Testing electrical conductivity of a solutionविलयन की विद्युत चालकता का परीक्षण

NCERT Fig 9.15 · interactive diagram

Parts and their functions

• 9 V battery (9 V बैटरी) — Low voltage is safe. Do not touch the electrodes when connected.
• Bulb (बल्ब) — Glows only if the liquid conducts — i.e. it has free ions.
• Carbon or metal electrodes (कार्बन या धातु के इलेक्ट्रोड) — They dip into the sample to complete the circuit.
• Cardboard holder (गत्ते का होल्डर) — Keeps the two electrodes apart.
• Sample solution (नमूने का विलयन) — NaCl or CuSO₄ in water: ions move → bulb glows. Sugar solution: no ions → no glow. Solid NaCl: ions fixed → no glow.
• Beaker (बीकर) — Test each sample one at a time.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 9.15. Report a mistake