IndiaBIX

Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 5
31.
Heat sink results in
slower dissipation of heat to atmosphere
faster dissipation of heat to atmosphere
lower ambient temperature
lower transistor power
Answer: Option
Explanation:

Surface area of heat dissipating surface increases. Therefore heat dissipation is faster.

32.
A buffer amplifier should have
high input impedance and low output impedance
high input impedance and high output impedance
low input impedance and high output impedance
low input impedance and low output impedance
Answer: Option
Explanation:

To provide impedance matching input impedance should be high and output impedance should be low.

33.
In a CE amplifier, the output voltage is equal to product of
ac collector current and ac collector resistance
ac base current and ac collector resistance
ac emitter current and ac emitter resistance
ac collector current and source resistance
Answer: Option
Explanation:

Since output is taken from collector terminal, output voltage is equal to collector current multiplied by collector resistance.

34.
In figure, VG =
2.22 V
22.2 V
0.22 V
0.022 V
Answer: Option
Explanation:

.

35.
A diode can have a very high forward resistance.
True
False
Answer: Option
Explanation:

Forward resistance of diode is low.

Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers