IB DP Physics: HL復習筆記5.2.4 I-V Characteristics
Ohm's Law Ohm's law states that: For a conductor at a constant temperature, the?current?through it is?proportional to the?potential difference?across it An electrical component obeys Ohm’s law if i...
IB DP Physics: HL復習筆記5.2.3 Kirchhoff’s Circuit Laws
Kirchhoff's Circuit Laws Kirchhoff's First Law Kirchhoff’s first law states that: The sum of the?currents?entering a junction always equals the sum of the currents out of the junction A?junction is...
IB DP Physics: HL復習筆記5.2.2 Resistance & Resistors
Resistance As?electrons move through the metal wire of a circuit (or any other component), they transfer some of their electrical potential energy to the positive ions of the metal Free electrons c...
IB DP Physics: HL復習筆記5.2.1 Circuits
Circuit Diagrams The diagram below shows the various circuit symbols that could be used in circuit diagrams Common circuit symbols Functions of Most Common Components Switch:?it turns the circuit o...
IB DP Physics: HL復習筆記5.1.5 Coulomb’s Law
Coulomb's Law Any charged particle generates an electric field This field exerts a force on any other charged particle within range The electrostatic force between two charges is defined by?Coulomb...
IB DP Physics: HL復習筆記5.1.4 Electric Fields
Electric Fields An?electric field?is a region of space in which an electric charge “feels” a force It is a?vector?field The direction of the electric field is the same as the direction of the elect...
IB DP Physics: HL復習筆記5.1.3 Potential Difference & DC
Potential Difference Potential difference is a measure of the electrical potential energy transferred from an electron as it moves between two points in a conductor Potential difference is work don...
IB DP Physics: HL復習筆記5.1.2 Drift Speed
Drift Speed In conductors, only negatively charged (delocalised) electrons are allowed to move between atoms In general, an electric current can arise from the flow of either positive or negative p...
IB DP Physics: HL復習筆記5.1.1 Charge & Current
Charge Charge is measured in?coulombs?(C). One coulomb is defined as: The charge carried by an electric current of one ampere in one second? Charge is a?scalar?quantity Electrons?have a?negative ch...
