7.2.3

Magnetic Field Strength

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Magnetic Field Strength

The closer together magnetic field lines are, the stronger the magnetic field. Coiling wire around an iron core increases the amount of wire over a shorter distance and all the magnetic field lines are in the same direction.

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For a straight wire

  • For a straight wire carrying a current, the magnetic field is strongest at the points closest to the wire, and weakest further away from the wire.
Illustrative background for For a coil of wire (solenoid)Illustrative background for For a coil of wire (solenoid) ?? "content

For a coil of wire (solenoid)

  • For a solenoid (coil of wire), the magnetic field inside the solenoid is strong and uniform.
  • Outside of the solenoid the magnetic field decreases in strength the further away it is from the solenoid.

Jump to other topics

1Energy

2Electricity

3Particle Model of Matter

4Atoms & Radiation

5Forces

5.1Basics of Motion

5.2Forces

5.3Effects of Forces

5.4Pressure

6Waves

7Magnetism

8Astrophysics

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