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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 5
46.
An increase in ambient temperature means that maximum power rating of transistor
will increase
will decrease
may increase or decrease
may increase or remain the same
Answer: Option
Explanation:

Increase of ambient temperature means that heat dissipation is slower.

47.
Two CE stages are coupled through a capacitor. To calculate the quiescent base current of the two transistors, the capacitor is treated as
open circuit
short circuit
neither (a) nor (b)
either (a) or (b)
Answer: Option
Explanation:

Capacitor has infinite impedance for dc.

48.
If it is desired to have low output impedance in an amplifier circuit then we should use
common collector circuit
common base circuit
common emitter circuit
either (b) or (c)
Answer: Option
Explanation:

Therefore CC configuration is used for impedance matching.

49.
Generally the gain of a transistor amplifier falls at high frequencies due to the
internal capacitance of device
coupling capacitor at the I/P
skin effect
coupling capacitor at the O/P
Answer: Option
Explanation:

At high frequency, internal capacitance comes into consideration.

50.
Which one of the following is connect expression of id for figure?
0
id1 - id2
Answer: Option
Explanation:

iD = iD1 + iD2

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