8/9/2019 Electricity and Magnetism Formula Sheet & study
guide Physics A
1/2
FORAPARTICULARMETAL
INDUCTION
= . oloumbs (c) = .
= .
= = qE= force between the 2 objects
= constant= & =charge of object 1 & 2 (C)
= Electric Field Strength
orce per coloumb exerted on a test charge at that
point
= = = = = =
= electric field strength (/)()( ) the same direction as Fe if Q
is positiveElectric Potential near point charge Q
= = tential V of surface of a sphere V =
kQ
r
ELECTRIC POTENTIAL DIFFERENCE
Work (Joules) needed to move charge between 2 points
= = oulesoloumb = = = = =
= = = =
Parallel oppositely charged plates UNIFORM
= = = =
= = = = =
= = = + = = +
= = = MILIKANS LAW (in suspension)
= = = =
ELECTRON GUN
= =
= = = = = = =
= = = = Electric current ()(rate of flow of charges with
time)
R= Resistance of wire (Ohms)()=(Volt/amp)
Dependant on temperature T R = voltage the force moving e () (/)
= e drift velocity ( ) =
R L R LA
= = Resistivity of wire (/)
= Length of wire = cross sectional area =
=
-I|I|+ CONVENTIONAL CURRENT pos n
= +
= 1 +2 +3 +4. .
1 =
11 +12 +
13 +. .
+ + = = + +
Lower Resistance = Thicker Filament
() = nergy() = = =
=
= = = = = = = = = = = = =
= = = = = = = = =
= = = = = =
=
RS = Shunt resistor (
IS Rs = IM RM
= + RS =
IM RM
ItotIM
Rs = series resistor ( ) = ( + )
CoulombsLaw
Electrons
OhmsLaw
8/9/2019 Electricity and Magnetism Formula Sheet & study
guide Physics A
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A B
=
= current in each wire
= Length of each wire = distance separating the wires
= 2 107A-Attractive force B-Repulsive force
(
)
/
= electric current in wire
distance from the wire
= 2 1 07= magnitude of magetic field strength
= radius of loop
for current in a (UNIFORM) =
= Length of solenoid
= number of turns or loops
= magnetic field strength
Length of conductor within the magnetic field
angle between the conductor and magnetic field
= v = u + at
=+ =
CURRENT CARRYING WIRE IN A MAGNETIC FIELD
=
= current () = magnetic field strength
= Length of conductor within the magnetic field
= angle between the conductor and magnetic fieldMOVING CHARGES
IN MAGNETIC FIELDS
= = = = =
Mark Riley
[email protected]
ELECTROMAGNETIC INDUCTION
Potential difference () ()induced across a conductor in or
moving thru
magnetic field B
= = = W = p. d. q = EMF q
= = = V = EL or E = V
L
VL
= vB so V = EMF = vLB
= = Mass Spectrometer
=
The Centripetal force is provided by thmagnetic force = = &
= =
=
BCOME(+)
Low Affinity for
Rabbit cat fur
Acetate
Perspex
Glass
Wool
Lead
Silk
Paraffin wax
Polythene
Ebonite
Copper
Rubber
Amber
Sulfur
Gold
BCOME(-)
High Affinity for
TriboelectricSeries
