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gcse physics year 11 > Topic 7 > Flashcards

Topic 7 Flashcards

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1
Q

What 2 poles do all magnets have

A

North and south

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2
Q

What do all magnets produce

A

A magnetic field

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3
Q

What is a magnetic field

A

A region where other magnets or magnetic materials such as iron experience a non-contact force

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4
Q

The closer the magnetic field lines are the …

A

Stronger the magnetic field

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5
Q

The further away from a magnetic you get …

A

The weaker the magnetic field

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6
Q

When is the magnetic field at its strongest

A

At the poles of the magnet. This means that the magnetic forces are also strongest at the poles

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7
Q

What 2 ways can a force be

A

Attractive or repulsive

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8
Q

When do forces repel each other

A

When 2 poles are the same

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9
Q

What are the 2 types of magnets

A

Permanent magnets and induced magnets

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10
Q

What are permanent magnets

A

They produce their own magnetic field

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11
Q

What are induced magnets

A

Magnetic materials that turn into a magnet when they’re put into a magnetic field

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12
Q

What is ‘the force like between permanent and induced magnets’

A

Always attractive

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13
Q

How do induced magnets lose their magnetism and stop producing a magnetic field

A

If you take away the magnetic field

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14
Q

What happens when you take away the magnetic field in induced magnets

A

Thy quickly lose their magnetism and stop producing a magnetic field

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15
Q

What happens when a current flows through a wire

A

A magnetic field is created around the wire

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16
Q

What is the magnetic field that is created around the wire made up of

A

Concrete circles perpendicular to the wire, with the wire in the centre

17
Q

How does the strength of the magnetic field produced change

A

With the current and the distance from the wire

18
Q

The larger the current through a wire or the closer to the wire you are …

A

The stronger the magnetic field

19
Q

How can you increase the strength of the magnetic field that a wire produces

A

By wrapping the wire into a coil called solenoid

20
Q

Force (N) =

A

Magnetic flux density(T) X Current(A) X length(M)

21
Q

What does the force acting on a conductor in a magnetic field depend on

A
  • the magnetic flux density
  • the length of the conductor
  • the size of the current

gcse physics year 11 (8 decks)

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