Electricity And Magnetism

Question 1

What is a magnet?

Answer 1

Any object that produces a magnetic field

Question 2

What are field lines?

Answer 2

Arrows drawn around a magnet from trhe north to souht pole

Question 3

How to draw magnetic field lines?

Answer 3

Draw a line going into the sotuh and out of the north. Draw 2 more lines at an angle going into the S and out of the N. Ovals on the sides towards the south.

Question 4

What are the rules of field lines?

Answer 4

the more dense the field lines are, the stronger the magnetic field is in that area.

Question 5

How to find the field lines of a magnet using a compass?

Answer 5

A compass has a tiny bar magnet. it will line up with the field lines of whatever magnetic field it is put in. It will point towards the south pole of a magnet.
Place the compass around the magnet and in whichever direction it faces, draw an arrow. eventually the game magnetic field lines will be created.

Question 6

What is a permanent magnet?

Answer 6

Produce their own magnetic field all the time.

Question 7

What is an induced magnet?

Answer 7

Only have a magnetic field temporarily. When a piece of magnetic material is put in the field of a permanent magnet. it will develop its own magnetic field. this means it’s an induced magnet. It will lose magnetsim when removed from the magnetic field of a permanent object.

Question 8

What is an example of a permanent magnet?

Answer 8

Bar Magnet

Question 9

What are magnetically soft materials?

Answer 9

Materials that lose their magnetism very quickly. (Nickel and iron)

Question 10

What are magnetically hard materials?

Answer 10

Materials that lose their magnetism slowly. (Steel)

Question 11

What is static electricity?

Answer 11

the buildup of charge on insulating materials. Called sparks when discharged. Only negative electrons are transferred.

Question 12

What are 2 examples of insulating materials?

Answer 12

Polythene rod and cloth.

Question 13

How does static electricity work?

Answer 13

The rubbing of certain materials against one another can transfer negative charges, or electrons. For example, if you rub your shoe on the carpet, your body collects extra electrons. The electrons cling to your body until they can be released. As you reach and touch your furry friend, you get a shock.

Question 14

What happens if an object keeps gaining negative electrons?

Answer 14

A potential difference will develop between an object and the earth. Electrons will jump across the gap and create a spark.

Question 15

How are field lines in particle and negative particles?

Answer 15

In positive particles, they go out
In negative particles they go in

Question 16

What happens when 2 opposite-charged particles come together?

Answer 16

The forces will attract. An electrostatic force. Their field lines will extend to eachother.

Question 17

What happens when 2 similarly-charged particles come together?

Answer 17

They will repel.

Question 18

How do electric fields and air interact?

Answer 18

Air cant conduct electricity. However, if the electric field is strong, ionization can occur. The air particles can lose electrons and becomes positive ions. Air can now conduct electricity., This is how sparks travel through objects.