Conductance & Conductivity (Electrochemistry) | Class 12 + NEET 2026 Chemistry with Hemant Sir!

Hemant Sir explains key concepts about electricity flow in this class. He starts with conductors (like silver or gold), insulators, and semiconductors (like silicon or germanium). He then discusses electrolytic conductors, which only conduct electricity when melted (molten state) or dissolved in water (aqueous state) - solid salt won't conduct! He revisits Ohm's Law (V = IR), defining resistance (R) and its unit, the ohm. Resistance depends on a wire's length and thickness (area of cross-section). He introduces conductance (the ability to let current flow, the opposite of resistance) and its units (mho or siemens). Finally, he covers conductivity (related to how easily a material conducts) and its unit (siemens per meter), linking it to resistivity and the cell constant. He uses simple examples like tea in a steel glass versus a thermocol cup to explain thermal conduction versus electrical conduction. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 📌 𝐃𝐫𝐞𝐚𝐦 𝐌𝐞𝐝𝐢𝐜𝐚𝐥 𝐂𝐨𝐥𝐥𝐞𝐠𝐞 𝐤𝐞 𝐥𝐢𝐲𝐞 𝐏𝐞𝐫𝐟𝐞𝐜𝐭 𝐒𝐡𝐮𝐫𝐮𝐚𝐚𝐭! 🔹 𝐀𝐜𝐡𝐢𝐞𝐯𝐞𝐫 𝐁𝐚𝐭𝐜𝐡 - NEET UG 2026 Online Course - https://applink.adda247.com/d/achieve... 𝐅𝐨𝐫 𝐂𝐥𝐚𝐬𝐬 𝟏𝟐𝐭𝐡 𝐒𝐭𝐮𝐝𝐞𝐧𝐭𝐬:- 🔺One Mahapack - https://applink.adda247.com/d/12thMah... 🔺One Pro Mahapack - https://applink.adda247.com/d/12thPro... 𝐅𝐨𝐫 𝐂𝐥𝐚𝐬𝐬 𝟏𝟏𝐭𝐡 𝐒𝐭𝐮𝐝𝐞𝐧𝐭𝐬:- 🔺One Mahapack - https://applink.adda247.com/d/11thMah... 🔺One Pro Mahapack - https://applink.adda247.com/d/11thPro... Lowest Price Ever! Use Code: 𝐇𝐄𝐌𝐀𝐍𝐓 for Maximum Discount 📞 Call Now for Enrollment Queries: 𝟎𝟕𝟐𝟏𝟕𝟐𝟏𝟕𝟐𝟒𝟕 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 🌐 𝐉𝐨𝐢𝐧 𝐇𝐞𝐦𝐚𝐧𝐭 𝐒𝐢𝐫 𝐓𝐆 𝐂𝐡𝐚𝐧𝐧𝐞𝐥 𝐅𝐨𝐫 𝐍𝐨𝐭𝐞𝐬, 𝐐𝐮𝐢𝐳𝐳𝐞𝐬, 𝐒𝐭𝐮𝐝𝐲 𝐌𝐚𝐭𝐞𝐫𝐢𝐚𝐥 & 𝐌𝐨𝐫𝐞: https://t.me/chemistry_with_hemant ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 📌 𝐅𝐫𝐨𝐦 𝐂𝐨𝐧𝐟𝐮𝐬𝐢𝐨𝐧 𝐓𝐨 𝐒𝐞𝐥𝐞𝐜𝐭𝐢𝐨𝐧:- 🞂 One Counselling for NEET 2025: https://applink.adda247.com/d/Counsel... 🞂 One Pro Counselling for NEET 2025: https://applink.adda247.com/d/Counsel... 📞 CALL NOW: 𝟎𝟕𝟎𝟒-𝟐𝟓𝟕-𝟖𝟐𝟒𝟕 for any Enrollment Queries. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 📌 𝐉𝐨𝐢𝐧 𝐍𝐂𝐄𝐑𝐓 𝐍𝐄𝐄𝐓 𝐀𝐝𝐝𝐚𝟐𝟒𝟕 𝐒𝐨𝐜𝐢𝐚𝐥 𝐌𝐞𝐝𝐢𝐚 𝐅𝐨𝐫 𝐍𝐨𝐭𝐞𝐬, 𝐐𝐮𝐢𝐳𝐳𝐞𝐬, 𝐒𝐭𝐮𝐝𝐲 𝐌𝐚𝐭𝐞𝐫𝐢𝐚𝐥 & 𝐌𝐨𝐫𝐞:- 🌐 Telegram: https://t.me/Ncertneetadda247 🌐 Instagram:   / ncert.adda247   📲 Download ADDA247 App: http://bit.ly/466MKQ3 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 📌 𝐀𝐁𝐎𝐔𝐓 𝐍𝐂𝐄𝐑𝐓 𝐍𝐄𝐄𝐓 𝐀𝐃𝐃𝐀𝟐𝟒𝟕:- Welcome to Adda247, India's Largest Vernacular Learning Platform. NCERT NEET Adda247 is your go-to place for NCERT Class 11th & 12th preparation, along with complete guidance for cracking the NEET UG exam. We provide free and paid courses, video lectures, and study materials to help you crack school exams and the NEET. 🔔 Subscribe Now for Daily NEET Prep –    / @ncertneetadda247   ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ⏰ 𝐓𝐢𝐦𝐞𝐬𝐭𝐚𝐦𝐩𝐬:- 00:00 - Lecture Begins 01:38 - Conductance & Conductivity 05:29 - Types of Conductors 07:19 - Electrolytic Conductors 12:43 - Ohm's Law 15:07 - Resistance & Resistivity 19:20 - Conductance & Units 25:11 - Conductivity & Units ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ #ConductanceAndConductivity #HemantSir #Class12 #NEET2026 #ChemistryLiveClass