Key relationship
Vzener=min(Vs,Vz); I=max(0,Vs−Vz)/Rseries.
Physics · Practical apparatus
Zener reverse-breakdown meters
Raise the reverse source through breakdown while monitoring both meters. The diode voltage clamps approximately while resistor voltage and current increase. Compare two resistor settings at the same source.
Open the interactive experiment →Zener reverse-breakdown meters
பின்னோக்குச் sourceஐ breakdown வழியாக உயர்த்தி இரு மீட்டர்களையும் கவனிக்கவும். டையோடு மின்னழுத்தம் நிலைத்து மின்னோட்டம் அதிகரிக்கும்.
Key notes, relationships and model limits
Practical tip
Raise the reverse source through breakdown while monitoring both meters. The diode voltage clamps approximately while resistor voltage and current increase. Compare two resistor settings at the same source.
Common trap
An ideal clamp approximation does not mean the current can grow without resistor or rating constraints.
Model limits
Ideal abrupt Zener breakdown; below-threshold leakage ignored. Current-limiting resistor always present; dynamic resistance, heating and maximum ratings omitted.
What you will learn
Read a virtual reverse-breakdown characteristic with current limiting.
Try the experiment
Try both scenarios, change one control, and predict the result before checking the graph and readouts.
Think of it this way
Change one input while keeping the others fixed, as you would in a controlled experiment.
Worked example
Vs8 V,Vz5.1 V,R500 Ω gives5.8 mA.
Why this matters
The model connects zener reverse-breakdown meters with an observable reading. Check the equation and assumptions before applying it.
Before you start
SI units · algebra · graph reading
Check your understanding
Above ideal breakdown, extra source voltage mainly appears across?
- The Zener as unlimited voltage
- The series resistor
- No component
Read the explanation
The ideal Zener voltage is clamped.
Course connection: Virtual apparatus preparation. Check exact board/exam membership in the syllabus sources. Physical practical work remains necessary.