Astable Multivibrator Operation

Question 1

The purpose of an astable multivibrator is to _______.

convert AC energy to sinusoidal AC energy
convert DC energy to sinusoidal AC energy
convert DC energy to square wave energy
convert AC energy to square wave energy

Answer 1

convert DC energy to square wave energy

Question 2

When Q2 turns ON, Q1 is turned OFF by _______.

C1 charging
C2 charging
C1 discharging
C2 discharging

Answer 2

C2 discharging

Question 3

In this astable multivibrator, what components determine the frequency of the output square wave?

C1,R2 and C2,R3
C1,R1 and C2,R4
C1,R4 and C2,R1
C1,R1 and C2,R2

Answer 3

C1,R2 and C2,R3

Question 4

In an astable multivibrator, with Q1 ON, Q2 is turned ON by _______.

C1 charging
C2 charging
C1 discharging
C2 discharging

Answer 4

C1 charging

Question 5

In this astable multivibrator, what component is the collector load resistor for Q2?

R1
R2
R3
R4

Answer 5

R4

Question 6

In this astable multivibrator, the purpose of C1, C2, R2, R4, and D2 is _______.

to ensure sharp rise times
external synchronizing
frequency control
symmetry control

Answer 6

external synchronizing

Question 7

In this astable multivibrator, the purpose of D1 and D3 is _______.

to ensure sharp rise times
external synchronizing
frequency control
symmetry control

Answer 7

to ensure sharp rise times

Question 8

The frequency of this astable multivibrator is _______.

885 Hz

1. 13 kHz
2. 26 kHz
3. 43 kHz

Answer 8

1.26 kHz

Question 9

The frequency of this astable multivibrator is _______.

795 Hz

1. 13 kHz
2. 59 kHz
3. 27 kHz

Answer 9

1.13 kHz

Question 10

In this astable multivibrator, the purpose of R5 is _______.

symmetry control
frequency control
external synchronizing
to ensure sharp raise time

Answer 10

frequency control