1.1 The layer(s) of the skin that is/are affected by a third-degree burn would be …
A - NSC Electrical Technology Electronics - Question 1 - 2022 - Paper 1
Question 1
1.1 The layer(s) of the skin that is/are affected by a third-degree burn would be …
A. The outer layer.
B. The second layer.
C. All layers of the skin.
D. None of t... show full transcript
Worked Solution & Example Answer:1.1 The layer(s) of the skin that is/are affected by a third-degree burn would be …
A - NSC Electrical Technology Electronics - Question 1 - 2022 - Paper 1
Step 1
The layer(s) of the skin that is/are affected by a third-degree burn would be …
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Answer
A third-degree burn affects the epidermis and the dermis layers of the skin, resulting in damage to all layers. Therefore, the correct answer is C: all layers of the skin.
Step 2
The power factor in an RLC series circuit will be lagging if VL …
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Answer
In an RLC circuit, the power factor will lag when the voltage across the inductor (VL) is greater than the voltage across the capacitor (VC). So, the answer is A: is greater than VC.
Step 3
A circuit has a resistance of R ohm, inductance of L henry and a capacitance of C farad connected in series. The power factor of the circuit will be unity (1) when …
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Answer
The power factor is unity (1) when the reactance of the inductor (XL) equals the reactance of the capacitor (XC). Therefore, the answer is C: XL = XC.
Step 4
Which ONE of the following conditions exists in a resonant parallel RLC circuit?
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Answer
In a resonant parallel RLC circuit, the total impedance is maximized. Hence, the correct answer is B: The impedance is maximum.
Step 5
The … is a device that relies on the creation of an electric field within the channel to control current flow.
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Answer
The device that relies on the creation of an electric field within the channel to control current flow is known as a field-effect transistor. Thus, the answer is C: field-effect transistor.
Step 6
When applying a signal to the inverting input of an op amp, phase shift is achieved by the …
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Answer
Phase shift when applying a signal to the inverting input of an op amp is achieved through internal amplifier circuits. Therefore, the answer is B: internal amplifier circuits.
Step 7
Negative feedback in an op amp …
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Answer
Negative feedback in an op amp decreases the output impedance and increases bandwidth. Hence, the answer is B: decreases the output impedance and the bandwidth.
Step 8
Open-loop gain with reference to op amps is when …
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Answer
Open-loop gain is achieved when no feedback resistor is connected from the output to the input. Thus, the answer is B: no feedback resistor is connected from the output to the input.
Step 9
When a triangular waveform is applied to the input of a differentiator, the output waveform will be an …
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Answer
When a triangular waveform is input into a differentiator, the output will produce an inverted triangular waveform. Therefore, the answer is B: inverted triangular waveform.
Step 10
The basic circuit of a passive RC differentiator is a …
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Answer
The basic circuit of a passive RC differentiator consists of a capacitor in series with the input and a resistor in parallel with the output. So, the answer is A: capacitor in series with the input and a resistor in parallel with the output.
Step 11
A/an … circuit is used to clean up an input signal which has been distorted.
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Answer
An integrator circuit is used to clean up distorted input signals by averaging them. Thus, the answer is A: integrator.
Step 12
In a class C amplifier, the output collector current will flow through the transistor for … of the input cycle.
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Answer
In a class C amplifier, the output collector current will flow through the transistor for less than 180° of the input cycle. Therefore, the answer is D: less than 180°.
Step 13
The operation of a relaxation oscillator is based on …
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Answer
A relaxation oscillator operates based on the charging and discharging of a capacitor. Thus, the answer is A: the charging and discharging of a capacitor.
Step 14
For an oscillator to maintain oscillation, the gain must be …
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Answer
For an oscillator to maintain oscillation, the gain must be greater than 1. Hence, the answer is C: greater than 1.
Step 15
A bipolar junction transistor class B push-pull amplifier with no transformer coupling uses …
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Answer
A bipolar junction transistor class B push-pull amplifier primarily uses two complementary NPN and PNP transistors. Thus, the answer is D: complementary symmetrical transistors.
