Computer Science - Electronic Principles
Exercise :: Electronic Principles - Section 3
| 11. |
What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm? |
| A. |
60 Ohm | | B. |
99.3 Ohm | | C. |
250 Ohm | | D. |
70.7Ohm | | E. |
None of the above |
Answer: Option D
Explanation:
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| 12. |
Current can flow through a normally open push button switch as long as: |
| A. |
you are pressing the button | | B. |
you are not pressing the button | | C. |
its contact remain open | | D. |
its contact remain open | | E. |
None of the above |
Answer: Option B
Explanation:
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| 13. |
Doubling the operating frequency of a purely capacitive circuit: |
| A. |
has no effect on the total circuit current | | B. |
doubles the amount of total current | | C. |
cuts the total current by one-half | | D. |
thrice the amount of total current | | E. |
None of the above |
Answer: Option B
Explanation:
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| 14. |
How much current flows through a 0.02 micro F capacitor that is operating from a 12-V ac, 100-Hz source? |
| A. |
0.151 mA | | B. |
157 raA | | C. |
0.995 mA | | D. |
2.02 A | | E. |
None of the above |
Answer: Option A
Explanation:
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| 15. |
An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current? |
| A. |
28.4 mA | | B. |
24.2 mA | | C. |
34.4 mA | | D. |
68.4 mA | | E. |
None of the above |
Answer: Option B
Explanation:
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