Magnet

Question 1

What does a compass show?

Answer 1

Magnetic north and Magnetic south pole

Question 2

What happens when two magnets of the same type come together?

Answer 2

They repel each other

Question 3

What happens when two magnets of opposite types come together?

Answer 3

They attract each other

Question 4

What is an electrical current?

Answer 4

The flow of electricity through a circuit

Question 5

What is the purpose of an electrical current?

Answer 5

To give power and perform tasks such as turning on a lightbulb

Question 6

What are the characteristics of magnets?

Answer 6

• Repel some materials
• Usually made of iron
• Attract to some materials

Question 7

What is an electromagnet?

Answer 7

A magnet created by a coiled conductive wire around an iron core

Question 8

What components make up an electromagnet?

Answer 8

A coil of wire (solenoid), current, and core

Question 9

What material is commonly used for the coil in an electromagnet?

Answer 9

Copper

Question 10

What role does current play in an electromagnet?

Answer 10

It flows through the wire and lines up the domains

Question 11

What does the current create around the coiled wire?

Answer 11

A magnetic field

Question 12

How does an electromagnet differ from a bar magnet?

Answer 12

An electromagnet is a non-permanent magnet that can be switched on and off

Question 13

Fill in the blank: An electromagnet consists of a coil of wire (solenoid) carrying a current through a _______.

Answer 13

core

Question 14

What is the Earth described as in relation to magnetism?

Answer 14

The Earth is a big magnet

This refers to the Earth’s magnetic field and its properties.

Question 15

What is the relationship between the geographical north pole and the magnetic north pole?

Answer 15

The geographical north pole is the magnetic north pole

This indicates that the Earth’s magnetic field aligns with its geographical coordinates.

Question 16

What is the relationship between the geographical south pole and the magnetic south pole?

Answer 16

The geographical south pole is the magnetic south pole

Similar to the north pole, this shows the correspondence between geographical and magnetic locations.

Question 17

What do a magnet and a plotting compass have in common?

Answer 17

Both have north-seeking poles

This indicates that they both orient themselves in relation to the Earth’s magnetic field.

Question 18

What color indicates the north-seeking pole of a compass?

Answer 18

Red

The red end of the compass needle points towards the magnetic north.

Question 19

What color indicates the south-seeking pole of a compass?

Answer 19

White

The white end of the compass needle points towards the magnetic south.

Question 20

What does a compass point towards when placed next to a magnet?

Answer 20

The compass will only point towards the magnetic fields

This indicates the influence of magnetic fields on nearby objects.

Question 21

What type of charge do every electron and proton possess?

Answer 21

Electric charged atom

Electrons have a negative charge while protons have a positive charge.

Question 22

Why is chromium considered anti-magnetic?

Answer 22

Chromium’s atoms will line up in an orderly fashion to be magnetic or to not be magnetic, using the arrangement that takes less energy

This property affects its magnetic characteristics.

Question 23

What is located at the center of all atoms?

Answer 23

Protons or electrons

Typically, the nucleus contains protons and neutrons, while electrons are found in shells around the nucleus.

Question 24

What happens to the magnetic properties of atoms with too many or too few atoms?

Answer 24

They aren’t magnetic

The balance of electrons and protons is crucial for magnetic properties.

Question 25

What are valence electrons?

Answer 25

Electrons that are outside the shell of the atoms ## Footnote Valence electrons play a key role in chemical bonding and reactions.

Question 26

True or False: Every electron is a tiny magnet of itself.

Answer 26

True ## Footnote This property contributes to the overall magnetic properties of materials.

Question 27

What are the labels used for the poles of a bar magnet?

Answer 27

N and S poles ## Footnote N stands for North pole and S stands for South pole.

Question 28

What does the diagram of a bar magnet show?

Answer 28

The field pattern around a bar magnet ## Footnote The field lines indicate the direction and strength of the magnetic field.

Question 29

Where is the magnetic field strongest around a bar magnet?

Answer 29

At the poles ## Footnote The strength of the magnetic field decreases as you move away from the poles.

Question 30

Fill in the blank: The magnetic field is ______ at the center of a bar magnet.

Answer 30

weak ## Footnote The field strength is stronger near the poles and weaker at the center.

Question 31

True or False: The magnetic field lines around a bar magnet are always closed loops.

Answer 31

True ## Footnote Magnetic field lines exit from the North pole and enter the South pole, forming closed loops.

Question 32

What are superconductors known for?

Answer 32

Zero electrical resistance and amazing magnetic properties ## Footnote Superconductors can conduct electricity without energy loss and exhibit magnetic phenomena such as the Meissner effect.

Question 33

What is the phenomenon of zero electrical resistance in superconductors?

Answer 33

The ability to conduct electricity without any loss of energy ## Footnote This occurs below a certain critical temperature specific to each superconductor.

Question 34

What remarkable magnetic property do superconductors exhibit?

Answer 34

The Meissner effect ## Footnote This effect causes a superconductor to repel magnetic fields, leading to magnetic levitation.