STATIC ELECTRICITY TEST

Conduction ( rubber rod )

Negatively charged, escope takes electrons

Conduction ( glass rod )

Positive, glass rod takes the electrons

Induction ( rubber rod )

Positive, finger and rod takes escope’s electrons

Induction ( glass rod )

Negative, electrons transfer to the escope

Coulomb’s Law

Fe= ( k•q1•q2 ) / r²

Point charge creating e-field equation

E = ( k•q ) / r²

“How fast it’s going” equation

KE = ( 1/2mv² ) / q

Work

Equals energy, equals KE or PE

Force on a charge IN an E-field equation

E = Fe / q

Charge values are always…

Coulombs

If charge values are expressed as e- in a problem…You do what?

Convert the e- to Coulombs

Electrical potential difference

Voltage

Work =

PE = PE+KE = KE

Induction

Positive: Rubber. Negative: Glass.

Conduction

Positive: glass. Negative: rubber.