Electromagnetism
Study of
electromagnetic force
Electricity and
magnets are closely related to each
other . Electricity can produce
magnets while
magnets can
produce electricity.
Magnet
Usually made of iron .
Can attract
objects such as
pins, coins, and
other materials
made of iron and steel.
A nail iron is not a magnet, but it can be turned into one.
This is done by coiling a wire around it and
letting electricity
flow through it.
An electromagnet attracts like a real magnet . it can
attract materials
made of metals like pins and thumbtacks . the iron nail acts as a magnet while
electricity is flowing
through the coil of
wire.
When electricity stops flowing through the coil to the nail , can the nail still attract the pin and the thumbtacks?
No, it can no longer attract the pin and the thumbtacks.
Electromagnets are temporary magnets . When electricity stops flowing through a coil f wires, the nail stops
attracting any metal or magnetic material.
Generators- in power plants rely on magnets like the ones found in
electric motors to produce electricity .
Write the word True if the statement is correct . If the statement is False , replace the underlined words to
make the statement true.
____1. An electromagnet may be produced by
making electricity flow
through a coil of wire
wound around an iron nail.
____2. When electricity stops flowing through a coil of wire, the nail
continues attracting any
metal or magnetic material.
____3. An electromagnet can be made stronger by using less coils of wire.
____4. The number of dry cells used affects the
magnetism of an magnetism of an
electromagnet . More dry cells mean less magnetism.
____5. Electromagnets are permanent magnets that
can attract any material or magnetic material.
