Electricity
E= P x T
Electrical Energy(J)= Power(w) x time(s)
Q= I x T
Charge= Current x time
E = W/Q
Electromotive force(V)= Energy Supplied to the charge of the power source (J) / charge on
each carrier (C)
V=W/Q
Potential difference (V) = Energy transfer to the components from the charge carrier(J) /
Charge on each carrier (C)
Ohms Law: R=V/I
Resistance (Ω) = voltage (v) /current (A)
R = K x L (length)
Resistance is directly proportional to length.
R = K/A
Resistance is inversely proportional to the cross section area.
Series:
Resistance (total)= R1+R2+R3…
Current (total)= I1=I2=I3…
Parallel:
1/resistance(total)= 1/R1+1/R2+1/R3…
Current total= I1+I2+I3…
Voltage total= V1+V2+V3…
Wave
F=1/T
Frequency (hz)= 1/period(s)
V=λ x f
V=Wave speed (m/s)
λ=Wavelength(m)
f= frequency (hz)
Wave speed(m/s)=Wavelength(m) x Frequency(hz)
n= C/V
Refractive index = Speed of light in Vacuum (3x10^8m/s) / Speed of light in medium
n= sin i/sin r
refractive index= incident angle/refractive angle