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
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 the a... show full transcript
Worked Solution & Example Answer: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
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Answer
A third-degree burn, also known as a full-thickness burn, impacts all layers of the skin, including the epidermis and the dermis, and may also affect the underlying tissues. Hence, 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 series circuit, the power factor will be lagging when the inductive reactance (XL) is greater than the capacitive reactance (XC). Therefore, 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 united (1) when …
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Answer
The power factor will be unity when the reactance due to the inductance and capacitance balance each other out—specifically, when:
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 impedance is at its maximum, causing the total current to be maximum as well. Hence, the correct option 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
This description fits the function of a field-effect transistor, which utilizes an electric field to control the flow of current. Therefore, 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
Applying a signal to the inverting input results in a phase shift of 180 degrees. Hence, the answer is:
D. unity-gain frequency.
Step 7
Negative feedback in an op amp ...
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Answer
Negative feedback helps to stabilize the gain and bandwidth by decreasing the output impedance. Thus, 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 refers to when a feedback resistor is not connected from the output to the input of the op amp. Therefore, the answer is:
A. a feedback resistor is connected from the output to the inverting 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
The expected output waveform from a differentiator when a triangular waveform is applied is a square waveform. Hence, the answer is:
D. square waveform.
Step 10
The basic circuit of a passive RC differentiator is a ...
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Answer
A passive RC differentiator consists of a resistor and a capacitor in series with the input and output placed accordingly. Therefore, the correct answer is:
B. resistor in series with the input and a capacitor in parallel with the output.
Step 11
In a class C amplifier, the output collector current will flow through the transistor for ... of the input cycle.
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Answer
A class C amplifier is known for conducting for less than 180 degrees of the input signal. Thus, the answer is:
D. less than 180°.
Step 12
The operation of a relaxation oscillator is based on ...
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Answer
A relaxation oscillator operates on the principle of charging and discharging a capacitor at a controlled rate. Therefore, the answer is:
A. the charging and discharging of a capacitor.
Step 13
For an oscillator to maintain oscillation, the gain must be ...
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Answer
An oscillator requires a gain greater than one to maintain continuous oscillations. Consequently, the answer is:
C. greater than 1.
Step 14
A bipolar junction transistor class B push-pull amplifier with no transformer coupling uses ...
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Answer
This configuration relies on two complementary transistors to amplify the signal effectively. Therefore, the answer is:
