Signals and Switches Questions and Answers
Signals and Switches form the foundation of Digital Electronics, enabling the understanding of binary logic and circuit design. This section on Signals and Switches questions with answers is crucial for aspirants of GATE, DRDO, and ISRO technical exams. Here, you’ll explore digital signal behavior, voltage levels, transistor switching, and logic circuit implementations. Solving these electronics aptitude questions with explanations builds your understanding of how switching devices control logic states in digital systems. Regular practice ensures better performance in technical exams and interviews focusing on circuit-level analysis and Boolean logic.
Signals and Switches
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27 questions
1. Why does the TTL family use a totem-pole circuit on the output?
- It provides active pull-up.
- It provides active pull-down.
- It provides active pull-up and active pull-down.
2. What is the frequency of a clock waveform if the period of that waveform is 1.25 s?
- 8 kHz
- 0.8 kHz
- 0.8 MHz
- 8 MHz
3. Internally, a computer's binary data are almost always transmitted on parallel channels, commonly referred to as the:
- parallel bus
- serial bus
- data bus
- memory bus
4. Why is parallel data transmission preferred over serial data transmission for most applications?
- It is much slower.
- It is cheaper.
- More people use it.
- It is much faster.
5. With surface-mount technology (SMT), the devices should:
- utilize transistor outline connections
- mount directly
- have parallel connecting pins
- require holes and pads
6. To forward bias a diode, a ________ potential is needed on the ________ and a ________ is needed on the ________.
- negative, cathode, positive, anode
- negative, anode, positive, cathode
7. To forward bias a diode, a ________ potential is needed on the ________ and a ________ is needed on the ________.
- negative, cathode, positive, anode
- negative, anode, positive, cathode
8. Why, in most applications, are transistor switches used in place of relays?
- They consume less power.
- They are faster.
- They are quieter and smaller.
- all of the above
9. The family of logic that is composed of bipolar junction transistors is ____.
- TTL
- CMOS
- DIP
- BJT
10. What can a relay provide between the triggering source and the output that semiconductor switching devices cannot?
- total isolation
- faster
- higher current rating
- total isolation and higher current rating