# Electronics and Communication Engineering - Analog Electronics

31.

For dc the current through coupling capacitor in CE amplifier circuit is

 A. very high B. high C. low D. zero

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

 A. increases B. remains the same C. increases or decreases D. decreases

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 =

 A. +30 V B. +20 V C. 10 V D. zero

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

 A. 40 mA B. 20 mA C. 10 mA D. 5 mA

Explanation:

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

35.

An integrating amplifier has resistance in feedback path.

 A. True B. False