Download
1 / 21
280 likes | 618 Views
Static Electricity. Methods of charging Electric force, Coulomb’s Law. Charging by Conduction. Charging by Induction. Charging by Induction. Charging by Friction. Electric Fields. Charged particles produce Other charged particles experience force in a field. Field Lines.
E N D
Static Electricity • Methods of charging • Electric force, Coulomb’s Law
Electric Fields • Charged particles produce • Other charged particles experience force in a field
Field Lines • Point direction a + charge would move • More lines = stronger field
Draw the fields… • 1 positive charge • 1 negative charge • 2 positive • 2 negative • 1 positive/1 negative
To calculate field strength: E = Fon q/q E = field strength F = force on test charge q = test charge
A new force… • Electric force • Between charged objects • Depends on distance, amt. of charge
Coulomb’s Law qAqB K F = d2 K = 9 x 109 N·m2/C2
Class Practice • Coulomb’s Law • Electric field, version 2
Measuring the E. Field Greater E Greater F Greater energy Less E Less F Less energy
Electrical PE • Compare to GPE • Depends on relative position in field • Work done to increase PE
High or Low? A B B A
Electric Potential Difference (voltage) • Electrical PE per charge • Units – volts (1 J/C) • Device - voltmeter
