PHY1020U
Formulas and Equations Midterm 2
NOTE that there are some basic laws, definitions and formulas that you are
expected to remember.
Like Kirchoff’s Laws and equivalent resistance.
μ
0
= 4
π
x 10
7
T m/A
magnetic constant
2
2
9
/
10
99
.
8
C
m
N
k
e
⋅
×
=
Coulomb Constant (SI Units)
0
4
1
πε
=
e
k
e = 1.60x10
19
C
electron charge
m
e
= 9.11x10
31
kg
mass of an electron
A = 4
π
r
2
surface area of a sphere
V = 4/3
π
r
3
volume of a sphere
C = 2
π
r
circumference of a circle
A = 2
π
r
l
surface area of a cylinder
V =
π
r
2
l
volume of a cylinder
V = I R
O
h
m
’
s
L
a
w
A
I
J
/
=
C
u
r
r
e
n
t
d
e
n
s
i
t
y
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 Spring '09
 Rupinder
 Physics, Resistance, Magnetic Force, Magnetic Field, Coulomb Constant, Magnetic force law

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