Electromagnetism
117 flashcards by MentisLibrary
The core formulas of electromagnetism with their variables and units: Coulomb's and Gauss's laws, potential, capacitance and dielectrics, DC circuits, magnetic forces and fields, induction, Maxwell's equations, AC circuits and EM waves, for calculus-based physics students.
- What is Coulomb's Law?
- F = kq₁q₂/r²
- What is the value of Coulomb's constant?
- k = 8.99 × 10⁹ N·m²/C²
- What is the permittivity of free space?
- ε₀ = 8.85 × 10⁻¹² C²/(N·m²)
- What is the electric field?
- E = F/q
- What is the electric field of point charge?
- E = kq/r²
- What is the electric potential?
- V = U/q = kq/r
- What is the relationship between field and potential?
- E = -∇V
- What is electric potential energy?
- U = kq₁q₂/r
- What is Gauss's Law?
- ∮E·dA = Qenc/ε₀
- What is electric flux?
- ΦE = ∮E·dA
- What is the electric field inside a conductor?
- E = 0
- What is the electric field of infinite plane?
- E = σ/(2ε₀)
- What is the electric field between parallel plates?
- E = σ/ε₀
- What is capacitance?
- C = Q/V
- What is the capacitance of parallel plates?
- C = ε₀A/d
- What is the energy stored in capacitor?
- U = ½CV² = ½Q²/C = ½QV
- What is the energy density in electric field?
- u = ½ε₀E²
- What is a dielectric?
- Insulating material between capacitor plates
- What is the dielectric constant?
- κ = C/C₀
- What is electric current?
- I = dQ/dt
- What is current density?
- J = I/A
- What is drift velocity?
- vd = I/(nAq)
- What is Ohm's Law?
- V = IR
- What is resistance?
- R = ρL/A
- What is resistivity?
- ρ = E/J
- What is conductivity?
- σ = 1/ρ
- What is power dissipated in resistor?
- P = IV = I²R = V²/R
- What is Kirchhoff's current law?
- ΣI_in = ΣI_out
- What is Kirchhoff's voltage law?
- ΣV = 0 around closed loop
- What is the equivalent resistance of series resistors?
- Req = R₁ + R₂ + R₃ + ...