1. The three basic parts of a transistors are the base, the collector and the, cathode anode emitter bias
2. The two very useful semi-conductors are germanium and, diamond tungsten silicon arsenic
3. A varactor is negative bias diode variable capacitance diode avalance diode reverse polarity diode
4. The minority carrier in a P-type semi-conductor is electrons holes neutrons protons
5.The majority carrier in a N-type semi-conductor is
electrons holes neutrons protons 6. The majority carrier in a P-type semi-conductor is electrons holes neutrons protons
7. Zener diodes are diodes, which has negative polarity has variable capacitance diode that operate on its avalanche voltage negative biased diodes
8. The ratio of collector current to the base current of a transistor is,r alpha gamma mu beta
9. The greatest advantage of transistor over a vacuum tube is, cost efficiency size availability
10.Commonly used diode as RF switch, zener pin varactor tunnel diode
11. The three terminals of a silicon controlled rectifier (SCR) are the anode, cathode, emitter collector base gate
12. Type of diodes normally used in voltage regulator circuits zener pin tunnel varactor
13. What is the forward resistance of an ideal diode very large value infinity unity zero
14. What diode has a negative resistance, zener pin tunnel varactor
15. A vacuum tube having a filament, a cathode and anode is, diode triode tetrode pentode
16. A vacuum tube having a filament, a cathode, anode and control grid is, diode triode tetrode pentode
17. Reyleight fading occurs several times per minute during, groundwave skywave troposcatter ionospheric propagation
18. Two inductors valued at 20 henry and 60 henry respectively are connected in parallel. What is the total equivalent inductance? 80 henry 30 henry 15 henry 5 henry
19. Two capacitor valued at 40 uF and 60 uF are connected in series, the total equivalent capacitance is, 100 uF 20 uF 7.5 uF 24 uF
20. The beta of a transistor is its, plate resistance of the transistor current amplification factor transconductance mutual conductance 21. The sub-harmonic of 1,000 KHz is, 2,000 KHz 3,000 KHz 4,000 KHz 500 KHz 22. A conductive circuit pattern applied to one or both sides of an insulating substrate is known as, IC's FET's printed circuit micro processors 23. 3 db points are also known as, full power points half-power points maximum power points minimum power points 24. What is the capacitive reactance of a capacitor whose value is 350 pf, operating on frequency 1,200 KHz? 379 ohms 1,570 ohms 157 ohms 950 ohms 25.A series circuit consists of an inductance of 500 uH and a capacitance of 400 pF. What is the resonant frequency? 20 KHz 900 KHz 356 KHz 100 KHz
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