Electronics and Communication Engineering - Analog Electronics

11. 

Which component is allowed to pass through it by a choke filter?

A. Dc
B. Ac
C. Both dc and ac
D. Only high frequency ac

Answer: Option A

Explanation:

XL is zero for dc.


12. 

In an amplifier the stray capacitances assume impedance at low frequencies

A. True
B. False

Answer: Option B

Explanation:

Stray capacitances assume importance at high frequencies because .


13. 

In CE amplifier the base current is very high.

A. True
B. False

Answer: Option B

Explanation:

Base current is small.


14. 

In the graphical analysis of CE amplifier circuit, the upper end of load line is called

A. saturation point
B. cut off point
C. Q point
D. none of the above

Answer: Option A

Explanation:

Current is maximum at saturation point.


15. 

A full wave rectifier supplies a load of 1 kΩ. The a.c. Voltage applied to the diodes is 220 - 0 - 220 Volts rms. If diode resistance is neglected, then Average d.c. Voltage

A. 220 V
B. 200 V
C. 198 V
D. 0 volts

Answer: Option C

Explanation:

.