AC. Resonance. Generator, transformer

Grade 11, section 1 — final lesson. Lesson 2: Faraday induction, self-induction LL, and energy Wm=LI2/2W_m = LI^2/2. Alternating current (AC) periodically reverses direction; mains ν=50\nu = 50 Hz (T=0.02T = 0.02 s in Europe).

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