P2.1 Static and current electricity

Question 1

What is static electricity?

Answer 1

Electrical charge built up on insulating materials

Question 2

What is another name for electrical charge?

Answer 2

Electrostatic charge

Question 3

What is the charge of a proton?

Answer 3

+1

Question 4

What is the charge of an electron?

Answer 4

-1

Question 5

What particles does the nucleus of an atom contain?

Answer 5

Protons and neutrons

Question 6

Why can’t protons be transferred when two insulating materials are rubbed together?

Answer 6

Protons are fixed in the nuclei of atoms

Question 7

Which material gains electrons when you rub an acetate rod and a cloth together?

Answer 7

The cloth

Question 8

Which material gains electrons when you rub a polythene rod and a cloth together?

Answer 8

The polythene rod

Question 9

What happens when the charges of two objects are the same?

Answer 9

They repel each other

Question 10

What happens if the charges of two objects are different?

Answer 10

They attract each other

Question 11

What is induction?

Answer 11

When an object is charged by another charged object placed close to it

Question 12

What is induced charge?

Answer 12

An electrostatic charge caused by another charged object being brought near

Question 13

What does it mean when an object is discharged?

Answer 13

It no longer has a charge

Question 14

What is the process of earthing?

Answer 14

Connecting something to earth so than an electrostatic charge can flow away

Question 15

When can static electricity on everyday objects be dangerous?

Answer 15

When it can cause a spark as this could create fires

Question 16

How can you prevent sparks being created from static electricity built up on objects?

Answer 16

You can make a conducting path to discharge the static electricity

Question 17

What is a bonding line?

Answer 17

A metal wire used to connect aircraft to earth before it’s refuelled

Question 18

What are some uses of static electricity?

Answer 18

Insecticide sprayers and electrostatic spray painting

Question 19

Why does static electricity build up on insulating materials?

Answer 19

Any charge transferred to the material isn’t conducted away

Question 20

Why can’t insulating materials conduct away electricity?

Answer 20

The electrons in insulating materials cannot move around

Question 21

What type of current do cells and batteries supply?

Answer 21

Direct current

Question 22

What is direct current?

Answer 22

A current that only flows in one direction

Question 23

What is a current?

Answer 23

The rate of flow of charged particles

Question 24

What type of current do generators produce?

Answer 24

Alternating current

Question 25

What is an alternating current?

Answer 25

A current in which the electrons change direction many times each second

Question 26

What does the size of a current depend on?

Answer 26

How much charge is passing through a point in the circuit each second

Question 27

What is charge measured in?

Answer 27

Coulombs (C)

Question 28

What is current measured in?

Answer 28

Amperes (amps, A)

Question 29

What does Q = I x t stand for?

Answer 29

Charge = current x time

Question 30

What is the relative mass of an electron in comparison to a proton?

Answer 30

0.0005

Question 30

What is the charge of a neutron?

Answer 30

0

Question 30

How do you create static electricity?

Answer 30

You rub two insulating materials together