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Science > Test Electricity Dec. 12 > Flashcards

Test Electricity Dec. 12 Flashcards

1
Q

What is charges symbol, unit, and abbreviation?

A

Symbol Q unit coulomb and abbreviation C

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2
Q

What is currents symbol, unit and abbreviation?

A

Symbol I unit ampere abbreviation A

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3
Q

What is Voltages symbol, unit, and abbreviation?

A

Voltage symbol is V unit voltage abbreviation V

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4
Q

What is powers symbol, unit, and abbreviation?

A

Powers symbol is P unit watts abbreviation W

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5
Q

Explain what the difference between the one fluid model and two fluid model of electricity are.

A

The one fluid model, is that everything is made up of one fluid, that’s neutral. If something has more fluid than normal than its positive, and Vise Versa
The 2 fluid model is that there are 2 different fluids. One is positive, one is negative (enter the names here) if something has more positive fluid then it’s positive. Vise Versa

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6
Q

Who is Benjamin Franklin and which model of electricity did he come up with?

A

Benjamin Franklin is the guy who discovered electricity, and he proposed the one fluid model. Where everything was made up of a neutral fluid, and if an object had an excess of fluid, it would be positive

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7
Q

Which subatomic particle is able to move freely, and which ones are fixed? What does fixed mean?

A

Electrons are able to move, and protons and neutrons are fixed. Fixed means stationary, unmovable,

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8
Q

There are two possible electric charges, what are they?

A

Positive and negative

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9
Q

What does the statement “charge is conserved” mean?

A

You cannot creat it or destroy it

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10
Q

What is the law of charges?

A

Like charges repel and opposites attract

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11
Q

In a neutral object, what’s the ratio of positive to negative charges?

A

You have the same amount of negative to positive

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12
Q

An excess of negative charges produces a positively or negatively charges object? Explain why, or draw I diagram to explain why

A

If you have more negative stuffs, then it’s negative.
Why? Oh my goodness I really have to explain why….. Because if you have 3 white elephants, and 1 black elephants, then you have more white elephants…..

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13
Q

Explain how an object may be charged by friction ( be able to define friction as well)

A

Cause the electrons go from your hair to the balloon. Making your balloon negative

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14
Q

How is an object charged by contact?

A

When you’re negative, and you touch a positive conductor, then you both be neutral

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15
Q

Explain what induction is and how it is used to charge an object

A

Is a door knob has a lot of electrons,, then they want to get to the ground, so the jump off the knob (zap) through you, to get to the ground. (Like lightning)

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16
Q

How do you permanently charge an object using induction?

A

When you take a temporary charged object, and ground it! Then it retains its charge

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17
Q

How may an object discharge it’s electric charge

A

Grounding. They want to go to the ground to become neutral

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18
Q

Define the term grounding

A

When electrons go to the ground and become neutral. This is used in lights

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19
Q

Explain how the build-up of a charge creates lightning

A

Lots of electrons want to become neutral, so they jump from the cloud to the ground

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20
Q

What’s the difference between an insulator and a conductor? (Explain by describing how electrons move in each) give an example of each

A

Conductors like allowing electrons to flow through them freely. Like copper. Insulators are stuff that don’t like free moving electrons

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21
Q

Review the electrostatic phenomena we did be able to draw and explain activities such as the watch glass/meter stick activity. (Pick 2)

A

The electrons to to get to the pipe, so the meter stick moves a around in a circle

22
Q

Why did the rim of the tin plate have a negative charge when we placed it on the negatively charged styrofoam plate?

A

Cause all the electrons ran to the edge of the plate, making the top negative and the bottoms positive

23
Q

Why did the tin foil bit repel from the tin plate?

A

Because the pie plate was negative, and so was the foil bit. Like repel

24
Q

What happened to the tin foil ball when you placed your hand near it?

A

Boing (why?) you may be asking? Because your finger, the pie plate, and the foil but we’re all negative. The foil bit repelled from the pie plate AND your finger bouncing back and forth

25
Q

Why did you receive a shock when you touched the pie plate

A

Cause all the electrons went through you to get to the ground

26
Q

Explain what an electrical current is

A

It’s when electrons keep bumping into each other to get to the protons (this way, you can make lights light up)

27
Q

What are two things a current needs to continue to move electrons through a circuit?

A

It needs electrons, and protons. Without enough electrons, the electrons won’t be able to get to the protons. Without protons, the electrons will stay where they are. Because they want to get to the protons

28
Q

Explain what charge, current, voltage, and power are

A

Voltage:it is electrical potential
Current: it’s the rate at which electric charges move to a certain point
Power: the rate at which electrical energy is being used
Charge:negative or positive energy that builds up on an object

29
Q

How much current is in a circuit that has 240C flowing past a point in 15 seconds?

A

240 divided by 15

30
Q

What is the amperage of a circuit if 3545C flows past a point in the circuit in 3 seconds

A

3545 divided by 3

31
Q

How long was a 20 amp toaster on if 315C of charge flowed through it?

A

315/20

32
Q

How long was a 30 amp toaster on if 123C of charge flow through it?

A

123/30

33
Q

How much charge flows through a 14 ampere toaster that is on for 90 seconds?

A

15X90

34
Q

How much charge flows through a 0.45 ampere flashlight that is on for 2 minutes?

A

0.45X120

35
Q

Define voltage

A

It’s electrical potential

36
Q

What does electric potential difference mean?

A

The energy each electron has is called the electric potential

37
Q

What unit is used to measure energy?

A

It’s measured in jewels

38
Q

A copper wire is an example of a conductor. Explain how electrons move through it

A

They bump into each other until they get to the end. Then they start again

39
Q

Why is the response instantaneous?

A

Because ther a already electrons on the other end, it’s like a continuous domino effect, but really fast

40
Q

What does e stand for and why is it needed to create a circuit?

A

Energy it converts energy into other r energy

41
Q

What are 5 different types of e. Explain 2

A

Mechanical, thermal, sound, radiant, (sun) and chemical energy
Radiant: the light particles bump the electrons through the wire
Sound: sound energy takes a machine that recreates the vibrations that you make

42
Q

What are three parts of an electric circuit?

A

Source of electrical energy, electric load electric circuit control device and connectors

43
Q

What causes a bulb to burn brighter or dimmer in an electric circuit?

A

The more resistance, the brighter the bulbMore electrons

44
Q

Define resistance

A

Resistance is when electrons bump into nucleus’s, thus producing light and heat (that’s how electricity is made)

45
Q

Are charges used up in the production of light

A

NEVER

46
Q

Explain safety considerations in household electrical appliances

A

This is not on the test!

47
Q

Explain what a parallel circuit is

A

It’s when both lights get the same amount of electrons passing through it. They each get an even share

48
Q

What are some of the components of household wiring? Switches, fuses, circuit breakers, outlets etc.

A

Breaker box! If something goes out in your house you can turn it back on in the breaker box

49
Q

Solve problems to determine the electrical power used by various items. Sample problems on a different hand out

A

Ok will do

50
Q

What is times symbol, unit, and abbreviation?

A

symbol T unit seconds and abbreviation s

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