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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 4
1.
If the Q of a single stage single tuned amplifier is doubled, the bandwidth will
remain the same
become half
become double
become four times
Answer: Option
Explanation:

. If Q is doubles, bandwidth becomes half.

2.
In full wave rectification, if the input frequency is 50 Hz, then frequency at the output of filter is
50 Hz
0 Hz
100 Hz
75 Hz
Answer: Option
Explanation:

Filter output will give d.c. signal and d.c. signal Passed zero frequency.

3.
The circuit in the given figure is
low pass filter
high pass filter
band Pass filter
band reject filter
Answer: Option
Explanation:

It is a L.P.F. of second order.

4.
The turn ratio of a transformer is 20:1, if a load of 10Ω is connected across the secondary, what will be the effective resistance seen looking into the Primary?
2 kΩ
4 kΩ
8 kΩ
32 kΩ
Answer: Option
Explanation:

5.
In a CE amplifier circuit the ac voltage between emitter and ground
is very high
may be high or low
is zero
depends on circuit configuration
Answer: Option
Explanation:

Common emitter means emitter at ground potential.

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