Physics E&M Formulas and Notes

Fg =. GmM/R²

Newton’s ULA

T² = (4pi²/GM)R³

Kepler’s 3rd Law (Do N2L, the NULA< the K3L) (derive using acp and T=2piR/v)

Friction

Charging an object which results in attraction (rub with fur or a plastic wrap)

Contact

Charging an object which results in repulsion (touching plastic with a metal ball)

Polarization

Induced charge with no real transfer (water and balloon)

inside

on conductors draw the change _____

Van de graaf generator

electrons get stuck on the rubber belt and then in the metallic dome

Fe = KQq/R²

Coulomb’s Law (k= 9×10^9 Nm²/C²)

Use Fx and Fy

When resolving a vector … (for E, for Fe, for Fg etc.)

Fe = qE

Use this formula for electric field, probably set equal to F = ma

F, a, v0, deltaS

When creating a trajectory plan for the particle in a capacitor, create an x/y table with ____

Thermionic emission

how does an oscilloscope transfer electrons from the negative cation to the positive anion?

cation

negative first plate in the capacitor

R = deltaV/I

Ohm’s Law

P (W) = deltaV *I

Power formula

R = roL/A

resistance formula based on wire material

R = R0(1 + alphadeltaT)

resistance formula based on temperature

Fmag = BILsintheta

Magnetic force RHR

fl = gvBsintheta

force laurence RHR (or LHR of negative)

repel

opposite direction CCW

attract

same direction CCW

F = -KdeltaX

SHM restoring force (Hooke’s Law) **Sometimes negative is already taken into account by the graph!!!)

deltaV = -EdeltaS

taking negative into account with electric field strength at different points (space and delta V = r of surrounding field lines)