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Electricity and Magnetism Equations
Straight from the AP reference table
19
Physics
04/24/2013

Term
 Force
Definition
 F = (kq1q2)/r^2
Term
 Electric field
Definition
 E = F/q
Term
 Electric Potential (Voltage)
Definition
 U(E) = qV = (kq1q2)/r
Term
 Average Electric field
Definition
 E(avg) = -V/d
Term
 Electric potential or Potential difference
Definition
 V = k[(q1/r1) + (q2/r2) + ...]V = Kq/r (must show how derived)V = IR
Term
 Capacitance
Definition
 C = Q/VC = (vacuum permittivity)A/d
Term
 Potential Energy Cpacitance
Definition
 U(c) = (1/2)QV = (1/2)CV^2
Term
 Average Current
Definition
 I(avg) = (/\Q)/(/\t)
Term
 Resistance
Definition
 R = p(resistivity) x l/A
Term
 Power
Definition
 P = IV
Term
 Capacitance in a parallel circuit
Definition
 C(p) = C1 + C2 + ...
Term
 Capacitance in a series circuit
Definition
 1/C(s) = 1/C1 + 1/C2 + ...
Term
 Resistance in a parallel circuit
Definition
 1/R(p) = 1/R1 + 1/R2+ ...
Term
 Resistance in a series circuit
Definition
 R(s) = R1 + R2 + ...
Term
 Force of magnetic Field
Definition
 F = qvBsinF = BIlsin
Term
 Magnetic field
Definition
 B = (vacuum permeability x I)/(2pi x r)
Term
 Magnetic flux
Definition
 = BAcos
Term
 emf average
Definition
 = change in magnetic flux over change in time
Term
 emf
Definition
 = Blv
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