BRAINCAKEMagnetic Fields
Revision notes for Magnetic Fields in OCR Physics A (H556). 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.