CIE A Level Physics復習筆記20.1.9 Velocity Selection
Velocity Selection A velocity selector is defined as: A device consisting of perpendicular electric and magnetic fields where charged particles with a specific velocity can be filtered Velocity sel...
CIE A Level Physics復習筆記20.1.8 Motion of a Charged Particle in a Magnetic Field
Motion of a Charged Particle in a Uniform Magnetic Field A charged particle in uniform?magnetic field?which is perpendicular to its direction of motion travels in a?circular?path This is because th...
CIE A Level Physics復習筆記20.1.7 Using a Hall Probe
Measuring Magnetic Flux Density using a Hall Probe A Hall probe can be used to measure the?magnetic flux density?between two magnets based on the Hall effect It consists of a cylinder with a flat s...
CIE A Level Physics復習筆記20.1.6 Hall Voltage
Hall Voltage The Hall voltage is a product of the Hall effect Hall voltage is defined as: The potential difference produced across an electrical conductor when an external magnetic field is applied...
CIE A Level Physics復習筆記20.1.5 Force on a Moving Charge
Calculating Magnetic Force on a Moving Charge The magnetic force on an isolating moving charge, such an electron, is given by the equation: F = BQv sinθ Where: F = force on the charge (N) B =?magne...
CIE A Level Physics復習筆記20.1.4 Magnetic Flux Density
Magnetic Flux Density Definition The magnetic flux density?B?is defined as: The force acting per unit current per unit length on a current-carrying conductor placed perpendicular to the magnetic fi...
CIE A Level Physics復習筆記20.1.3 Fleming's Left-Hand Rule
Fleming's Left-Hand Rule The?direction?of the force on a charge moving in a?magnetic field?is determined by the direction of the magnetic field and the current Recall that the direction of the curr...
CIE A Level Physics復習筆記20.1.2 Force on a Current-Carrying Conductor
Force on a Current-Carrying Conductor A current-carrying conductor produces its own?magnetic field When interacting with an external magnetic field, it will experience a?force A current-carrying co...
CIE A Level Physics復習筆記20.1.1 Representing Magnetic Fields
Magnetic Field Definition A magnetic field is a?field of force?that is created either by: Moving?electric charge Permanent?magnets Permanent magnets are materials that produce a magnetic field A st...
