magnetism

Question 1

like poles

Answer 1

repel

Question 2

opposite poles attract

Question 3

what is magnetic field

Answer 3

All magnets have a magnetic field. A magnetic field is the space around a magnet where magnetic forces are felt (both attraction and repulsion).

Question 4

lines of force

Answer 4

1.Shape is shown by lines of force which can be straight, curved, circular, etc.
2.Direction is shown by arrowheads. The direction is always from North to South. 3.Strength is shown by how close the lines are to each other. The closer the lines of force are, the stronger the magnetic field.

Question 5

magnetic field of bar magnet

Question 6

Magnetic Field of a Horseshoe Magnet

Question 7

compass attraction

Answer 7

Geographic north attracts the north of a compass needle. This means that magnetically speaking, geographic north is really a magnetic south pole.

Question 8

electromagnetism

Answer 8

A straight wire with a current flowing through it has a circular magnetic field around it. The magnetic field is represented by circular lines around the wire.

Question 9

left hand rule

Answer 9

thumb in direction of current - to +
curl of fingers direction of magnetic field lines

Question 10

how to increase the intensity of the magnetic field of a live wire (wire with electric current running through it),

Answer 10

1.Increase the current intensity.
2.Use a better conductor. Remember: Metals are conductors. Some metals are better conductors than others. Examples of good conductors: gold, silver, copper
Examples of poor conductors: nichrome