The crank on it formed a generator and the field in the bell coil made it ring.
They used to.... Modern phones don't usually.
It is used for the soundwaves that come out of the ear piece :)
There are magnets in the handset. The one in the microphone converts your voice to an electrical signal, and the one in the earpiece converts electrical signals back into sound.
Industrial Electromagnets Use higher quality metals for the coil winding. Also the windings are of different design and there are more of them. The metals used for the conductor are also of better quality material and have greater voltage sent to them.
Both use electricity and radio waves to communicate.
You dial a phone number and hit talk or send.
Yes, people still use the 411 telephone directory. It is mainly used by the older generation who find technology intimidating and it's a great alternative for them.
Electromagnets are never used to increase or decrease the voltage in a circuit. These magnets in conjunction with a rotating device (an armature) can create a voltage but the do not have any effect on a voltage.
no there is no use of electromagnets in iron box
CAT Scan does not use electromagnets, its MRI (Magnetic Resonance Imaging) which uses Electromagnets to produce images of the patient's body.
no
Inside of electric motors are electromagnets and permanent magnets. In a metal junk yard large electromagnets are used to pick up metal. In MRI's large electromagnets are used for imaging.
Electromagnets are used in many ways. Televisions use electromagnets to direct the electron beam, whereas loudspeakers and earphones use electromagnets to push the diaphragm forwards.
yes
the window of the car
Electromagnets are primarily used to produce electricity Any large scale facility with lots of instruments will definitely have electromagnets in it. Generators in the powerhouse uses big electromagnets to produce AC voltage which is then transported for the commercial or residential use.
The ancient Greeks understood magnets but since they did not have a source of electricity, they did not use electromagnets. They did make compasses.
No. compasses use a complex spinner.
Since electromagnets are used in most large electric motors,the answer is almost all industry.
Electromagnets are stronger and weigh far less than permanent magnets.