פרק 13 - אנרגיה: Revision history

5 May 2025

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• curprev 02:3702:37, 5 May 2025‎ EMFWIKIAdmin talk contribs‎ 7,025 bytes +714‎ →‎הספק פולריזציה (איור 2) undo

11 March 2025

• curprev 15:3415:34, 11 March 2025‎ 147.236.156.86 talk‎ 6,311 bytes +2‎ →‎הספק מגנוט undo Tag: Visual edit

20 April 2022

• curprev 15:5015:50, 20 April 2022‎ RonelM talk contribs‎ 6,309 bytes +128‎ No edit summary undo
• curprev 15:4015:40, 20 April 2022‎ RonelM talk contribs‎ 6,181 bytes +574‎ No edit summary undo Tag: Visual edit: Switched
• curprev 15:3015:30, 20 April 2022‎ RonelM talk contribs‎ 5,607 bytes +30‎ No edit summary undo
• curprev 10:4610:46, 20 April 2022‎ 84.110.59.162 talk‎ 5,577 bytes +49‎ No edit summary undo

• curprev 10:4510:45, 20 April 2022‎ 84.110.59.162 talk‎ 5,528 bytes +5,528‎ Created page with "== אנרגיה == === משפט פוינטינג === בוואקום ראינו את משפט פוינטינג:<math display="block">-\nabla\cdot(\vec E \times \vec H) = \frac{\partial}{\partial t}\underbrace{(\frac{\epsilon_0}{2}|\vec E|^2+\frac{\mu_0}{2}|\vec H|^2)}_{\text{stored energy}} +\underbrace{\vec E \cdot \vec J}_{\text{conduction power} } </math>מה קורה בחומר?<math display="block">-\nabla\cdot(\vec E \times \vec H) = -(\nabla\times\vec E)\cdot\vec..."