Physics 7.1.3 Flashcards
All Magnets are Surrounded by a…
Magnetic Field.
What is a ‘Magnetic Field’?
The Region Around a Magnet where a Force Acts on Another Magnet, or on a Magnetic Material (eg Iron, Steel, Cobalt, Nickel).
What are ‘Magnetic Field Lines’ Used to Represent’?
Magnetic Field Lines are Used to Represent the Strength & Direction of a Magnetic Field.
In Magnetic Field Lines, the Direction of the Magnetic Field is Shown Using…
Arrows.
In Magnetic Field Lines, the Strength of the Magnetic Field is Shown by the…
Spacing of the Magnetic Field Lines.
What does it Mean if the Magnetic Field Lines are Close Together?
If the Magnetic Field Lines are Close Together, then the Magnetic Field will be Strong.
What does it Mean if the Magnetic Field Lines are Far Apart?
If the Magnetic Field Lines are Far Apart, then the Magnetic Field will be Weak.
What are the Rules which Must be Followed when Drawing Magnetic Field Lines? (2)
-Always go from North to South. (Indicated by an Arrow Midway Along the Line).
-Must Never Touch or Cross other Field Lines.
Where is the Magnetic Field Strongest?
At the Poles.
The Magnetic Field is Strongest at…
The Poles.
The Poles are Where the Magnetic Field Lines are…
Closest Together.
The Magnetic Field Becomes Weaker as the ___ from the Magnet ___. Why?
Distance, Increases. Because the Magnetic Field Lines are getting Further Apart.
Why does the Magnetic Field Become Weaker as the Distance from the Magnet Increases?
Because the Magnetic Lines are getting Further Apart.
An Attractive Force can be Experienced Between: (2)
-The Opposite Poles of 2 Different Permanent Magnets.
-A Magnet & a Magnetic Material (Due to Induced Magnetism).
A Magnet will Always Induce the ___ Pole in the Closet End of a Magnetic Material.
Opposite.
Where will a ‘Uniform Magnetic Field’ be Produced?
A Uniform Magnetic Field will be Produced in the Gaps Between Opposite Poles.
What is a ‘Uniform Magnetic Field’?
A Uniform Magnetic Field is One that has the Same Strength & Direction at All Points.
How do you Show that the Magnetic Field has the Same Strength at All Points?
Equal Spacing Between All Magnetic Field Lines.
How do you Show that the Magnetic Field is Acting in the Same Direction at All Points?
There Must be an Arrow on Each Magnetic Field Line, going from the North Pole to the South Pole.
