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Refer to FIGURE 2.4 below and answer the questions that follow - NSC Electrical Technology: Digital - Question 2 - 2019 - Paper 1
Question 2
Refer to FIGURE 2.4 below and answer the questions that follow.  2.4.3 Explain why there is a difference in the char... show full transcript
Worked Solution & Example Answer:Refer to FIGURE 2.4 below and answer the questions that follow - NSC Electrical Technology: Digital - Question 2 - 2019 - Paper 1
Step 1
Explain why there is a difference in the charging and discharging times of the capacitor.
Answer
The difference in the charging and discharging times of the capacitor can be attributed to the resistor values in the circuit. When the capacitor charges, it goes through both resistors R1 (20 kΩ) and R2 (2 kΩ), leading to a longer time constant as the total resistance affects the charge time.
During discharge, the capacitor discharges only through R2 (2 kΩ), which is significantly smaller. This results in a shorter time constant during the discharge phase as the capacitor releases its stored energy more quickly.
Step 2
Draw the output signal on ANSWER SHEET 2.4.4.
Answer
The output signal can be drawn as a square wave, where the high state duration corresponds to the charging time of the capacitor and the low state duration corresponds to the discharging time. Given the resistors’ values, the output waveform will appear with different high and low durations reflecting the different time constants involved in the charging and discharging processes.