electricity

Question 1

what is static electricity

Answer 1

the buildup of an electric charge on the surface of an object

Question 2

charging by conduction

Answer 2

2 objects have a different charge

Question 3

charging by friction

Answer 3

2 objects are neutral

Question 4

charging by induction

Answer 4

temporary: holding a charged object close to a neutral object creates an induced charge on the neutral object ( only temporary because it only lasts while the charged object is held close by)

Question 5

what is the difference between a temporary and permanent charge

Answer 5

a temporary induced charge is where a charged object is brought close to ( but not touching) a neutral object but a permanent induced charge needs the neutral object to be grounded as well

Question 6

what are the 3 laws of electric charges

Answer 6

1. objects with the same charge repel each other
2. object with opposite charges will attract each other
3. charged objects attract neutral objects

Question 7

how to charge an object using friction

Answer 7

rubbing one object together with another object will cause the electrons to transfer to another material

Question 8

what does net charge mean

Answer 8

overall charge of the atom

Question 9

what does grounding mean

Answer 9

connecting an object to the earths surface using a conductor

Question 10

what does discharging ( water vapour) mean

Answer 10

moisture in the air can act as a pathway for electrons, humid air draws more electrons than dry air

Question 11

how to create lighting by induction

Answer 11

• friction: water drops in the cloud move past one another, creating friction and the water becomes charged ( + or -). negative water molecules collect at the bottom of the cloud.
• temporary charge separation in the ground: the cloud repels the electrons at the earths surface, inducing the electrons in the earth to move away from the surface. the earth has a temporary charge separation.
• movement of electrons from cloud to ground: the excess electrons take the path with least resistance to discharge from the cloud to the ground. they jump between water droplets
• permanent induced charge: the cloud discharges electrons to create a spark called lighting and a rumbling sound of thunder