Malvino Chapter 9

Chapter 9 

1. For dc, the current in a coupling circuit is 
a. Zero 
b. Maximum 
c. Minimum 
d. Average 

2. The current in a coupling circuit for high frequencies is 
a. Zero 
b. Maximum 
c. Minimum 
d. Average 

3. A coupling capacitor is 
a. A dc short 
b. An ac open 
c. A dc open and an ac short 
d. A dc short and an ac open 

4. In a bypass circuit, the top of a capacitor is 
a. An open 
b. A short 
c. An ac ground 
d. A mechanical ground 

5. The capacitor that produces an ac ground is called a 
a. Bypass capacitor 
b. Coupling capacitor 
c. Dc open 
d. Ac open 

6. The capacitors of a CE amplifier appear 
a. Open to ac 
b. Shorted to dc 
c. Open to supply voltage 
d. Shorted to ac 

7. Reducing all dc sources to zero is one of the steps in getting the 
a. DC equivalent circuit 
b. AC equivalent circuit 
c. Complete amplifier circuit 
d. Voltage-divider biased circuit 

8. The ac equivalent circuit is derived from the original circuit by shorting all 
a. Resistors 
b. Capacitors 
c. Inductors 
d. Transistors 

9. When the ac base voltage istoo large, the ac emitter current is 
a. Sinusoidal 
b. Constant 
c. Distorted 
d. Alternating 

10. In a CE amplifier with a large input signal, the positive half cycle of the ac emitter current is 
a. Equal to the negative half cycle 
b. Smaller than the negative half cycle 
c. Larger than the negative half cycle 
d. Equal to the negative half cycle 

11. Ac emitter resistance equals 25 mV divided by the 
a. Quiescent base current 
b. DC emitter current 
c. AC emitter current 
d. Change in collector current 

12. To reduce the distortion ina CE amplifier, reduce the 
a. DC emitter current 
b. Base-emitter voltage 
c. Collector current 
d. AC base voltage 

13. If the ac voltage across the emitter diode is 1 mV and the ac emitter current is 0.1 mA, the ac resistance of the emitter diode is 
a. 1 ohm 
b. 10 ohm 
c. 100 ohm 
d. 1 kohm 

14. A graph of ac emitter current versus ac base-emitter voltage applies to the 
a. Transistor 
b. Emitter diode 
c. Collector diode 
d. Power supply 

15. The output voltage of a CE amplifier is 
a. Amplified 
b. Inverted 
c. 180 degrees out of phase with the input 
d. All of the above 

16. The emitter of a CE amplifier has no ac voltage because of the 
a. DC voltage on it 
b. Bypass capacitor 
c. Coupling capacitor 
d. Load resistor 

17. The voltage across the load resistor of a CE amplifier is 
a. Dc and ac 
b. DC only 
c. AC only 
d. Neither dc nor ac 

18. The ac collector current is approximately equal to the 
a. AC base current 
b. AC emitter current 
c. AC source current 
d. AC bypass current 

19. The ac emitter current times the ac emitter resistance equals the 
a. Dc emitter voltage 
b. AC base voltage 
c. AC collector voltage 
d. Supply voltage 

20. The ac collector current equals the ac base current times the 
a. AC collector resistance 
b. DC current gain 
c. AC current gain 
d. Generator voltage




Also try:

Malvino Chapter 1
Malvino Chapter 2
Malvino Chapter 3
Malvino Chapter 4
Malvino Chapter 5
Malvino Chapter 6
Malvino Chapter 7
Malvino Chapter 8
Malvino Chapter 10
Malvino Chapter 11
Malvino Chapter 12
Malvino Chapter 13
Malvino Chapter 14
Malvino Chapter 15
Malvino Chapter 16
Malvino Chapter 17
Malvino Chapter 18
Malvino Chapter 19
Malvino Chapter 20
Malvino Chapter 21
Malvino Chapter 22
Malvino Chapter 23
Malvino Chapter 24