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Physics > Magnetism And Electromagnetism > Flashcards

Magnetism And Electromagnetism Flashcards

1
Q

What are the poles of magnets ?

A

Where the magnetic forces are strongest

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2
Q

What happens when 2 Magnets are brought close to each other ?

A

exert a force on each other

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3
Q

What do 2 like poles do ?

A

Repel each-other

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4
Q

What do 2 unlike poles do ?

A

Attract each-other

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5
Q

Magnetic force is a —- ————- force ?

A

Non contact

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6
Q

What does a permanent magnet do ?

A

Produce its own magnetic field

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7
Q

What does an induced magnet do ?

A

becomes a magnet when it is placed in a magnetic field

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8
Q

What does an induced magnet always do ?

A

causes a force of attraction

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9
Q

When an induced magnet is removed from the magnetic field what happens ?

A

loses most/all of its magnetism quickly

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10
Q

What is the region around a magnet where a force acts on another magnet or on a magnetic material ?

A

Magnetic field

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11
Q

What is the force between a magnet and a magnetic material ?

A

Attraction

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12
Q

What does the strength of a magnetic field depend on ?

A

depends on the distance from the magnet

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13
Q

Where is the magnetic field strongest ?

A

The poles

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14
Q

What is the direction of the magnetic field line ?

A

North Pole ——> South Pole

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15
Q

What does a magnetic field compass contain ?

A

A small bar magnet

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16
Q

In what direction does the compass needle point ?

A

In the direction of earths magnetic field

17
Q

What happens when a current flows through conducting wire?

A

A magnetic field is produced around the wire

18
Q

What does the strength of the magnetic field depend on?

A

current through the wire

distance from the wire

19
Q

What happens to the strength of magnetic field when you shape a wire to form a solenoid?

A

It increases

20
Q

What is the magnetic field like inside a solenoid?

A

Strong and uniform

21
Q

What Would increase the strength of the magnetic field of a solenoid?

A

An iron core

22
Q

What is an electromagnet?

A

A solenoid with an iron core

23
Q

What is the motor effect?

A

When a conductor carrying a current is placed in the magnetic field the magnet producing a field and the conductor exert a force on each other

24
Q

What is the basis of an electric motor?

A

A coil of wire carrying a current in a magnetic field that rotates

Physics (5 decks)

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