Quality factor (Q)
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Canadian Advanced Exam Question Bank

effective 4/01/2007

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A-001-05: Quality factor (Q)

A-001-05-01: What is the Q of a parallel R-L-C circuit, if it is resonant at 14.128 MHz, L is 2.7 microhenrys and R is 18 kilohms?

75.1

7.51

0.013

71.5



A-001-05-02: What is the Q of a parallel R-L-C circuit, if it is resonant at 14.128 MHz, L is 4.7 microhenrys and R is 18 kilohms?

43.1

13.3

0.023

4.31



A-001-05-03: What is the Q of a parallel R-L-C circuit, if it is resonant at 4.468 MHz, L is 47 microhenrys and R is 180 ohms?

0.136

7.35

0.00735

13.3



A-001-05-04: What is the Q of a parallel R-L-C circuit, if it is resonant at 14.225 MHz, L is 3.5 microhenrys and R is 10 kilohms?

31.9

7.35

0.0319

71.5



A-001-05-05: What is the Q of a parallel R-L-C circuit, if it is resonant at 7.125 MHz, L is 8.2 microhenrys and R is 1 kilohm?

2.73

36.8

0.368

0.273



A-001-05-06: What is the Q of a parallel R-L-C circuit, if it is resonant at 7.125 MHz, L is 10.1 microhenrys and R is 100 ohms?

0.221

22.1

0.00452

4.52



A-001-05-07: What is the Q of a parallel R-L-C circuit, if it is resonant at 7.125 MHz, L is 12.6 microhenrys and R is 22 kilohms?

39

22.1

0.0256

25.6



A-001-05-08: What is the Q of a parallel R-L-C circuit, if it is resonant at 3.625 MHz, L is 3 microhenrys and R is 2.2 kilohms?

32.2

25.6

31.1

0.031



A-001-05-09: What is the Q of a parallel R-L-C circuit, if it is resonant at 3.625 MHz, L is 42 microhenrys and R is 220 ohms?

0.23

2.3

4.35

0.00435



A-001-05-10: What is the Q of a parallel R-L-C circuit, if it is resonant at 3.625 MHz, L is 43 microhenrys and R is 1.8 kilohms?

1.84

0.543

54.3

23



A-001-05-11: Why is a resistor often included in a parallel resonant circuit?

To decrease the Q and increase the bandwidth

To increase the Q and decrease the skin effect

To decrease the Q and increase the resonant frequency

To increase the Q and decrease bandwidth





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A-002-01: Germanium, silicon, gallium arsenide, doping, P-type, N-type
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