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Solihull School - Shells > Electricity and Magnetism FULL > Flashcards

Electricity and Magnetism FULL Flashcards

1
Q

What two types of electric charge are there?

A

Positive and negative

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2
Q

Which particle carries negative charge?

A

Electrons

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3
Q

Which particle carries positive charge?

A

Protons

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4
Q

Which particle has no charge?

A

Neutrons

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5
Q

What happens when similar charges are near each other?

A

They repel

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6
Q

What happens when opposite charges are near each other?

A

The attract

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7
Q

How would a neutral object become charged?

A

By rubbing two insulating materials together

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8
Q

Which particle always moves when objects are rubbed together?

A

Electrons

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9
Q

Which force is required to move electrons?

A

Friction

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10
Q

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

A

Insulating materials

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11
Q

How does lightning occur?

A

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

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12
Q

What is an electric field?

A

An area where an electric force acts on a charged object

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13
Q

Define current

A

The amount of charge flowing per second

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14
Q

What does a closed switch do?

A

It completes the circuit and allows current to flow

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15
Q

What does an open switch do?

A

It opens the circuit and does not allow current to flow

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16
Q

What instrument measures current?

A

An ammeter

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17
Q

What is the symbol for an ammeter?

A

A (in a circle)

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18
Q

What are the units of current?

A

A (Amps)

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19
Q

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

A

Series

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20
Q

Define potential difference

A

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

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21
Q

What instrument measure potential difference?

A

Voltmeter

22
Q

Do you connect a voltmeter in series or parallel?

A

Parallel

23
Q

What are the units for potential difference?

A

V (Volts)

24
Q

What is another term for the value of potential difference?

A

Rating

25
Q

What is a series circuit?

A

A circuit with one loop

26
Q

What is a parallel circuit?

A

A circuit with more than one loop

27
Q

What is an advantage of a parallel circuit?

A

If one component breaks, the others will still work

28
Q

In a series circuit the current is always

A

The same everywhere

29
Q

In a parallel circuit the current

A

Is split (I1 = I2 + I3)

30
Q

Is a series circuit the potential difference

A

Is shared (V1 = V2 + V3)

31
Q

In a parallel circuit the potential difference

A

Is the same across each junction

32
Q

What is resistance?

A

How difficult it is for current to flow through a material

33
Q

What is the unit of resistance?

A

Ohm

34
Q

What device can measure resistance?

A

Ohmmeter

35
Q

A material with a very high resistance is called an

A

Insulator

36
Q

A material with a very low resistance is called a

A

Conductor

37
Q

What is the equation to calculate resistance?

A

R = V / I

38
Q

What are the three magnetic materials

A

Iron, Nickel and Cobalt

39
Q

What are the two poles of a magnet

A

North and South

40
Q

What happens when similar poles are near each other

A

They repel

41
Q

What happens when opposite poles are near each other

A

They attract

42
Q

Which way do magnetic field lines go

A

From north to south

43
Q

What is created when a current flows through a wire

A

A magnetic field

44
Q

How can we increase the magnetic field produced by a wire

A

Coil the wire or put more current through it

45
Q

What do we call the magnet created by electricity?

A

Electromagnet

46
Q

How else can we increase the strength of an electromagnet

A

Wrap the wire around an iron core

47
Q

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

A

A permanent magnet

48
Q

How can you make an electric motor spin faster?

A

Increase the current, increase the number of coils

49
Q

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

A

Change the direction of current, swap the permanent magnet around

50
Q

What does repeatable mean?

A

When you repeat an experiment AND get similar results

51
Q

What does reproducible mean?

A

When someone else repeats an experiment AND gets similar results

Solihull School - Shells (7 decks)

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