Discord\( \pmb{F = k \frac{\vert q_1 \vert \vert q_2 \vert}{r^2}} \) - Coulomb's law
\( \pmb{E = \frac{F}{q}} \) - Electric field strength
\( \pmb{\phi = k \frac{W}{q}} \) - Electric potential
\( \pmb{C = \frac{q}{U}} \) - Capacitance
\( \pmb{W = \frac{CU^2}{2}} \) - Energy of a capacitor
\( \pmb{I = \frac{U}{R}} \) - Ohm's law
\( \pmb{I = \frac{q}{t}} \) - Electric current
\( \pmb{P = IU \text{ = } I^2R \text{ = } \frac{U^2}{R}} \) - Electric power
\( \pmb{R = \rho \frac{l}{S}} \) - Resistance of a conductor
\( \pmb{Q = I^2Rt} \) - Joule-Lenz law
\( \pmb{I = \frac{\epsilon}{R+r}} \) - Current in a complete circuit
\( \pmb{I = I_1 = I_2 = I_n} \) - Current in a series circuit
\( \pmb{U = U_1 + U_2 + \text{ ... } + U_n} \) - Voltage in a series circuit
\( \pmb{R_{total} = R_1 + R_2 + \text{ ... } + R_n} \) - Total resistance in a series circuit
\( \pmb{C_{total} = \frac{1}{\frac{1}{C_1} + \frac{1}{C_2} + ... + \frac{1}{C_n}}} \) - Total capacitance in a series circuit
\( \pmb{I = I_1 + I_2 + \text{ ... } + I_n} \) - Current in a parallel circuit
\( \pmb{U = U_1 = U_2 = U_n} \) - Voltage in a parallel circuit
\( \pmb{R_{total} = \frac{1}{\frac{1}{R_1} + \frac{1}{R_2} + \text{ ... } + \frac{1}{R_n}}} \) - Total resistance in a parallel circuit
\( \pmb{C_{total} = C_1 + C_2 + \text{ ... } + C_n} \) - Total capacitance in a parallel circuit
\( \pmb{I_{max} = \frac{I_0}{\sqrt{2}}} \) - Maximum current in alternating current
\( \pmb{U_{max} = \frac{U_0}{\sqrt{2}}} \) - Maximum voltage in alternating current
\( \pmb{i = I_{max} \sin(\omega t + \phi_0)} \) - Current in alternating current
\( \pmb{u = U_{max} \sin(\omega t + \phi_0)} \) - Voltage in alternating current
\( \pmb{k = \frac{N_1}{N_2} = \frac{U_1}{U_2}} \) - Transformation ratio
\( \pmb{F_L = qvB \sin(\alpha)} \) - Lorentz force
\( \pmb{F_A = BIl\sin(\alpha)} \) - Ampere force
\( \pmb{\Phi = B S \cos(\alpha)} \) - Magnetic flux
\( \pmb{B = \frac{\mu_0 I}{2\pi r}} \) - Magnetic field due to a long straight conductor
\( \pmb{\epsilon = - \frac{\Delta\Phi}{\Delta t}} \) - EMF in a moving conductor
\( \pmb{L = \frac{\Phi}{I}} \) - Inductance
\( \pmb{W = \frac{LI^2}{2}} \) - EMF of self-induction
\( \pmb{T = 2\pi\sqrt{LC}} \) - Thomson's formula
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