Digital Electronics - Signals and Switches
Exercise :: Signals and Switches - General Questions
| 16. |
The serial format for transmitting binary information uses: |
| A. |
a single conductor | | B. |
multiple conductors | | C. |
infrared technology | | D. |
fiber-optic |
Answer: Option A
Explanation:
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| 17. |
Which device(s) have almost ideal ON and OFF resistances? |
| A. |
electromechanical relays | | B. |
manual switches | | C. |
semiconductor devices (diodes and transistors) | | D. |
electromechanical relays and manual switches |
Answer: Option D
Explanation:
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| 18. |
A diode placed in parallel across a relay coil serves what function? |
| A. |
to regulate input voltage | | B. |
to protect the coil from arcing | | C. |
to ensure most of the current passes through the coil | | D. |
to reduce arcing across the relay contacts |
Answer: Option B
Explanation:
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| 19. |
Serial communication can be sped up by: |
| A. |
using silver or gold conductors instead of copper | | B. |
using high-speed clock signals | | C. |
adjusting the duty cycle of the binary information | | D. |
using silver or gold conductors instead of copper and high-speed clock signals |
Answer: Option B
Explanation:
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| 20. |
What is the period of a clock waveform that has a frequency of 15.4 kHz? |
Answer: Option C
Explanation:
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