1.1 A/n .. - NSC Electrical Technology Digital - Question 1 - 2022 - Paper 1
Question 1
1.1 A/n ... is an occurrence when a serious or unexpected dangerous situation occurs that requires immediate attention.
1.2 A ... is used to eliminate switch bounce ... show full transcript
Worked Solution & Example Answer:1.1 A/n .. - NSC Electrical Technology Digital - Question 1 - 2022 - Paper 1
Step 1
1.1 A/n ... is an occurrence when a serious or unexpected dangerous situation occurs that requires immediate attention.
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Answer
This describes an evacuation procedure.
Step 2
1.2 A ... is used to eliminate switch bounce in electronics circuits.
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Answer
The device that is used for this purpose is a monostable multivibrator.
Step 3
1.3 A circuit used in an audio mixer to individually amplify or attenuate each input signal is the ...
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Answer
This circuit is referred to as an audio amplifier.
Step 4
1.4 A basic op-amp comparator circuit uses ...
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Answer
A basic op-amp comparator circuit uses feedback.
Step 5
1.5 A ... produces an output which is directly proportional to the rate of change of input with no feedback.
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Answer
A passive RC integrator produces this type of output.
Step 6
1.6 An op-amp circuit without any feedback has ... gain.
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Answer
An op-amp circuit without feedback has open-loop gain.
Step 7
1.7 The pin that sets the voltage at which the 555 will trigger is known as ...
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This pin is known as the threshold.
Step 8
1.8 A J-K flip-flop output is in a 'no change' condition when ...
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Answer
This condition occurs when J = 1, K = 0.
Step 9
1.9 Choose the correct number of flip-flops that are required to construct a ...
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Answer
To construct a decade counter, 5 flip-flops are required.
Step 10
1.10 Counters that are not triggered at the same time are called ...
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These are known as asynchronous counters.
Step 11
1.11 ... is the type of register that would shift a complete binary number in one bit at a time and shift all the stored bits out one bit at a time.
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This is called a Parallel-in: Parallel-out register.
Step 12
1.12 The term RAM means ... with reference to microcontrollers.
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RAM stands for random access memory.
Step 13
1.13 The communication protocol that only requires two signal lines is called the ...
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This protocol is known as the Serial communication interface.
