static electricity

What is static electricity?

imbalance of electrical charges within or on surface materials

what is an ION

charged particle

what gives something a positive charge

lack of electrons

what gives something a negative charge

too many electrons

what is the electron affinity table

table that shows different materials that have a tendency to lose or gain electrons

what causes clothes to stick together

charges that have not equalized

why don't charges equalize well in the winter vs summer

everything is dry and wont equalize well

What is selenium?

element, that gets a positive charge when introduced to light

how does a photo eye work

emitting a beam of light and then detecting if that light is interrupted by an object

describe how a laser printer

roller covered in selenium, as it rotates the negative charged ink

describe how a lightning strike develops

when the negative charges (electrons) in the bottom of the cloud are attracted to the positive charges (protons) in the ground.

what is cathodic protection

lightning protection, releases the charge early before the lightning strikes

what is no contact charging

polarization

what is conduction (charging)

charging by touching

what is induction (charging)

charging w/out touching

what is charging through friction

rubbing

how does a solar panel work

use photovoltaic cells to convert sun light into electricity

describe how an electrostatic filter work

use static electricity to trap particles in the air

describe the process of electrostatic painting

where it is sprayed with, or dipped into, electrostatically charged paint particles and then placed into the oven

what is a reference (for circuit)

part of the circuit that does not charge

how do you find total resistance in a series circuit

Rt = R1+R2+R3

how do you find total voltage in a series circuit

add up the individual voltage drops across each component in the circuit

how do you find the total current in a series circuit

I=V/R

what is a watt (power)

unit of power that measures how quickly energy is used or produced

how many watts in a 1 horsepower

746 watts

what happens when 2 power supplies are placed together in a series circuit one in front of the other + to - and + to -

the combined output voltage of both power supplies is added together

what happens when 2 power supplies are placed together in a series circuit one in front of the other negative to positive and positive to negative

the voltages subtract from each other