Electricity And Magnetism

Front 1

Electric Current

Back 1

I= q/t
I- current
q- quantity of charge
t- time

Front 2

Coulomb's law of electrostatics

Back 2

F= k(q1*q2/d^2)
F- force between two charges
k- proportionality constant
(1.3806503x10^-23 m^2 kg s^-2 K^-1)
q1*q2- Product of charges
d- distance separating charges

Front 3

Capacitance of a capacitor

Back 3

C=q/v
C- Capacitance of a capacitor
v- potential difference between plates
q- charge on either plate

Front 4

Ohm's law of resistance

Back 4

E= I*R
E- emf of source
I- current in the circuit
R- resistance of the circuit

Front 5

Joule's law

Back 5

Q=I^2*R*t
Q- heat energy
I- current
R- resistance
t- time

Front 6

Faraday's Law of electrolysis

Back 6

m=z*I*t
m- mass
z- electrochemical equivalent
I- current
t- time

Front 7

Induced emf: Coil in a Magnetic Field

Back 7

E=-N(dɸ/dt)
E- induced emf
N- number of turns
dɸ/dt- the change in flux linkage in a given interval of time

Front 8

Induced emf: conductor in a magnetic field

Back 8

E= B*l*v
E- induced emf
B- flux density of the magnetic field
l- length of conductor
v- velocity of conductor across magnetic field

Front 9

Instantaneous Voltage

Back 9

e=E(max)sinƟ
e- instantaneous voltage
E(max)- maximum voltage
Ɵ- angle between the plane of the conducting loop and the perpendicular to the magnetic flux.

Front 10

Instantaneous current

Back 10

i=I(max)sinƟ
i- instantaneous current
I(max)- maximum current
Ɵ- displacement angle