IB DP Physics: HL復習筆記11.2.1 AC Generators
AC Generators If a coil of wire is rotated inside a magnetic field by an external force, an emf will be generated in the wire which causes current to flow within the coil The?generator effect?can b...
IB DP Physics: HL復習筆記11.1.4 Lenz’s Law
Lenz's Law Lenz’s Law is used to predict the?direction?of an induced e.m.f in a coil or wire Lenz's Law is summarised below: The induced e.m.f is set up in a direction to produce effects that oppos...
IB DP Physics: HL復習筆記11.1.2 Induced Emf
Induced Emf Electromagnetic induction is a phenomenon which occurs when an?e.m.f.?is induced when a conductor moves through a magnetic field When the conductor cuts through the magnetic field lines...
IB DP Physics: HL復習筆記11.1.1 Emf, Magnetic Flux & Magnetic Flux Linkage
Emf, Magnetic Flux & Magnetic Flux Linkage Electromagnetic Induction When a conducting wire moves through a magnetic field, a?potential difference?is created along the wire If the wire is part ...
IB DP Physics: HL復習筆記10.2.8 Forces on Charges & Masses
Forces on Charges & Masses The electric field strength equation can be rearranged for the force?F?on a charge?Q?in an electric field?E: Where: F = electrostatic force on the charge (N) Q = char...
IB DP Physics: HL復習筆記10.2.7 Forces & Inverse-Square Law Behaviour
Forces & Inverse-Square Law Behaviour The gravitational force between two bodies outside a uniform field (for example, between the Earth and the Sun) is defined by Newton’s Law of Gravitation w...
IB DP Physics: HL復習筆記10.2.6 Orbital Motion, Speed & Energy
Orbital Motion, Speed & Energy Since most planets and satellites have a near circular orbit, the gravitational force?FG?between the sun or another planet provides the?centripetal force?needed t...
IB DP Physics: HL復習筆記10.2.5 Escape Speed
Escape Speed To escape a gravitational field, a mass must travel at the?escape velocity This is dependent on the mass and radius of the object creating the gravitational field, such as a planet, a ...
IB DP Physics: HL復習筆記10.2.4 Potential in a Charged Sphere
Potential in a Charged Sphere The?electric potential?in the field due to a?point charge?is defined as:Where: V?= the electric potential (V) Q?= the point charge producing the potential (C) ε0?=?per...
