In 1940, a scientist testing a cracked silicon slab uncovered a hidden effect that helped build modern electronics

In 1940, a cracked silicon crystal at Bell Laboratories led Russell Ohl to discover the p-n junction, a pivotal moment for electronics. Strange current jump on a fractured piece of silicon opened the door to solar cells. Image credit – Wikimedia In 1940, a cracked silicon crystal at Bell Laboratories led Russell Ohl to discover…

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SECR Nagpur apprentice recruitment 2026 opens for 1079 posts at apprenticeship portal

Railway SECR Nagpur begins online applications for 1079 apprentice vacancies for 2026-27 South East Central Railway (SECR), Nagpur Division and Workshop Motibagh have invited online applications for engagement of Act Apprentices under the Apprentices Act 1961 and Apprenticeship Rules 1992. The recruitment drive for the 2026-27 session offers 1079 apprenticeship positions across different trades in…

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