Strength of a magnetic field
of a solenoid can be increased by:

 

Dorling Kindersley Books


1) Increasing or decreasing the number of turns? (of wire)

 

 

Increasing

 


2) Increasing or decreasing current?

 

 

Increasing

 


3) inserting a highly permeable core (increases flux density)

 

high permeable cores 

 

- Nickel, Iron, Cobalt,

 

These materials tighten existing flux lines, do not increase # of flux lines

 

Drag each metal to the magnet

[ Flash ]

Identify the low permeable materials

 

 

low permeable cores

 

 - air (Pulling out the core)

 

 

 

 

 


Flux Lines
2 Magnets

 

 

 

 

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