Signals and Switches - General Questions (3)

Directions to Solve

Signals and Switches - General Questions

17.

If the input voltage on D₁ in the given figure is changed to 0 V, what is the output voltage V_out?

mcq2_1020_1 (2)

A.	–5 V
B.	0 V
C.	+5 V
D.	+4.3 V

Answer: Option B

Explanation:

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18.

What is the output voltage V_out for the given circuit if the input voltage changes to 0 V?

mcq2_1029_1 (2)

A.	+12 V
B.	+15 V
C.	+3 V
D.	0 V

Answer: Option A

Explanation:

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19.

TTL logic chips must have connections to V_cc and ground, even if all inputs and outputs are properly used and tied to valid signals.

A.	True
B.	False

Answer: Option A

Explanation:

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20.

What is the period of a clock waveform that has a frequency of 15.4 kHz?

A.	649
B.	6.49
C.	64.9
D.	0.649

Answer: Option C

Explanation:

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21.

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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22.

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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23.

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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24.

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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Signals and Switches - General Questions (3)

Signals and Switches - General Questions

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