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Semiconductor Electronics Fundamentals Test
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Semiconductor Electronics Fundamentals Test
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25 Questions

1. An SCR combines the features of_____.
2. A three-stage amplifier has a first-stage voltage gain of 100 - a second stage voltage gain of 200 and a third stage gain of 400. The total voltage gain in db will be _____.
3. The slope of the D.C load line of a transistor circuit having a collector load Rc is _____.
4. The output characteristics of an FET closely resemble the plate characteristics of a________ valve.
5. If the input to a differentiating circuit is a square wave - the output will be _____.
6. A P-type material is _____.
7. The complementary MOS(CMOS) uses _____.
8. A vacuum tube conducts current _____.
9. An SCR is a solid state equivalent of a _____.
10. For good stabilization of the operating point in a voltage divider bias - the current I - flowing through potential dividers R1 and R2 - should be equal to or greater than _____. (IB-base current)
11. An :FET is a _____.
12. If the A.C input to a half-wave rectifier has an R.M.S valve of 400/√2 v - the peak inverse voltage will be _____.
13. A D.C milliammeter connected to a half-wave rectifier supplying a maximum current of 10mA will read _____.
14. If in a transistor IE = 10.5mA - IC = 10mA - the value of β will be _____.
15. A varactor diode can function as a variable capacitor with a________ forward bias.
16. In an R-C phase shift oscillator - an R-C network is designed to introduce a phase shift of _____ .
17. According to the Barkhausen criterion for oscillators_______. A -“ open loop gain β -“ feed back factor
18. In the d.c. equivalent circuit of a transistor amplifier - the capacitors are regarded as _____.
19. Radio frequencies have their range above _____.
20. If a circuit of full-wave centre-tapped rectifier with capacitor filter employs a load RL = 100Ω - and C = 1050µF and the frequency is 50HZ - what would be the ripple factor?
21. Tuning is generally accomplished by varying _____.
22. The impedance of a parallel tuned circuit at resonance is _____.
23. The output frequency of a half-wave rectifier is _____.
24. Two identical germanium diodes are connected in series opposition. A 10V battery is impressed upon this series arrangement. What will be the voltage across each diode room temperature if the Zener breakdown voltage of each diode is 9.8V?
25. In the collector feedback biasing - β = 57 - RC = 1 kΩ - IB = 60µA and VCB = 4.5V. The value of the stability factor will be _____.

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