Exercise: Flip Flops And Timers

Questions for: Flip Flops And Timers

The truth table for an S-R flip-flop has how many VALID entries?
A:
3
B:
1
C:
4
D:
2
Answer: A
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An astable multivibrator is a circuit that:
A:
has two stable states
B:
is free-running
C:
produces a continuous output signal
D:
is free-running and produces a continuous output signal
Answer: C
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The equation for the output frequency of a 555 timer operating in the astable mode is: mcq24_1009_1.gif.
What value of C1 will be required if R1 = 1 komega.gif, R2 = 1 komega.gif, and f = 1 kHz?
A:
0.33 mu.gifF
B:
0.48 mu.gifF
C:
480 mu.gifF
D:
33 nF
Answer: B
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If both inputs of an S-R NAND latch are LOW, what will happen to the output?
A:
The output would become unpredictable.
B:
The output will toggle.
C:
The output will reset.
D:
No change will occur in the output.
Answer: A
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One example of the use of an S-R flip-flop is as a(n):
A:
transition pulse generator
B:
astable oscillator
C:
racer
D:
switch debouncer
Answer: D
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