Electricity and magnetism

Question 1

what kind of particles attract and repel against one another?

Answer 1

particles with like electrical charges repel each other and particles with unlike particles attract one another

Question 2

what is an electrical current?

Answer 2

the movement of charged particles, usually electrons

Question 3

what is a conductor?

Answer 3

a material that allows electrons to move freely from atom to atom. eg metal

Question 4

what is an insulator?

Answer 4

a material that does not allow electrons to move freely from atom to atom. eg. plastic and rubber

Question 5

what are semiconductors?

Answer 5

substances whose ability to conduct electricity is midway between that or a conductor as an insulator. eg silicone used in electrical devices.

Question 6

what does electrical currents produce?

Answer 6

a magnetic field that affects magnetic substances such as iron in the same way a permanent magnet does

Question 7

what happens in an electromagnet?

Answer 7

the charged particles move along a coil or wire connected to a battery or other power source

Question 8

in a permanent magnet what creates the magnetic field?

Answer 8

the spinning of electrons

Question 9

what happens in an electric motor?

Answer 9

magnetic fields are produced by electric fields, the magnetic fields push against one another, turning the shaft of the motor.