BRAINCAKEMagnetic Fields
Revision notes for Magnetic Fields in AQA Physics (7408). Read the start of any lesson here, then sign in free for the whole lesson, the R.E.C.I.P.E. recall steps and the quiz.
- Magnetic FieldA magnetic field is a field of force surrounding a magnet or a current carrying wire or conductor.
- Force on a current-carrying wireA wire carrying a current experiences a force in an external magnetic field.
- Magnetic Flux densityThe strength of a magnetic field is also known as the magnetic flux density and is given the symbol B.
- Couple on a coil in a magnetic fieldIf a current carrying coil is placed in a magnetic field a pair of forces act on the sides of the coil.
- An Electric MotorAn electric motor is a coil of insulated wire in a magnetic field with a direct current passing through it.
- Force on a moving Charge in a Magnetic FieldCurrent is the flow of charge.
- CyclotronThe cyclotron is a device used to provide high energy beams for particle accelerators used in research and in hospitals for radiation therapy.
- The Mass SpectrometerThe mass spectrometer separates ions by mass using a velocity selector - a magnet and a pair of parallel plates with a high potential difference.