Electric Fields & Forces

Physics II

What are the two types of charges?

Negative and positive (Ben Franklin)

What happens in the Charge Force Law?

Like charges repel & unlike attract

What are the basic carriers of charge?

Protons are positive

Electrons are negative

What is the conservation of charge?

Charge is neither created nor destroyed. It is transferred from one object to another

What is the Quantization of charge?

Ǝ a smallest amount of charge. All other charge is an integer multiple of this smallest amount

q=ne

What do all the components in q=ne mean?

q= amount of charge

n= integer

e= smallest amount (1.60 × 10^-19)

Charging by rubbing is called?

Charging by friction

What is a conductor?

Materials in which the charge is free to move (most metals, ionic liquids)

What is an insulator?

Materials in which charge is not free to move (rubber, plastics, etc)

What is grounding?

Removing any excess charge from an object (typically by conducting it to Earth

Here, touching an object will ground it

What is charging by conduction?

Transferring charge from one object to another by direct contact

What is polarization?

Charge in the sphere is polarized. Still neutral, but some (-) is repelled to the far side, leaving the near side positive

Polarization can occur in insulators such as:

Comb & paper

Balloon sticking to wall