Magnetism

Question 1

What causes a material to be “magnetic”?

Answer 1

If a large percentage of atoms which it is comprised.

Question 2

Suppose you have two bar magnets. One has the north and south poles marked, but the other one does not. Describe how you might use the first magnet to identify the poles on the unmarked magnet.

Answer 2

Then you will the magnet put the one part of the magnet next to the North Pole. If it repels then it is North, but if it abstracts then it is South.

Question 3

What are magnetic domains?

Answer 3

They are cutters of aligned atoms.

Question 4

How do magnetic domains respond to a strong magnetic field?

Answer 4

The magnetic domains align with the magnetic fields

Question 5

Why can heating a magnet cause it to become less magnetic?

Answer 5

The heating could dieseling the atoms in the magnet.

Question 6

What geographic direction does the north pole of a compass point?

Answer 6

North

Question 7

Toward which pole of a bar magnet does the north pole of a compass point?

Answer 7

The South

Question 8

If the Earth is a giant magnet, which pole of the magnet is located near the geographic north pole of the Earth?

Answer 8

The north pole

Question 9

What is present in the space around a wire carrying current?

Answer 9

The magnetic field

Question 10

Two wires located next to each other have current flowing in the same direction.

a. Will they feel an attractive force or a repulsive force?
b. Is this an electric force or a magnetic force?

Answer 10

a. Attractive force

b. Magnetic force

Question 11

Describe how to make a strong electromagnet?

Answer 11

There are 3 ways:

• changing the number of coils of wire,
• changing the current in the wire,
• changing the material used for the core.

Question 12

Magnetism results from?

Answer 12

The motion of electrically charged particles

Question 13

Every spinning e-?

Answer 13

A tiny magnet

Question 14

If e- pairs spin opposite directions?

Answer 14

They cancel

Question 15

What element does not have a magnetic field?

Answer 15

Water

Question 16

Magnetic poles

Answer 16

The ends of a magnet where the force is the greatest.

Question 17

Magnetic force

Answer 17

The force between the poles of magnets

Question 18

Magnetic field

Answer 18

Region around a magnet that exerts a force on magnetic materials. The space all around a magnet where the force of the magnet can act.

Question 19

Magnetism

Answer 19

A class of phenomena in which a field of force is caused by the alignment of the magnetic moments of atoms in the same direction (domains) - ferromagnetism - or by a moving electric charge charge - electromagnetism.

Question 20

Diamagnetism

Answer 20

The phenomenon caused by the orbital motion of electrons in the atoms of any material.

Question 21

Paramagnetism

Answer 21

Due to the alignment of unpaired spins of lecterns in atoms of a material. All materials thus respond to some extent to a magnetic field, but only ferromagnetic materials show a readily apparent respond.

Question 22

What would show the magnetic field of a magnet?

Answer 22

A magnetic field may can be seen when iron filings are sprinkled near a magnet. The iron filings form a pattern of lines. These lines are called lines of force. Lines of force show where the magnetic field is and what it looks like.

Question 23

Explain the difference between the two poles of a magnet.

Answer 23

The ends of a magnet are called the poles. A magnetic field is strongest at the poles. A magnet has two poles - a north pole and a south pole. The poles are equal in strength.

The north pole of one magnet attracts the south pole of another magnet. The south pole of one magnet attracts the north pole of another magnet. But the north pole of one magnet repels, or pushes away, the north pole of another magnet. In the same way, the south pole of one magnet repels the south pole of a second magnet.

Question 24

How is magnetism used to produce electricity?

Answer 24

Magnetism can be used to produce electricity. This can be done by moving a magnet through a coil of wire. Electricity is produces as long as the magnet moves through the coil. A generator produces electricity this way.

Question 25

What are some uses of electromagnets?

Answer 25

Electromagnets are often used in scrap yards to lift metal and move it. Many electromagnets are strong enough to lift heavy objects, such as cars. Electromagnets are also used in telephones.

Question 26

In what ways are electricity and magnetism alike?

Answer 26

Electricity and magnetism both produce a force that can pull or push things without touching them. They both have opposite states: electricity has positive and negative, and magnetism has north-seeking and south-seeking. In both, opposite states attract and same states repel.

Question 27

What will happen if you put a compass next to an electromagnet that is switched on?

Answer 27

The compass needle will turn because an electromagnet produces a magnetic field. The magnetized compass needle will move to line up with the field lines.