Electrostatics Review

What is the charge of one electron?

Answer: -1.6E-19 C

\ Coulomb’s law says that the force between any two charges depends on what?

Answer: The sizes of the charges and inversely on the square of the distance between the charges F = kqq/d2

Two charges are separated by a certain distance Two charges are separated by a certain distance. If the magnitude of each charge is doubled, the force on each charge is…..

Answer: quadrupled

When the distance between two charges is halved, the electrical force between the charges….

Answer: Quadruples

What does electrical forces have that gravitational forces do not?

Answer: Repulsive interactions

What are charges doing in a conductor and insulator?

Answer: Conductor – Moving freely Insulator – Not moving at all

What are semiconductors?

Answer: Can be insulators Can be conductors Have impurities to change their electrical properties

How do you charge by induction?

Answer: Have a charged rod opposite the charge you want the object to be-bring it close to the object. Ground the object The object is now charged

A charged balloon will stick to a neutral wall, which demonstrates charge….

Answer: Polarization

Two charged particles held close to each other are released Two charged particles held close to each other are released. As the particles move, the velocity of each increases. Therefore, the particles have what kind of charges?

Answer: Can not determine them

If the acceleration between two charged particles decreases, the particles have what kind of charges?

Answer: The same

When comparing gravitational fields with electric fields, the magnitude of g is most like what in the electrical field?

Answer: The strength of the electric field

What will happen to the electrical potential energy of a charged particle in an electric field when the particle is released?

Answer: Energy is transformed into KE

When work is done to move two like charges close together, that work is the what in the system?

Answer: Electric Potential