4.14.1

Magnetic Field Strength

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Magnetic Field Strength

The closer together magnetic field lines are, the stronger the magnetic field.

Illustrative background for For a straight wireIllustrative background for For a straight wire ?? "content

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.
Illustrative background for Changing the magnetic fieldIllustrative background for Changing the magnetic field ?? "content

Changing the magnetic field

  • For both solenoids and straight wires, increasing the size of the current increases the strength of the magnetic field, and flipping the direction of the current flips the direction of the magnetic field lines.

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1Motion, Forces & Energy

1.1Physical Quantities & Measurement Techniques

1.2Motion

1.3Mass & Weight

1.4Density

1.5Forces: Effects of Forces

1.6Forces: Turning Effects of Forces

1.7Forces: Centre of Gravity

1.8Momentum

1.9Energy, Work, & Power: Energy

1.10Energy, Work & Power: Work

1.11Energy, Work & Power: Energy Resources

1.12Energy, Work & Power: Power

1.13Pressure

2Thermal Physics

3Waves

4Electricity & Magnetism

4.1Simple Phenomena of Magnetism

4.2Electrical Quantities: Electric Charge

4.3Electrical Quantities: Electric Current

4.4Electromotive Force & Potential Difference

4.5Electrical Quantities: Resistance

4.6Electrical Energy & Electrical Power

4.7Electric Circuits: Circuit Diagrams & Components

4.8Electric Circuits: Series & Parallel Circuits

4.9Electric Circuits: Action & Use

4.10Electrical Safety

4.11Electromagnetic Effects: Electromagnetic Induction

4.12Electromagnetic Effects: The A.C. Generator

4.13Magnetic Effect of a Current

4.14Force on a Current-Carrying Conductor

4.15Electromagnetic Effects: The D.C. Motor

4.16Electromagnetic Effects: The Transformer

5Nuclear Physics

6Space Physics

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