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Maths > 07/03/2024 THIS is FOR QUIZ on ELECTRICITY! > Flashcards

07/03/2024 THIS is FOR QUIZ on ELECTRICITY! Flashcards

1
Q

A plastic rod is rubbed on a duster and becomes positively charged. Are these statements true or false? The rod has gained protons

A

False

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2
Q

A plastic rod is rubbed on a duster and becomes positively charged. Are these statements true or false? The duster has gained electrons

A

True

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3
Q

A plastic rod is rubbed on a duster and becomes positively charged. Are these statements true or false? The duster has lost electrons

A

False

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4
Q

A plastic rod is rubbed on a duster and becomes positively charged. Are these statements true or false? The duster has become positively charged

A

False

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5
Q

A plastic rod is rubbed on a duster and becomes positively charged. Are these statements true or false? The rod has lost electrons

A

True

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6
Q

A plastic rod is rubbed on a duster and becomes positively charged. Are these statements true or false? The duster has become negatively charged

A

True

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7
Q

When does lightning occur?

A

Static charges in the clouds flow to other clouds or to the ground

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8
Q

A student takes of his nylon fleece and feels a small electric shock he realises that this happens because his fleece has become charged. Explain why the fleece becomes charged

A

The fleece becomes charged as the fleece is rubbed on the shirt when the student removes it

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9
Q

A student takes of his nylon fleece and feels a small electric shock he realises that this happens because his fleece has become charged. Are these statements true or false? Positively charged objects repel negatively charged objects

A

False

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10
Q

A student takes of his nylon fleece and feels a small electric shock he realises that this happens because his fleece has become charged. Are these statements true or false? Electrical charges move easily through metals

A

True

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11
Q

A student takes of his nylon fleece and feels a small electric shock he realises that this happens because his fleece has become charged. Are these statements true or false? Static electricity is safe and can never cause any danger

A

False

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12
Q

A student takes of his nylon fleece and feels a small electric shock he realises that this happens because his fleece has become charged. Are these statements true or false? An electric current is a flow of electrical charge

A

True

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13
Q

What is the structure of the atom?

A

Shell/energy level, electron, neutron, proton, nucleus

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14
Q

Fill in the gaps: Nucleus is centre of an atom. It contains ______ and ______

A

1st gap protons 2nd gap neutrons

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15
Q

Fill in the gaps: Electron moves in a ______ or energy level which surround the nucleus of an an atom

A

1st gap shell

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16
Q

Fill in the gaps: When two objects are ______ together they become charged by ______ or loosing electrons

A

1st gap rubbed 2nd gap gaining

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17
Q

Fill in the gaps: ______ causes ______________________ to move from one object to another

A

1st gap friction 2nd gap negatively charged electrons

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18
Q

Fill in the gaps: The object that gains electrons becomes ______ charged

A

1st gap negatively

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19
Q

The object that loses electrons becomes ______ charged

A

1st gap positively

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20
Q

What is the symbol for current?

A

I (CAPITAL)

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21
Q

What is the formula for current?

A

Amount of charge/time ( (/) means divided (in this case)

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22
Q

What is current?

A

An electrical current in a wire is a controlled flow of electrons.

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23
Q

What is the unit for current?

A

Amperes (A)

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24
Q

How do you draw a cell?

A

Straight line attached to a positive terminal then negative terminal attached to a straight line

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25
Q

What does a cell contain?

A

Positive and negative terminal

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26
Q

What do two cells create?

A

Battery

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27
Q

How do you draw a wire?

A

Straight line

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28
Q

How do you draw a battery?

A

Straight line attached to a positive terminal then a negative terminal then small straight line then small straight line Positive terminal attached to a negative terminal attached to a straight line

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29
Q

What does a battery contain?

A

Two cells

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30
Q

How do you draw a voltmeter?

A

Straight line attached to a circle with a V inside (CAPITAL) attached to a straight line

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31
Q

How do you draw a bulb?

A

Straight line attached to a circle with a X inside (CAPITAL) attached to a straight line

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32
Q

How do you draw a ammeter?

A

Straight line attached to a circle with a A inside (CAPITAL) attached to a straight line

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33
Q

How do you draw a open switch?

A

Straight line attached to a circle with a diagnol line then a circle attached to a straight line

34
Q

How do you draw a closed switch?

A

Straight line attached to a circle attached to a short line attached to a circle attached to a straight line

35
Q

How do you draw a resistor?

A

Straight line attached to a rectangle attached to a straight line

36
Q

What is a cells, batterys function?

A

Source of electrical energy

37
Q

What is a wires function?

A

Source of electrons that transfer energy

38
Q

What is a open switchs function?

A

Breaks the circuit

39
Q

What is a bulbs function?

A

Transfer electrical energy to light energy

40
Q

What is a closed switchs function?

A

Completes the circuit

41
Q

What is a ammeters function?

A

Measures the current

42
Q

What is a voltmetres function?

A

Measures the voltage

43
Q

What is the energy transfer in a circuit?

A

Bulb - Electrical energy - Light energy

44
Q

Fill in the gaps: Electron comes from _____ in the circuit

A

1st gap wire

45
Q

Fill in the gaps: Electron _____ electrical energy from the battery and loses it to the _____

A

1st gap gains 2nd gap bulb

46
Q

Fill in the gaps: Bulb transfers electrical energy to _____ energy

A

1st gap light

47
Q

When switch is _____ electrons flow in the circuit

A

1st gap closed

48
Q

When switch is open, bulb is turned _____

A

1st gap off

49
Q

What is an insulator?

A

A material that does not allow electricity to flow through it easily (or heat)

50
Q

What are examples of insulators?

A

Plastic, concrete, wood, rubber

51
Q

What is a conductor?

A

A material that will allow electricity to pass through very easily

52
Q

What are examples of conductors?

A

Silver, gold, chopper, steel

53
Q

How do you connect an ammeter?

A

Connect in series (end to end)

54
Q

How do you connect a voltmeter?

A

Connect in parellel (in a loop)

55
Q

What is resistance?

A

Opposition to the flow of charges in a circuit

56
Q

What is the unit for resistance?

57
Q

How else can you represent resistance?

A

(R) uppercase

58
Q

What is potential difference?

A

The amount of energy transfer per unit of charge

59
Q

What is the unit for voltage?

A

(V) uppercase

60
Q

How else can you represent potential difference?

A

P.D uppercase

61
Q

True or false potential difference and voltage are the same?

62
Q

What is the unit for potential difference

63
Q

What is the unit for charge?

64
Q

What is the symbol of quantity for charge?

A

Q (uppercase)

65
Q

What is the formula to calculate voltage?

A

Voltage = Current x Resistance

66
Q

What is another way to represent the formula to calculate voltage?

67
Q

What does DESCU stand for?

A

D = Data E = Equation S = Substitute C = Calculate U = Unit

68
Q

Q1) 3 A flows through a 240 V lamp. What is the resistance of the lamp?

A

80 ohms (use DESCU)

69
Q

1.5 A current flows through a bulb of resistance 10 ohms. Calculate the voltage across a battery?

A

15 volts (use DESCU)

70
Q

Calculate the current in the circuit if the resistance of a washing dryer is 200 ohms and potential difference across is 240 V?

A

1.2 A (amperes)

71
Q

What is a series circuit?

A

When components are attached in a single loop end to end

72
Q

How is a ammeter connected?

A

Connected in series (end to end) to the component

73
Q

How is a volt meter connected?

A

Connected in parallel (in a loop over the bulb sometimes) to the component

74
Q

True or false? Current in a series circuit at any point remains the same?

75
Q

True or false? In a series circuit the voltage is shared between components

76
Q

True or false? In a parellel circuit, if a lamp breaks or a component is disconnected from one parellel wire, the components on different branches keep working?

77
Q

True or false? Current in a parellel circuit is shared between different loops or branches

78
Q

True or false? Total current in a parellel circuit is equal to sum of currents in all the branches

79
Q

True or false? Voltage across each loop/branch is the same as the voltage of the power supply

80
Q

MEMORISE! IF YOU DONT KNOW ALL OF THIS PUT AS A RATING 1!

Current: For a SERIES CIRCUIT: Remains the same at any point in the circuit.

Current: For a PARALLEL CIRCUIT: Current split at junction into branches loops/branches.

Voltage: For a SERIES CIRCUIT: Voltage of power supply is shared between components.

Voltage: For a PARALLEL CIRCUIT: Voltage remains the same across each loop/branch.

A

Is it a 1 or 5…?

81
Q

Give the name of the part that provides energy for each circuit?

82
Q

Why is copper used for wires in a circuit?

a) Copper does not stick to a magnet

b) Copper is a brown metal

c) Copper is a good conductor of electricity

Copper is a good conductor of heat

A

c) Copper is a good conductor of electricity

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