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Electricity and Shabbat: Part 1 - General Principles
Under what category of melacha does electricity fall - the machloket between the Chazon Ish and Rav Shlomo Zalman Auerbach.
The distinction between the electricity itself and what it does (e.g. sewing machine vs. fan).
Delivered at the OU Israel Center, May 2nd, 2018, 17 Iyyar 5778