What is the frequency of a clock waveform if the period of that waveform is 1.25

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Question
What is the frequency of a clock waveform if the period of that waveform is
1.25 µs?
Options
A. 8 kHz
B. 0.8 kHz
C. 0.8 MHz
D. 8 MHz

Correct Answer

0.8 MHz

Signals and Switches problems

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3. Why does the TTL family use a totem-pole circuit on the output?
Options
A. It provides active pull-up.
B. It provides active pull-down.
C. It provides active pull-up and active pull-down.

4. An indication of cutoff in an NPN bipolar transistor is that the:
Options
A. collector current is maximum
B. collector-to-emitter voltage equals zero
C. base-to-emitter voltage equals 0.7 V
D. collector to emitter appears to be open

6. What can a relay provide between the triggering source and the output that semiconductor switching devices cannot?
Options
A. total isolation
B. faster
C. higher current rating
D. total isolation and higher current rating

8. What is the advantage of using serial data transmission over parallel data transmission?
Options
A. It is slower.
B. Only one pair of wires is required.
C. More people use it.
D. It is faster.

9. The hexadecimal number 4B₁₆ is transmitted as an 8-bit word in parallel. What is the time required for this transmission if the clock frequency is 2.25 MHz?
Options
A. 444 ns
B. 444 µs
C. 3.55 µs
D. 3.55 ms

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