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4.2 Refer to FIGURE 4.2 below and answer the questions that follow - NSC Electrical Technology Electronics - Question 4 - 2022 - Paper 1
Question 4
4.2 Refer to FIGURE 4.2 below and answer the questions that follow. 4.2.1 Draw a fully labelled IEC symbol of a unijunction transistor. 4.2.2 On the ANSWER SHEET f... show full transcript
Worked Solution & Example Answer:4.2 Refer to FIGURE 4.2 below and answer the questions that follow - NSC Electrical Technology Electronics - Question 4 - 2022 - Paper 1
Step 1
4.2.1 Draw a fully labelled IEC symbol of a unijunction transistor.
Answer
To draw the IEC symbol of a unijunction transistor, represent it with three terminals: the emitter (E) and two bases (B1 and B2). The symbol is typically shown as a triangle with the base terminals at the ends of the triangle, indicating the direction of current flow towards the emitter. Ensure to label each terminal clearly.
Step 2
4.2.2 On the ANSWER SHEET for QUESTION 4.2, indicate the pinch-off voltage on the output characteristic curve if $V_{GS} = -1 V$.
Answer
The pinch-off voltage is the specific gate-source voltage () at which the channel conducting current becomes fully depleted. For , the pinch-off voltage is denoted on the output characteristic curve as the value along the voltage axis where the curve begins to flatten out. For this question, label the characteristic curve accordingly, indicating the pinch-off voltage point on the graph.