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How can you influence the performance of electromagnets? - Coggle Diagram
How can you influence the performance of electromagnets?
How can the performance of an electromagnet be defined as?
The performance of an electromagnet could be defined as a strength of a certain force
Magnetic field strength exerted by the electromagnet, SI units B and measured in Tesla
Magnetic force exerted by the electromagnet, SI unit N and measured in Newtons
It could also be defined as its efficiency
How efficient the electromagnet is as a magnetic conductor
What are the factors which affect the performance of electromagnets (assuming performance=strength of magnetic field)
Presence of a metal core
Every metal has its relative permeability, shown by symbol µ. The relative permeability of the metal is directly proportional to the amount of magnetic field within the electromagnet.
Since metals such as iron or neodymium have high relative permeability, they improve the performance of electromagnets at a great rate.
A greater surface area of the metal also enables a greater magnetic field strength, as more metal is within it.
Amount of current flowing through the electromagnet
Directly proportional; the greater the current flowing through the electromagnet, the greater the magnetic field produced by it
Number of loops in the electromagnet
Directly proportional; the more loops, the greater the magnetic field within the electromagnet
Length of the wire
Electromagnets have resistance to certain degree. This resistance can be decreased by increasing the length of the wire.
Therefore, it can be concluded that the length of the wire is directly proportional to the magnetic field produced by the electromagnet.
The relationship between the magnetic field exerted by the electromagnet and the factors affecting it are all directly proportional apart from the length of solenoid, in which is inversely proportional.
What types of practical can be performed? (What could be the independent variable?
Current
Length of wire
Type of metal core
Number of loops
Other variables
Dependent variables
Magnetic field strength of electromagnet
Force exerted by electromagnet
Controlled variables
The three other variables which affect the performance of electromagnets, such as the current, type of metal and length of solenoid if the independent variable is the number of loops.
Uncontrolled variables
Twisted or dented sections of wire in the solenoid which may affect the quality of the conductor