p-n junction diode under forward biasअग्रदिशिक बायस में p-n संधि डायोडp-n junction diode under forward bias
NCERT Fig 14.13 · Class 12 Physics · Chapter 14 · interactive diagram
Read Chapter 14 with this diagramइस डायग्राम के साथ अध्याय 14 पढ़ेंIs diagram ke saath Ch 14 padhiyeAll Physics diagramsसभी भौतिकी डायग्रामSaare Physics diagrams
Parts and what they mean
- p-side → battery + (p-ओर → बैटरी +) — Forward bias: the p-side is joined to the positive terminal.
- n-side → battery − (n-ओर → बैटरी −) — The n-side is joined to the negative terminal.
- Battery (forward) (बैटरी (अग्रदिशिक)) — Its voltage V is opposite to the built-in potential V0, and drops almost entirely across the depletion region (it has very high resistance compared with the p and n sides).
- Depletion region — narrower (अवक्षय क्षेत्र — पतला) — Forward bias decreases the width of the depletion layer.
- Fixed ions (स्थिर आयन) — Fewer uncovered ions as the layer narrows.
- (a) Circuit ((a) परिपथ) — Diode under forward bias.
- Forward current (अग्र धारा) — Conventional current flows p → n inside the diode; usually milliamperes.
- (b) Barrier potential ((b) विभव प्राचीर) — Potential across the junction for different battery voltages.
- (1) Without battery: V0 ((1) बिना बैटरी: V0) — Equilibrium barrier.
- (2) Low battery voltage: V0 − V ((2) कम बैटरी वोल्टता: V0 − V) — Barrier slightly lowered: only carriers in the uppermost energy levels cross; small current.
- (3) High battery voltage ((3) अधिक बैटरी वोल्टता) — Barrier much lower: many more carriers cross, current rises steeply.
- Holes (होल) — Pushed towards the junction and injected into the n-side.
- Electrons (इलेक्ट्रॉन) — Pushed towards the junction and injected into the p-side.
Original diagram drawn by Simple Learning Hub, based on NCERT Fig 14.13. Report a mistake