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Grade 09 - Science > Unit 1 - Electricity > Flashcards

Unit 1 - Electricity Flashcards

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1
Q

What is a triboelectric series?

A

A chart that shows different materials.

The higher a material is on the series, the greater its tendency to lose electrons

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2
Q

Name three good conductors

A 
Copper
Aluminum
Iron
Mercury
Other minerals
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3
Q

Name three good insulators

A

Rubber
Wood
Plastic
Pure water

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4
Q

Name three FAIR conductors

A 
Water with minerals
Moist air
Human body
Carbon
Soil
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5
Q

What does the law of attraction state?

A

Opposites attract, and same charge repel.

Negative —> Positive

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6
Q

In a series circuit, what happens when you double the load?

A

Double the load, HALF THE CURRENT.
For example, if a series circuit has a current of 0.30 C/s with one light bulb, when you add another light bulb it will be 0.15C/s

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7
Q

What is Kirkoff’s law for a series circuit?

Current and voltage

A

The current is the same throughout the circuit, no matter where you measure it.
I=I=I=I=I…
The total voltage is obtained by adding all the voltage drops in the circuit.
Total voltage = V+V+V+V+V…

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8
Q

What does kirkoff’s law state for parallel circuits?

A

The voltage is the same throughout the circuit, no matter where you measure it.
V=V=V=V=V…
The total current is obtained by adding all the current drops in the circuit.
Total current = I+I+I+I+I+I…

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9
Q

What is the formula for finding the voltage is a circuit?

A

V = IR

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10
Q

How do you charge something by contact?

A

Charging by contact occurs when electrons are transferred from the charged object to the neutral object that it touches.

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11
Q

Define ‘power’ in electricity

A

Power is the amount of energy used per second.

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12
Q

What particle is transferred to create electricity?

A

Electrons.

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13
Q

How does friction affect electrons?

A

It can transfer them from one element to another depending on their places in the triboelectric series.

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14
Q

What’s the term used to explain the triboelectric series?

A

Electron affinity.

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15
Q

How do charges behave?

A

Opposites attract, like charges repel.

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16
Q

When is water an insulator?

A

When it is pure. Otherwise dissolved minerals act as conductors.

17
Q

How can you detect static charge?

A

Using an electroscope, or a pith ball.

18
Q

What is ground?

A

A thing with so many electrons that is can neutralize anything that it is connected to.

19
Q

What is induction?

A

The movement of electrons caused by other charged object that are not in contact.

20
Q

How does charging by induction occur?

A

A charged object is brought near but not touched to a neutral conducting object. The presence of a charged object near a neutral conductor will induce electrons within the conductor to move.

21
Q

What is electrical discharge?

A

The spark from static electricity moving.

22
Q

Why does lightning strike?

A

The electron buildup at the bottom of the cloud build up and create a positive charge on the ground, which it then compensates for by discharging electrons in the form of lightning.

23
Q

How does a Van de Graff generator work?

A

The friction between the rubber belt and the comb create a negative charge, which is transferred to the metal sphere.

24
Q

What is a load in a circut?

A

A part of a circuit that converts electrical energy into another type of energy.

25
Q

What is a source?

A

A part of a circuit that converts any type of energy into electrical energy.

26
Q

What is a conductor?

A

Part of a circuit that allows electrons to flow.

27
Q

What is a control?

A

A part of a circuit that toggles the flow of electrons.

28
Q

What is an electrolyte?

A

A liquid or paste that contains chemicals that form ions.

29
Q

What is an electrode?

A

A strip of metal that reacts with electrolytes.

30
Q

What is the difference between a wet and dry cell?

A

A wet cell uses liquid, and a dry cell uses a paste.

31
Q

What path do electrons take?

A

The path of least resistance.

32
Q

What are conductors?

A

An object or type of material that allows the flow of electrical current in one or more directions

33
Q

What are insulators?

A

An object or type of material that does not allow electrical current to flow freely through it.

Grade 09 - Science (6 decks)

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