RAD 262 Ch. 5

what is electrostatics?

study of static electricity or stationary electric charges

what is electrification?

causing something to be charged

what is electrification by friction?

two objects of different materials together, ends up with two opposite charges

describe electrification by contact:

one object is neutral, one is charged, these touch and the electrons move from one to another, neutral object will acquire the charge it is touched with

how does an electron move?

from higher negatively to lower negatively

describe electrification by induction:

two objects are not touching, neutral body must be grounded to hold a charge

what is a non-conductor/insulator:

does not allow electrons to freely flow (ex. plastic, hard rubber, glass)

what is a conductor?

allow free flow of electrons/conduct current (ex. silver, copper, aluminum)

what is a semi-conductor?

intermediate, some conditions allow free flow, some do not (ex. silicon)

opposites _____, like ______

attract, repel

what is the rule for grounding?

always ground the distal end, you will end up with opposite charge of what you charged the body with

how do electrons move from a positive distal end - the ground?

electrons move from the ground to the positively charged distal end

how do electrons move from a negative distal end - the ground?

electrons move from the negative distal end to the ground

what is coulombs law?

a force between two unlike charges is directionally proportional to the product of their quantities, and inversely proportional to the square of the distance between them

if one charge is doubled, what happens to the force of attraction?

the force of the attraction is doubled

if the distance is doubled, what happens to the force of attraction?

the force is ¼ as great

where do charges reside?

on the external surface

on a curved surface, where is the charge the greatest?

the highest curvature

which types of charges move?

negative