What is the functional purpose of the Zener...

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Question 1 of 2066636eed28f7522a1c51d641

What is the functional purpose of the Zener diode "CR1" as shown in section "D" of the regulated DC power supply? Illustration EL-0085

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Question 1 of 20

66636eed28f7522a1c51d641

What is the functional purpose of the Zener diode "CR1" as shown in section "D" of the regulated DC power supply? Illustration EL-0085

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🔍 Key Concepts

• Zener diode characteristics – how voltage behaves when reverse-biased beyond its Zener voltage • Basic series-pass regulator layout: where the pass transistor, load, and reference element are placed • Difference between current-limiting devices and voltage-regulating devices in a DC supply

💭 Think About

• Look at section D: how is CR1 connected relative to the load RL and the transistor Q1 – is it in series with the current path, or shunting across the output? • If the output voltage at TP5 tries to rise above a certain level, what will a reverse‑biased Zener do to the base bias of Q1 and, in turn, to the output voltage? • Which component in this section could realistically limit current, and which one is better suited to establish a stable reference voltage?

✅ Before You Answer

• Verify whether CR1 is reverse‑biased during normal operation and tied across the regulated output line, a typical clue for a voltage reference/regulator role. • Check if any component is actually in series with the load current; that is the one most likely to prevent excessive current, not a shunt Zener in this configuration. • Confirm that power factor correction and temperature compensation are usually associated with other types of components or circuit locations, not a Zener placed as shown in section D.

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Question 1 of 2066636eed28f7522a1c51d641

What is the functional purpose of the Zener diode "CR1" as shown in section "D" of the regulated DC power supply? Illustration EL-0085

Back

Question 1 of 20

66636eed28f7522a1c51d641

What is the functional purpose of the Zener diode "CR1" as shown in section "D" of the regulated DC power supply? Illustration EL-0085

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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