Magnetism

Question 1

*Branch of physics dealing with magnets and magnetic
phenomenon
*The property, quality or condition of being magnetic

Answer 1

Magnetism

Question 2

Ability of matter to attract iron

Answer 2

Magnetic

Question 3

Materials that are unaffected by when brought into a magnetic field

Answer 3

Non-magnetic

Question 4

They are strongly attracted by a magnet and can usually be permanently magnetized by exposure to a magnetic field

Answer 4

Ferro-magnetic

Question 5

Materials lie between ferromagnetic and non-magnetic. They are slightly attracted to a magnet and loosely influenced by an external magnetic field

Answer 5

Para-magnetic

Question 6

Small magnet created by the
electron orbit

Answer 6

Magnetic Dipole

Question 7

When proton in a hydrogen nucleus spins on its axis and
created a nuclear magnetic dipole (basis of MRI)

Answer 7

Magnetic Moment

Question 8

Materials are weakly repelled by either magnetic pole

Answer 8

Diamagnetic

Question 9

Principal Types of Magnet

Answer 9

1.Naturally Occurring Magnets
2.Artificially Induced Permanent Magnet
3.Electromagnets

Question 10

• The best example of a natural magnet is the EARTH itself. The Earth has a magnetic field because it spins in an axis.
• LODESTONE is another example of a naturally occurring magnet, it consists of an iron oxide and exhibits strong magnetism,
  presumably, they have remained undisturbed in the earth’s magnetic field for a long time.

Answer 10

Naturally Occurring Magnets

Question 11

• Usually made up of iron and available in many sizes and shapes (bar magnet, horse-shoe magnet).
• Such permanent magnets do not necessarily stay permanent.
• One can destroy the magnetic property of a magnet by heating it or even by hitting it with a hammer.

Answer 11

Artificially Induced Permanent Magnet

Question 12

• BLANK consists of a wire wrapped around an iron core. When an electric current is conducted through the wire, a magnetic field is proportional to the electric current.
• The intensity of the magnetic field is proportional to the electric
  current.

Answer 12

Electromagnets

Question 13

• It states that like magnetic poles repel and unlike magnetic poles attract.
• The second principal law of
  BLANK relates to the magnetic force of attraction or repulsion.

Answer 13

Law of Magnetism

Question 14

What is the SI unit of magnetic field
strength? And what is the other common unit?

Answer 14

1 Tesla (T) = 10,000 Gauss (G).