FORMULA SHEET
PHY 1940 UNIVERSITY PHYSICS FINAL EXAM
Constants
Speed of light in vacuum
8
100.3 c
m/s
Charge of a proton
19
1060.1
e
C
Mass of a proton
27
1067.1
e
m
kg
Free space permittivity
12
0
1085.8
C2/N-m2
Coulomb’s constant
9
0
100.9
4
1
e
k
N-m2/C2
Free space permeability
7
0
104
T/m-A
Prefixes for units and equivalent order of magnitude.
m (mili) ~ 10-3;
(micro) ~ 10-6; n (nano) ~ 10-9; p (pico) ~ 10-12
Unit Conversion
1 cm = 0.01 m
Formulas
Area of a circle
2
rA
Kinetic energy
2
2
1mvK
Newton’s second law F = ma
Electric force in an electric field F = qE
The electric field associated with a point charge
rE
2
r
q
k
e
Gauss’s law
0
encl
Q
d
AE
Electrical potential of a point charge
r
q
kV
e
Potential energy of a charge q in an electrical potential V
qVU
Charge storage on a capacitor
CVQ
Capacitance calculation
d
AK
C
0
Equivalent capacitor for series connection
...
111
21
CCC
Equivalent capacitor for parallel connection
...
21
CCC
Ohm’s law
IRV
Resistance calculation
ALR /
