is near the band

B. That the capacitor’s voltage rating is less than 100 VDC

C. That the capacitor has a value less than 10 mF

D. That the capacitor is color coded to military specifications

 

9. Which of the following capacitor types has the lowest insulation resistance and therefore, the highest

leakage current?

A. Ceramic

B. Electrolytic

C. Mica

D. Tantalum

 

10. What type of capacitor has great stability and is up to three times smaller than a standard electrolytic

capacitor?

A. Paper

B. Tantalum

C. Ceramic

D. Mica

 

11. An inductor stores a charge

A. as a magnetic field in its dielectric.

B. in an insulating material in the circuit.

C. as a magnetic field surrounding the conductor.

D. in the electric field between its plates.

 

12. An electronic circuit has a 60 mH inductor and a 30 mH inductor connected in parallel. What is the

total inductance of the circuit?

A. 20 mH

B. 75 mH

C. 35 mH

D. 90 mH

 

13. What is the dielectric constant of ceramic?

A. 1,200

B. 900

C. 80

D. 7,500

 

14. A circuit contains a 20 microfarads capacitor and a 60 microfarads capacitor connected in parallel.

What is the total capacitance of the circuit?

A. 40 microfarads

B. 80 microfarads

C. 58 microfarads

D. 15 microfarads

 

15. What is the time constant of a 5 mH inductor and a 1,000 ohm resistor connected in series?

A. 50 mS

B. 5 mS

C. 5 µS

D. 50 µS

 

16. An RC circuit contains a 2,000 ohm resistor and a 0.5 microfarad capacitor connected in series. What

is the time constant of this circuit?

A. 100 µS

B. 10 mS

C. 1 mS

D. 10 µS

 

17. What is the time constant of a 10 H inductor and a 200 ohm resistor connected in series?

A. 5 mS

B. 50 mS

C. 5 µS

D. 50 µS

 

18. What is the total inductance of a circuit that contains two 22 mH inductors in parallel?

A. 5.5 mH

B. 11 mH

C. 22 mH

D. 44 mH

 

19. What type of capacitor uses aluminum oxide as its dielectric?

A. Paper

B. Ceramic

C. Mica

D. Electrolytic

 

20. An electronic circuit contains a 20 mh and a 60 mh inductor connected in parallel. What is the total

inductance of this circuit?

A. 80 mh

B. 15 mh

C. 66 mh

D. 30 mh

 

21. A circuit contains four 20 µH inductors connected in series. What is the total inductance of this circuit?

A. 16.2 µH

B. 80 µH

C. 60 µH

D. 24 µH

 

22. A mica capacitor has the color dot code of orange, black, orange. What is the capacitance of this

device?

A. 0.003 microfarads

B. 0.03 microfarads

C. 0.033 microfarads

D. 0.3 microfarads

 

23. Which of the following values is equal to one microfarad?

A. 1 × 10

–6

 F

B. 1 × 10

C. 1 × 10

–9

 F

–12

 F

D. 1 × 10

–3

 F

 

24. What is the time constant of a 1 microfarad capacitor and a 200 ohm resistor connected in series?

A. 2 mS

B. 200 µS

C. 20 µS

D. 20 mS

 

25. What type of meter is used to directly find the capacitance value of an unknown capacitor or to check

the condition of a known capacitor?

A. Oscilloscope

B. VOM meter

C. Megohm meter

D. LCR meter 

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