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Physics GCSE > Magnetism And Electricity > Flashcards

Magnetism And Electricity Flashcards

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1
Q

North + south

A

Attract

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2
Q

South + south / north + north

A

Repel

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3
Q

Which way do magnetic field lines go from

A

North ——> south

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4
Q

How to make an electromagnet

A

Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail

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5
Q

What is a permanent magnet

A

A substance made up of small magnetic regions (domains) that all mostly line up and face the same direction

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6
Q

What is an induced magnet

A

Substances whose domains are not naturally facing the same directions, but when put in a magnetic field of magnetic objects, they are able to line up, making them temporary and induced magnets.

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7
Q

Magnetic metals

A

Iron
Nickel
Cobalt

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8
Q

What is the magnetic field around a wire

A

There is a magnetic field around a wire that carries current

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9
Q

When the current flows up the magnetic field goes

A

Anti-clockwise

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10
Q

When the current goes down the magnetic field line is

A

Clockwise

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11
Q

What does the strength if the field around a wire depend on

A
  • the magnitude of the wire
  • the distance from the wire
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12
Q

What is the strength of the magnetic field measured in

A

Teslas (T)

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13
Q

What is magnetic flux density

A

The strength of the magnetic field

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14
Q

Magnetic north is equal to

A

Geographic south

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15
Q

What does a magnet point to

A

The magnetic North Pole, aka the south

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16
Q

What does a magnet point to

A

The magnetic North Pole, aka the south

17
Q

What is a solenoid

A

Many parallel loops that make a coil, and solenoids often carry a current to create an electromagnet

18
Q

How do you make a solenoid electromagnet stronger

A
  • add a magnetic core (eg, iron, cobalt, nickel)
  • add more loops to the coil
  • send a higher amount if current through the solenoid
19
Q

When a current goes upwards, you model it using a

A

Dot

20
Q

When a current goes downwards, you show it with a

A

Cross (x)

Physics GCSE (7 decks)

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