IndiaBIX

Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 5
16.
A class C amplifier has input frequency of 200 kHz. If width of collector pulses is 0.1 μs, duty cycle is
1%
2%
10%
20%
Answer: Option
Explanation:

.

17.
Output of a phase splitter is
a pair of sine waves of unequal amplitude
a pair of sine waves of equal amplitudes
a pair of sine waves of equal amplitudes and opposite phase
a pair of sine waves of unequal amplitudes and opposite phase
Answer: Option
Explanation:

A phase shifter gives two voltages which have equal magnitudes but are out of phase by 180°.

18.
In a transistor the minimum and maximum values of βdc are 100 and 121. The proper value of βdc to be used to locate Q point is
100
121
110.5
110
Answer: Option
Explanation:

Lowest value of β should be used to locate Q point.

19.
The input to an op-amp integrating amplifier is a constant voltage. The output will be
a constant voltage
a sawtooth wave
a ramp
ac voltage
Answer: Option
Explanation:

Integral of a constant is t.

20.
FET amplifier is more difficult to analyse than BJT amplifier.
True
False
Answer: Option
Explanation:

FET amplifier is easier to analyse since gate current is negligible.

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