Electronics and Communication Engineering - Analog Electronics

31.
For dc the current through coupling capacitor in CE amplifier circuit is
very high
high
low
zero
Answer: Option
Explanation:

dc remains confined within BJT. Only ac signal comes out.


32.
In a CE amplifier the collector resistance is short circuited. The ac output voltage will
increases
remains the same
increases or decreases
decreases
Answer: Option
Explanation:

Since the output is taken across collector resistance, short-circuiting collector resistance will decrease output voltage.


33.
In a transistor CE mode, VCC = +30 V. If the transistor is in cut off region, VCE =
+30 V
+20 V
10 V
zero
Answer: Option
Explanation:

When transistor is in cut off region VCE = VCC .


34.
The dc load current in a bridge rectifier circuit is 10 mA. The dc load current through each diode is
40 mA
20 mA
10 mA
5 mA
Answer: Option
Explanation:

Since both diodes contribute equal load current, each diode current is 5 mA.


35.
An integrating amplifier has resistance in feedback path.
True
False
Answer: Option
Explanation:

It has capacitance in feedback path.