magnetic field and lines of force work sheet

Magnetic field

Definition:space around thwe magnet in which its influence can be felt is called magnetic field.

Denoted by: B

Formula:F=mB

Units:oersted,tesla,guass

Consists of:lines of force

Element of magnetic field:dip,declination.

Lines Of Force

Definition:line along which a freely suspended north pole tends to move is called magneticfeild.

Properties of magnetic field;

1.outside the magnet they move from north to south.

2.inside the magnet they move from south to north.

3.they are closed and curved.

4.ther are crowded at poles as poles nare stronger.

5.no two lines of force will ever intersect because if they intersect field is in two directions which is not possible.

Questions on magnetic field and lines of force:

1.why field lines are crowded at poles?

2.define dip and declination?

3.define pole strength and its units?

4.why 2 lines of force will never intersect?

5.why earth behaves as giant magnet?

6.what is sure test of magnetism?

7.how does freely suspended magnet aligns?

8.what are the ferro,para and  diamagnetic substances.give egs of ferromagnetic substances?

9.draw figures of lines of force for uniform magnetric field ,2 magnets with like poles facing each other and unlike poles facing each other?

10.what do you mean by permeabiloity of the medium and what is its value?

11.what is magnetic flux?

12.what are 3 different ways to produce magnetic field?

13.what does tangent at a point on line of force indicate?

14.can we separate two poles?

15.what is difference between gravity and magnetism?

16.what is difference between longitudes and lines of force?

17.describe an activity and how to draw lines of force?

18.what is neodymium and its composition?

19.what are electromagnets give eg?