lesson 4 - using electromagnets Flashcards
1
Q
when the switch is closed:
A
the current flows / turns on electromagnet / striker hits gong
2
Q
which way does the bell go : ding - dong or dong - ding
A
ding - dong
3
Q
why is an electromagnet stronger when a piece of iron is inserted in the coil.
A
domains in the iron coil align / makes the affect stronger.
4
Q
suggest one way in which the electromagnet could be made stronger.
A
more coils / use more current
