to produce sound
Yes, they are.
yes, electromagnetic wave is a radio wave
They are electromagnetic.
No difference at all. Radio waves are one of many types of electromagnetic waves.
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I'm not sure where a bar magnet is used, but an electromagnet is used in junkyards, and in some laboratories.
Electro Magnetic is correct
Electromagnets are widely used now. Instead of traditional magnets.
A compass can be used to determine the direction of the magnetic field in an electromagnet. The needle of the compass will align along the direction of the magnetic field lines produced by the electromagnet.
An electromagnet can attract the metal, leaving the plastic behind.An electromagnet can attract the metal, leaving the plastic behind.An electromagnet can attract the metal, leaving the plastic behind.An electromagnet can attract the metal, leaving the plastic behind.
The strength of an electromagnet is proportional to the number of turns in the coil, the amount of current flowing through the coil, and the magnetic permeability of the core material used in the electromagnet. Increasing any of these factors will increase the strength of the electromagnet.
Light and heat are very helpful to human beings, and radio has become pretty important too.