Electricity and Magnetism FULL

Question 1

What two types of electric charge are there?

Answer 1

Positive and negative

Question 2

Which particle carries negative charge?

Answer 2

Electrons

Question 3

Which particle carries positive charge?

Answer 3

Protons

Question 4

Which particle has no charge?

Answer 4

Neutrons

Question 5

What happens when similar charges are near each other?

Answer 5

They repel

Question 6

What happens when opposite charges are near each other?

Answer 6

The attract

Question 7

How would a neutral object become charged?

Answer 7

By rubbing two insulating materials together

Question 8

Which particle always moves when objects are rubbed together?

Answer 8

Electrons

Question 9

Which force is required to move electrons?

Answer 9

Friction

Question 10

What type of materials are needed for static charge to build up?

Answer 10

Insulating materials

Question 11

How does lightning occur?

Answer 11

Electrons jump from the cloud to the ground creating a large current. This is seen as lightning.

Question 12

What is an electric field?

Answer 12

An area where an electric force acts on a charged object

Question 13

Define current

Answer 13

The amount of charge flowing per second

Question 14

What does a closed switch do?

Answer 14

It completes the circuit and allows current to flow

Question 15

What does an open switch do?

Answer 15

It opens the circuit and does not allow current to flow

Question 16

What instrument measures current?

Answer 16

An ammeter

Question 17

What is the symbol for an ammeter?

Answer 17

A (in a circle)

Question 18

What are the units of current?

Answer 18

A (Amps)

Question 19

Do ammeters need to be connected in series or parallel for them to work?

Answer 19

Series

Question 20

Define potential difference

Answer 20

How much energy each charge as (it gives the electrons a push)

Question 21

What instrument measure potential difference?

Answer 21

Voltmeter

Question 22

Do you connect a voltmeter in series or parallel?

Answer 22

Parallel

Question 23

What are the units for potential difference?

Answer 23

V (Volts)

Question 24

What is another term for the value of potential difference?

Answer 24

Rating

Question 25

What is a series circuit?

Answer 25

A circuit with one loop

Question 26

What is a parallel circuit?

Answer 26

A circuit with more than one loop

Question 27

What is an advantage of a parallel circuit?

Answer 27

If one component breaks, the others will still work

Question 28

In a series circuit the current is always

Answer 28

The same everywhere

Question 29

In a parallel circuit the current

Answer 29

Is split (I1 = I2 + I3)

Question 30

Is a series circuit the potential difference

Answer 30

Is shared (V1 = V2 + V3)

Question 31

In a parallel circuit the potential difference

Answer 31

Is the same across each junction

Question 32

What is resistance?

Answer 32

How difficult it is for current to flow through a material

Question 33

What is the unit of resistance?

Answer 33

Ohm

Question 34

What device can measure resistance?

Answer 34

Ohmmeter

Question 35

A material with a very high resistance is called an

Answer 35

Insulator

Question 36

A material with a very low resistance is called a

Answer 36

Conductor

Question 37

What is the equation to calculate resistance?

Answer 37

R = V / I

Question 38

What are the three magnetic materials

Answer 38

Iron, Nickel and Cobalt

Question 39

What are the two poles of a magnet

Answer 39

North and South

Question 40

What happens when similar poles are near each other

Answer 40

They repel

Question 41

What happens when opposite poles are near each other

Answer 41

They attract

Question 42

Which way do magnetic field lines go

Answer 42

From north to south

Question 43

What is created when a current flows through a wire

Answer 43

A magnetic field

Question 44

How can we increase the magnetic field produced by a wire

Answer 44

Coil the wire or put more current through it

Question 45

What do we call the magnet created by electricity?

Answer 45

Electromagnet

Question 46

How else can we increase the strength of an electromagnet

Answer 46

Wrap the wire around an iron core

Question 47

A motor uses an electromagnet to turn, it also needs what other component

Answer 47

A permanent magnet

Question 48

How can you make an electric motor spin faster?

Answer 48

Increase the current, increase the number of coils

Question 49

How can you make an electric motor reverse it's direction?

Answer 49

Change the direction of current, swap the permanent magnet around

Question 50

What does repeatable mean?

Answer 50

When you repeat an experiment AND get similar results

Question 51

What does reproducible mean?

Answer 51

When someone else repeats an experiment AND gets similar results