F = ma

F = kq₁q₂/r²

k = 1/4pe₀

E = F/q_o

E = kq/r² (point charge)

W_AB = EPE_A – EPE_B

V = EPE/q_o

V_B – V_A = -W_AB/q_o

V = kq/r (point charge)

q = CV

Energy = ½ qV = ½ CV² = q²/2C

Energy density =1/2Î_oE²

C_P = C₁ + C₂ + ...

1/C_s = 1/C₁ + 1/C₂ + ...

I = Dq/Dt

V = IR (Resistor)

R = rL/A (Resistance)

P = IV (Power)

R_S = R₁ + R₂ + ...

1/R_P = 1/R₁ + 1/R₂ + ...

q = q_o[1-e^-t/RC] (Charging)

q = q_oe^-t/RC (Discharging)

F = q_ovBsinq (force on moving charge)

F = ILBsinq (force on wire)

t = NIAB sinf (torque on loop)

B = m_oI/2pr (wire)

B = Nm_oI/2R (loop)

B = m_onI (solenoid)

F = BA cosf (flux)

E = -NDF/Dt (Induced emf)

w = 2pf

Energy = ½ LI² (Inductor)

Energy density = 1/(2m_o) B²

r = mv/qB (radius of particle in Bfield)

V_s/V_p = N_s/N_p = I_p/I_s (Transformer)

RHR1

Thumb: Velocity/Current
Fingers: B field
Palm: Force

RHR2

Thumb: Current
Fingers: Location you want B field
Palm: Direction of B field

Constants

k = 8.99x10⁹ Nm²/C²

e₀ = 8.85x10^-12 C²/Nm²

e = 1.60x10^-19 C

m_o = 4p x10^-7 Tm/A

c = 3x10⁸ m/s