Question

A straight wire carrying a current acts like a magnet. Then why is a coil of a wire is used in an Electromagnet instead of just a straight wire? 

Also answer these questions --> 

• What's an electromagnet?
• Give three uses of electromagnet in daily life. 
• What's magnetic effect of electric current? 

Thanks! :) 

Answer 1

Hey


It is true that a straight wire carries magnetic effect .

This magnetic effect is created by :-

When there is a change in the position of current , then causes the magnetic effect .


Now your answers :-

• Electromagnet :- The magnet which is created by the movement of current in a conductor is known as Electromagnet .

This magnet is temporary , as it gets produced when there is flow of current .


• Three uses of electromagnet :-

>> In Television

>> In speakers

>> In mobiles


• Magnetic effect of electic current :-

The effect of magnet produced in a current carrying conductor , during the flow of electric current through a conductor , is know as magnetic effect od electric current .


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thanks :)

Answer 2

Hello!


Q. A straight wire carrying a current acts like a magnet. Then why is a coil of a wire is used in an Electromagnet instead of just a straight wire ?

=> Yes, a straight wire carrying a current acts like a magnet because currents also produce magnetic field.

Then,

A coil of a wire is used in an Electromagnet instead of just a straight wire because coil has many number of loops of wire and each loop of wire behave as a magnet. Each loop of wire is like a little magnet that has its own magnetic field , all loops together produce a strong magnetic field but a straight wire do not produce more magnetic field compare to coil of a wire that's why a coil of a wire used in an electromagnet instead of a straight wire.


• What's an electromagnet ?

=> An electromagnet is a coil of wire wrapped around an iron core. When an electric current flows through the coil , it creates a magnetic field. This produces temporary magnetism in the iron core. Thus , magnetism of current carrying coil and iron core together produces a strong magnetic field , when electric current stops , iron core is no longer magnetic and it doesn't behave like a magnet.

• Give three uses of electomagnet in daily life.

1 ) Electric bell ( It is used in electric bell , in schools and institutes ).

2 ) Radios and speakers ( It is used in radios and speakers , in home ).

3 ) Mobiles and smartphones ( It is used in mobiles and smartphones , in any place )

• What's magnetic effect of electric current ?

=> If we brought a compass near a current carrying conductor , needle of compass will be deflected because of flow of electricity , this is known as magnetic effect of electric current.

:-) Hope it helps !