Magnetic fields (7) Flashcards Preview

Physics A-Level AQA definitions > Magnetic fields (7) > Flashcards

Flashcards in Magnetic fields (7) Deck (7)
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1
Q

Magnetic field

A

a region where a magnet exerts a force on other magnets or magnetic materials, even if they are not in contact.

2
Q

Electromagnets made using a soft magnetic core

A

lose their magnetism if the current is turned off (e.g. iron).

3
Q

Electromagnets made using a hard magnetic core

A

retain their magnetism when the current is turned off (e.g. steel).

4
Q

Magnetic flux density

A

the number of magnetic flux lines that pass through an area of 1m2.

5
Q

Tesla

A

the flux density that causes a force of 1N on a 1m wire carrying a current of 1A at right angles to the flux.

6
Q

Cyclotron

A

a particle accelerator that accelerates charged particles through a spiral path using a fixed magnetic field and an alternating potential difference.

7
Q

Synchrotron

A

a particle accelerator that accelerates charged particles through a circular path using a varying magnetic field.