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Electricity and Magnetism Equations
Straight from the AP reference table
19
Physics
12th Grade
04/24/2013
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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/V
C = (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 = qvBsin
F = 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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