Revision of magnetism

04.01.2020
09:36:35
Dear students, good morning
Today we will revise the remaining concepts in magnetism .pg.no :168 to 170
The concept : making an electromagnet
The important points are:
1.An electromagnet is made of a coil of wire in which an electric current flows.
2.We can make a strong electromagnet by
* Adding an iron core
*Adding more turns of wire
* Increasing the electric current in the coil.
3.Ammeter is used to measure electric current.unit :amps or A
No homework