Electricity

Question 1

Conductor

Answer 1

An object that is easy for electrons to flow through

Question 2

Insulator

Answer 2

An object that is not easy for electrons to flow through

Question 3

Negative lightning

Answer 3

-When hot and cold air masses collide, electrons move down and protons remain at the top of the cloud
-Causes induced charge separation of the ground as the electrons move deeper into the earth and the top of the earth is positive
-When the charge difference builds up too much, electrical discharge will occur and the electrons in the cloud will jump to the earth which absorbs excess charge

Question 4

Charging by induction

Answer 4

-May be temporary or permanent
-Start with a neutral object and a charged object (Can be positive or negative)
-No direct contact is made
-The neutral object will gain the OPPOSITE charge of the charged object

Question 5

Charging by Conduction (Contact)

Answer 5

-Start with a neutral object and charged object (Can be positive or negative)
-There will be direct contact between the two objects
-The neutral object gains the SAME charge as the charged object

Question 6

Charging by friction

Answer 6

-Start with two neutral objects
-Rub the two objects together
-One object will become positive and the other will become negative when electrons move from one object to another

Question 7

Grounding

Answer 7

Attaching an object to something much larger than itself that is capable of supplying or removing electrons (Neutralizing it)

Question 8

Electrostatic duster

Answer 8

-Depends on charging by friction to attract dust
-Sweeping the duster across an object causes build up of charge
-Dust is attracted to the duster and jumps to the surface of the duster

Question 9

Electrostatic precipitator

Answer 9

-A device that removes air dust from air by using the properties of electrostatic charge
-Smoke charges through negatively charged plates
-Smoke becomes negatively charged by conduction
-Smoke passes through positively charged plates
-Negatively charged smoke is attracted to the positive plates (Sticks to it)
-Falls onto collection plate

Question 10

Laser printer

Answer 10

-Consists of drum made of positively charged photoconductor (Only conducts electricity when light shines on it)
-The light is a laser that draws images with negative charges on the positive drum
-The drum rolls across positively charged toner that is attracted to the negative image
-Drum rolls over papers that are negatively charged (high charge). positive toner sticks to the paper
-Fuser melts the toner onto the paper

Question 11

Electrostatic paint sprayer

Answer 11

-Paint travels through the sprayer, being charged by friction, gaining a charge opposite of the object being sprayed
-Paint is attracted to the object making process less wasteful

Question 12

Lightning rods

Answer 12

-Lightning rod is a metal (Typically Cu or Fe with a wire in it) so it conducts electricity away from the house
-Rod is connected to the ground to absorb excess charge
-Rod is pointed to conduct/attract the charge/lightning towards the ground

Question 13

Laws of electric charge

Answer 13

-Opposites attract
-Like charges repel
-Charged objects attract neutral objects

Question 14

Static electricity

Answer 14

When electrons move, but are bound to a certain area

Question 15

Electrical discharge

Answer 15

A build up of too many electrons, causing them to jump from one object to another

Question 16

Induced charge separation

Answer 16

A shift in the position of electrons in a neutral object that occurs when a charged object is brought near it