Electricity & Magnetism Flashcards
1
Q
what is the Lorentz force equation
A
F = q(E + vxB)
2
Q
what are the four maxwell equations
A
∇E = ρ/ε
∇B = 0
∇xE = -dB/dt
∇xB - μεdE/dt = μj
3
Q
what are the two subsidiary field equations
A
D = ε0εE B = μ0(H+M)
4
Q
what is the Ohms Law equation
A
j = σE
5
Q
what are the 3 integral forms of Maxwell equations
A
Gauss ∫EdS = Q/ε
Faraday εmf = -dΦ/dt = -d/dt[∫BdS]
Ampere ∫H*dl = I
6
Q
what are the potential difference equations for a resistor, capacitor and inductor
A
V = IR V = Q/C V = L dI/dt
7
Q
what are the 3 impedance equations
A
Zr = R Zl = iωL Zc = 1/iωC
8
Q
how does impedance sum for a series and for a parallel circuit
A
sum of impedances in series
sum of reciprocal of impedances in parallel
9
Q
what is the circuit resonant frequency equation
A
ω^2 = 1/LC
