Электродинамика №1 формула

$$F=BI∆l\sin a$$

$$Q=I^2R∆t$$

$$A=IU∆t$$

$$F=k\frac{q_1q_2}{R^2}$$

$$I=2\pi\cdot10^{-3}\cos\left(2\pi t+\frac{\pi}{3}\right)$$

$$I=2\pi\cdot10^{-3}\sin\left(2\pi t+\frac{\pi}{3}\right)$$

$$I=-2\pi\cdot10^{-3}\sin\left(2\pi t+\frac{\pi}{3}\right)$$

$$I=2\pi\cos\left(2\pi t+\frac{\pi}{3}\right)$$

$$R=R_o(1+αt)$$

$$R=\frac{\epsilon}{R}-r$$

$$R=\frac{U}{I}$$

$$R=\rho\frac{l}{S}$$

$$B=\frac{M}{I\Delta l}$$

$$B=\frac{I\Delta l}{F_{\max}}$$

$$B=\frac{F_{\max}}{I\Delta l}$$

$$B=\frac{F}{qv}$$

$$L=\frac{\pi\nu}{X_C}$$

$$L=\frac{X_C}{2\pi\nu}$$

$$L=\frac{X_C}{\nu}$$

$$L=\frac{X_C}{\pi\nu}$$

$$A=q\left(\phi_1-\phi_2\right)$$

$$A=q\left(\phi_2-\phi_1\right)$$

$$A=\frac{q}{\phi_1-\phi_2}$$

$$A=\frac{\phi_1-\phi_2}{q}$$

$$X_C\ne X_L;\ R=0$$

$$X_C=X_L;\ Z=0$$

$$R<<Z$$

$$X_C=X_L;\ R=Z$$

$$\nu=\frac{1}{2\pi\sqrt[]{2WC}}$$

$$\nu=\frac{1}{2\pi\sqrt[]{WC}}$$

$$\nu=\frac{I}{2\pi\sqrt[]{2WC}}$$

$$\nu=\frac{I}{2\pi\sqrt[]{WC}}$$

$$\eta=\frac{R}{R+r}$$

$$\eta=R\epsilon$$

$$\eta=\frac{\epsilon}{R+r}$$

$$\eta=\frac{\epsilon^2}{\left(R+r\right)^2}$$

$$W=mgh$$

$$W=\frac{q^2}{2C}$$

$$W=\frac{CU^2}{2}$$

$$W=\frac{LI^2}{2}$$