Magnetism

Question 1

difference between soft and hard magnet

Answer 1

soft magnet retains magnetization in a better way

Question 2

coil/ solenoids

Answer 2

Spule

Question 3

how is the strength of an induced magnetic field affected?

Answer 3

• close or far of wire

- increasing current –> increasing magnetic field

Question 4

factors affecting magnitude of motor effect

Answer 4

• angle to magnetic field
• ac/dc
• length of conductor in electric field (smaller length, higher force)
• magnitude of magnetic field and current (increases when increases)

Question 5

gleiche Pole

Answer 5

like poles

Question 6

poles of magnets ________ metals

Answer 6

attract

Question 7

How can you test whether a magnet is permanent?

Answer 7

check whether they repel another permanent magnet

Question 8

Ladungsträger

Answer 8

charge carriers

Question 9

How do you demagnetize permanent magnets?

Answer 9

heat above their Curie temperature

Question 10

reverse current through wire

Answer 10

magnetic field reversed

Question 11

increase strength of magnetic field solenoid

Answer 11

increase n/l

increase current

Question 12

What is induced?

Answer 12

voltage

! only results in current when closed circuit

Question 13

how do generators transform energy

Answer 13

mechanical energy in electrical output