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Magnets/electricity > Magnets/electricity > Flashcards

Magnets/electricity Flashcards

0
Q

What are magnets made up of?

A

Iron steel nickel and cobalt

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1
Q

Does every magnet have a magnetic field?

A

Yes

A flow of electrons thru metal causes a magnetic field

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2
Q

What are two things that happen with magnets are put together?

A

If put together the right way they connect (attract) which means north and south pole are put together

If they are put the wrong way which means north and north are put together or south and south then they repel

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3
Q

What can magnetism pass thru?

A

Gasses liquids and solids

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4
Q

Where does the most power come from the magnet?

A

The poles

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5
Q

Where is the magnet most weak?

A

Between its poles

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6
Q

Describe the concept of force of magnetism and distance

A

The farther away the magnets are, the weaker the force

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7
Q

What is electricity formed by?

A

By the flow of electrons (the negatively charged particles of atoms)

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8
Q

What are the two types of poles called on a magnet?

A

North pole

South pole

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9
Q

How do you measure the flow of electricity?

A

Amperes or amps

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12
Q

What is a current?

A

A steady flow of electricity

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12
Q

What are Circuits?

A

The unbroken paths that electrical currents often follow

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13
Q

What is a conductor?

A

A material that allows electrons to flow through it easily

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13
Q

What is an insulator?

A

Poor conductor of electricity

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14
Q

The force that pushes electrons thru a circuit is measured in?

A

Volts

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15
Q

What is a complete circuit?

A

A series of wires and/or electrical devices that form a closed path for electricity to flow through

16
Q

For a circuit to work it needs….

A

An electrical energy source-a cell

17
Q

What is a cell?

A

A single unit containing electrodes and electrolytes to produce energy

18
Q

What is a battery?

A

2 or more cells joined together-they change chemical energy into electricity

19
Q

In order to produce electricity you need….

A

A source of electrons
A conducting path
A place for the electrons to go

20
Q

What is a filament?

A

Connects 2 larger wires inside a light bulb

21
Q

What causes the light bulb to glow?

A

When electrons move from one wire to another thru the filament. The friction then causes the filament to heat up and glow

22
Q

What is electrical resistance?

A

Anything the hinders the flow of electricity

23
Q

Resistance depends on….

A 
Wire material
Wire thickness, length
Temperature of wire
Type of circuit
Number/type of electrical devices involved-bulbs,motors
24
Q

What is a series circuit?

A

One path for a current to flow therefore a break in the circuit stops the current from flowing

25
Q

What is a parallel circuit?

A

There are multiple pathways or circuits therefore if there is a break in the circuit there are other paths to follow and the circuit still works

26
Q

Less resistance equals…

A

Greater electrical current

27
Q

What is a switch?

A

A simple device that completes or interrupts an electrical path

28
Q

In a closed switch the switch is …..

A

On

Completes the path and allows flow of electricity

29
Q

In an open switch the switch is…..

A

Off

Stops the flow of electricity

29
Q

An object can have a positive, negative, or neutral charge

A
30
Q

For electricity to flow in a battery…..

A

A positive terminal must be connected to a negative terminal

31
Q

What is static electricity?

A

Created by rubbing and transferring electrons
Ex. Rubbing a balloon on your hair
Lightning

32
Q

What does a thermometer measure?

A

Heat energy

33
Q

Energy can change from ?

A

One form to another

34
Q

Energy from the sun is?

A

Is solar energy

35
Q

Heat Energy can be helpful or

A

Dangerous

36
Q

What types of energy is there?

A

Chemical, mechanical, electrical, heat, solar, light, renewable resources

Magnets/electricity (2 decks)

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