Magnetism

Question 1

some material that possess magnetic properties?

Answer 1

nickel, iron, cobalt

Question 2

how are magnetic fields generated?

Answer 2

rotating electric charge

Question 3

all electrons have spin

true/false

this results in ___ magnetic fields

Answer 3

true

opposing

Question 4

when unpaired electrons pair up, their opposing spins ____ out, and produce a _____

Answer 4

cancel, magnetic field

Question 5

what is the Pauli exclusion principle?

Answer 5

all empty energy ‘spots’ must be filled before pair can be made

Question 6

what is soft iron?

Answer 6

iron placed into electric field, domain aligns temporarily, domain returns to being randomly aligned when field is removed

Question 7

what is hard iron?

Answer 7

iron placed in magnetic field, domain aligns and retains alignment when field is removed, resulting in a permanent magnet

Question 8

what is a magnetic field (B)? units?

Answer 8

region where a magnetic force acts on any other magnet

Tesla (T)

Question 9

magnets always have two poles true/false

what is the sum of their poles?

Answer 9

true

0

Question 10

4 similarities between magnets and electric charges?

Answer 10

• can attract other objects
• like repel
• unlike attract
• can be described in terms of fields

Question 11

what is the Right Hand grip rule in terms of direction of conventional current and magnetic fields?

Answer 11

the direction of the pointed thumb is the direction of the conventional current

the direction of the curled fingers is the direction of the magnetic field

Question 12

what is a solenoid?

Answer 12

a wire that has been wounded up into a coil, and when a current is passed through it, a magnetic field is produced inside and outside the solenoid