Advanced level formulae – shortened version

This is a shortened list of formulae that you might need for the first year of your advanced Physics course. For a fuller list please use the Formulae list.

Quantity	Formula
Acceleration	Acceleration = change of speed/Time taken = Δv/Δt
de Broglie equation	Wavelength of a particle (λ) = h/mv
Density	Density (ρ) = mass/volume
Double slit interference	Wavelength (λ) = slit separation (a) x fringe width 9x)/D
Electric current	Current (I) = charge/time = ΔQ/Δt
Electrical energy	Energy = VIt
Electrical resistance	R = voltage/current = V/I
Force (F)	F = mass (m) x acceleration (a)
Force on a current in a magnetic field	F = BIL sinθ
Gravitational potential energy	Gravitational potential energy = mgh
Kinetic energy	Kinetic energy = 1/2 mv2
Moment of a force	Moment = Force x distance of line of action of force from pivot
Momentum	Momentum = mass x velocity
Photoelectric effect	hf = Φ + 1/2 mv2
Photon energy	Energy (E) = Planck's constant (h) x Frequency (f)
Potential difference	V = W/Q = energy/charge = power/current
Power	Power = work done/time taken
Power (electrical)	Power = VI = I2R = V2/R
Pressure	P = Force/area
Refractive index	Refractive index = sin i/sin r = ci/cr
Resistivity	Resistivity (ρ) = RA/L
Resistors in parallel	1/R = 1/R1 + 1/R2
Resistors in series	R = R1 + R2
Speed	Speed = distance travelled/time taken
Strain	Strain (ε) = extension/original length
Stress	Stress (σ) = force/area
Torque of a couple	Torque = force (one) x distance between forces
Uniformly accelerated motion	s = ut + 1/2 at2     v2 = u2 + 2as
Wave speed	Wave speed = frequency (f) x wavelength (λ)
Weight	Weight = mg
Work done	Work = force x distance
Young modulus	E = longitudinal stress/longitudinal strain = FL/eA