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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

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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
What does a cell contain?
Positive and negative terminal
26
What do two cells create?
Battery
27
How do you draw a wire?
Straight line
28
How do you draw a battery?
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
29
What does a battery contain?
Two cells
30
How do you draw a voltmeter?
Straight line attached to a circle with a V inside (CAPITAL) attached to a straight line
31
How do you draw a bulb?
Straight line attached to a circle with a X inside (CAPITAL) attached to a straight line
32
How do you draw a ammeter?
Straight line attached to a circle with a A inside (CAPITAL) attached to a straight line
33
How do you draw a open switch?
Straight line attached to a circle with a diagnol line then a circle attached to a straight line
34
How do you draw a closed switch?
Straight line attached to a circle attached to a short line attached to a circle attached to a straight line
35
How do you draw a resistor?
Straight line attached to a rectangle attached to a straight line
36
What is a cells, batterys function?
Source of electrical energy
37
What is a wires function?
Source of electrons that transfer energy
38
What is a open switchs function?
Breaks the circuit
39
What is a bulbs function?
Transfer electrical energy to light energy
40
What is a closed switchs function?
Completes the circuit
41
What is a ammeters function?
Measures the current
42
What is a voltmetres function?
Measures the voltage
43
What is the energy transfer in a circuit?
Bulb - Electrical energy - Light energy
44
Fill in the gaps: Electron comes from _____ in the circuit
1st gap wire
45
Fill in the gaps: Electron _____ electrical energy from the battery and loses it to the _____
1st gap gains 2nd gap bulb
46
Fill in the gaps: Bulb transfers electrical energy to _____ energy
1st gap light
47
When switch is _____ electrons flow in the circuit
1st gap closed
48
When switch is open, bulb is turned _____
1st gap off
49
What is an insulator?
A material that does not allow electricity to flow through it easily (or heat)
50
What are examples of insulators?
Plastic, concrete, wood, rubber
51
What is a conductor?
A material that will allow electricity to pass through very easily
52
What are examples of conductors?
Silver, gold, chopper, steel
53
How do you connect an ammeter?
Connect in series (end to end)
54
How do you connect a voltmeter?
Connect in parellel (in a loop)
55
What is resistance?
Opposition to the flow of charges in a circuit
56
What is the unit for resistance?
Ohms
57
How else can you represent resistance?
(R) uppercase
58
What is potential difference?
The amount of energy transfer per unit of charge
59
What is the unit for voltage?
(V) uppercase
60
How else can you represent potential difference?
P.D uppercase
61
True or false potential difference and voltage are the same?
True
62
What is the unit for potential difference
Volts
63
What is the unit for charge?
Colulombs
64
What is the symbol of quantity for charge?
Q (uppercase)
65
What is the formula to calculate voltage?
Voltage = Current x Resistance
66
What is another way to represent the formula to calculate voltage?
V = I x R
67
What does DESCU stand for?
D = Data E = Equation S = Substitute C = Calculate U = Unit
68
Q1) 3 A flows through a 240 V lamp. What is the resistance of the lamp?
80 ohms (use DESCU)
69
1.5 A current flows through a bulb of resistance 10 ohms. Calculate the voltage across a battery?
15 volts (use DESCU)
70
Calculate the current in the circuit if the resistance of a washing dryer is 200 ohms and potential difference across is 240 V?
1.2 A (amperes)
71
What is a series circuit?
When components are attached in a single loop end to end
72
How is a ammeter connected?
Connected in series (end to end) to the component
73
How is a volt meter connected?
Connected in parallel (in a loop over the bulb sometimes) to the component
74
True or false? Current in a series circuit at any point remains the same?
True
75
True or false? In a series circuit the voltage is shared between components
True
76
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?
True
77
True or false? Current in a parellel circuit is shared between different loops or branches
True
78
True or false? Total current in a parellel circuit is equal to sum of currents in all the branches
True
79
True or false? Voltage across each loop/branch is the same as the voltage of the power supply
True
80
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.
Is it a 1 or 5...?
81
Give the name of the part that provides energy for each circuit?
Battery
82
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
c) Copper is a good conductor of electricity

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