IB DP Physics: SL復(fù)習(xí)筆記5.2.5 Resistivity
Resistivity Resistance, Length and Cross-Sectional Area The?resistance?of a sample depends on: The material it is made of The length of the sample The cross-sectional area of the sample The resista...
IB DP Physics: SL復(fù)習(xí)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: SL復(fù)習(xí)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: SL復(fù)習(xí)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: SL復(fù)習(xí)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...
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每年的8月1號(hào)，對于美本申請的同學(xué)們意義重大的日子：轟轟烈烈的申請季戰(zhàn)打響了——Common App開放申請！ Common App簡介 Common App全稱Common Application，簡稱CA。Common App申請系統(tǒng)的最大特點(diǎn)是，申請人只需...
IB DP Physics: SL復(fù)習(xí)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: SL復(fù)習(xí)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: SL復(fù)習(xí)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: SL復(fù)習(xí)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: SL復(fù)習(xí)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 cha...
IB DP Physics: SL復(fù)習(xí)筆記4.5.4 Harmonics
Harmonics Stationary waves can have different wave patterns, known as?harmonics These depend on the?frequency?of the vibration and the?boundary conditions?(i.e. fixed and/or free ends) The harmonic...
