EEC 214(ELETRONICS) SOLVED PAST QUESTION

Electronics two solved past question for first semester ND2 EEC 214

DEFINE THE FOLLOWING TERMS

1. D.C LOAD LINE: The straight line joining it cut off point with the saturation point is known as D.C load line.
2. A.C LOAD LINE: It’s the line in which the quiescent point sift up and down, when changes in the output voltage and current is caused by the A.C signal

STATE THREE TRANSISTOR CONFIGURATION YOU KNOW

1. Common base CB
2. Common emitter CE
3. Common collector CC

STATE THE MODES OF OPERARATION OF A BJT BIASING OPERATION OF THE JUNCTION

• Cut-off region
• Saturation region
• Active region
• Inverted  region

EXPLAIN FOUR (4) WAYS BY WHICH THE TWO JUNCTION OF A TRANSISTOR ARE BIASED

• Both Junction forward biased
• Both Junction reversed biased
• Base emitter BE forward biased, Base collector BC reversed biased
• Base emitter BE reversed biased, Base collector BC forward biased

STATE TWO ADVANTAGES OF JFET

• Higher input impedance
• Low distortion OR generate less noise
• Higher resistance to nuclear radiation.

STATE THREE ESSENTIAL OF TRANSISTOR CIRCUIT

• Collector current must be zero
• Stability  
• The value for germanium must not be below 0.5v, and silicon must have an electron affinity of 4.05ev

Identify two factors that affect the transistor

• Change in temperature
• Change in power supply 
• Ageing of component

Identify ways of coupling a transistor.

• Transformer coupling
• Resistance or capacitance coupling 
• Inductance capacitor coupling
• Direct coupling

WHAT’S FAITHFUL AMPLIFICATION: Faithful amplification is the raising of a weak signal without change in the shape of the signal.

Amplification factor: Raising the strength signal.