physics test 2 - Name of quantity symbol used Magnetic pole...

Name of
quantity, &
symbol
used
What it
measures
units Something we saw or
read about that serves
as a quantitative
example of this
An equation that
involves this
An alternate set
of units
Magnetic
pole, p
strength of a
magnet
Amps
times
meters
0.1 Amp*meters is
typical of electro-
magnets we built; bar
magnets might be 10
Amp*meters or more
F = pB (C/s)* meter
Magnetic
field, B
How space is
changed by
the presence
of a magnet
Tesla Earth’s magnetic field
is about 0.00005 Tesla
= 5E-5 Tesla
U = B
2
*v/(8pk
m
); U
is energy of B-field ,
v is Volume
Tesla = N/
(Amp*meter)
Magnetic
constant, k
m
How strong
the magnetic
force is vs.
gravity and
electricity
N/Amp 2 k
m
=1x10 -7 N/Amp 2 ; text
defines “mu-naught” =
m
0
= 4pk
m
F
mag
= k
m
*p
1
*p
2
/r 2 N*sec 2 /C 2
Power, P Energy
consumed per
second
Watts Light bulb 60 Watts, or
typical horse can do
about 746 Watts
P=IV Joule/second
Current, I Charge per
second going
past a point
Amps Typical household
objects use about 1
Amp
I=V/R Coulomb per
second
Resistance,
R
How much an
object resists