How resistivity changes with temperatureताप के साथ प्रतिरोधकता कैसे बदलती हैHow resistivity changes with temperature

NCERT Fig 3.8–3.10 · Class 12 Physics · Chapter 3 · interactive diagram

Parts and what they mean

• Metal (copper) (धातु (ताँबा)) — Hotter → ions vibrate more → more collisions, smaller τ → ρ increases. Roughly linear: α is positive.
• Alloy (nichrome) (मिश्रधातु (नाइक्रोम)) — High resistivity that hardly changes with temperature — ideal for heaters and standard resistors (manganin, constantan are similar).
• Semiconductor (अर्धचालक) — Heating frees more charge carriers (n increases), so ρ decreases: α is negative.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 3.8–3.10. Report a mistake