Physics Course/Electromagnetism/ElectroMagnet/Coil of several Turns

ElectroMagnet/Coil of several Turns edit

When a coil of several turns is connected with Electric source, Magnetic Field exist and has the same form as Magnetic Field of Natural Magnet. Current conducting Coil of several turns generates Electromagnetic Field of expanding Elliptical lines.

 

Characteristics of Electromagnets edit

Magnetic Poles edit

The polarities of the electric source form a Magnetic Pole. The Positive Terminal corresponds to North Pole and Negative Terminal corresponds to South Pole.

Magnetic Field edit

Magnetic Field is made up from Expanding Magnetic Field Lines running from North Pole to South Pole. The Magnetic Field Strength is directly proportional to Current in the coil and the inductance of the coil and can be calculated by mathematical formula

B = L I

Where

I is Current measured in Ampere
L is Inductance measured in Henri

Magnetic Field Force edit

The Magnetic Field Force is directly proportional to Magnetic Field Strength and the length of the Magnetic Field Line and can be calculated by mathematical formula

F = B l

Magnetic Voltage Induction edit

Magnetic Voltage Induction on a Coil

 
 
 

Change of Magnetic Field strength is proportional to Inductance of the coil and change in Current flow through the coil


Magnetic Voltage Induction on a Coil's Turn

 
 
 

Change of Magnetic Flux strength is proportional to Inductance of the turns and change in Magnetic Flux through the coil