CIE A Level Physics復習筆記20.2.1 Magnetic Flux
Magnetic Flux Definition Electromagnetic induction is when an?e.m.f?is induced in a closed circuit conductor due to it moving through a?magnetic field This happens when a conductor?cuts?through mag...
CIE A Level Physics復習筆記20.1.11 Forces between Current-Carrying Conductors
Origin of the Forces Between Current-Carrying Conductors A current carrying conductor, such as a wire, produces a?magnetic field?around it The direction of the field depends on the direction of the...
CIE A Level Physics復習筆記20.1.10 Magnetic Fields in Wires, Coils & Solenoids
Magnetic Fields in Wires, Coils & Solenoids Magnetic field?patterns are not only observed around bar magnets, magnetic fields are formed wherever current is flowing, such as in: Long straight w...
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...
