Edexcel A Level Physics:復習筆記3.16 Internal Resistance
Internal Resistance All power supplies have some resistance between their terminals This is called?internal resistance?(r) Internal resistance causes some electrical energy to be transformed...
Edexcel A Level Physics:復習筆記3.15 Electromotive Force
Electromotive Force When charge passes through a power supply such as a battery, it?gains?electrical energy The?electromotive force (e.m.f.)?is defined as: The amount of chemical energy converted t...
Edexcel A Level Physics:復習筆記3.14 Potential Dividers & Variable Resistance
Potential Dividers & Variable Resistance The Potentiometer A potentiometer is a single component which can act as a potential divider. It consists of a coil of wire with a sliding contact A var...
Edexcel A Level Physics:復習筆記3.13 Potential Dividers
Potential Dividers The electrical voltages rule is defined as: The sum of the e.m.f.s in a closed circuit loop is equal to the sum of the potential differences around that loop Therefore, wh...
Edexcel A Level Physics:復習筆記3.12 Potential Difference & Conductor Length
Potential Difference & Conductor Length Potential Difference A cell makes one end of the circuit positive and the other negative. This sets up a?potential difference?across the circuit The pote...
A-Level經濟和商務有何不同，應該如何選？
A-Level 商務（Business Management）和A-Level 經濟（Economy）都是商科方向的課程。于是有很多學生會在選課階段對著兩門課程糾結不已，不知道究竟該選擇哪門課程。事實上，雖然A-Level 商務（Business Manageme...
2023年大陸AP考試報名即將截止，為什么要參加AP考試？
9月19日，美國大學理事會College Board?宣布大陸2023年AP考試報名正式開啟。在2022-23學年，大學理事會繼續與Prometric合作管理國內的AP考試報名和考務工作。 美國大學先修課程(Advanced Placement)，簡稱AP課程...
Edexcel A Level Physics:復習筆記3.11 Current & Drift Velocity
Calculating Current & Drift Velocity Drift Velocity In a conductor, the current is due to the movement of charge carriers The charge carriers can be negative or positive However current ...
Edexcel A Level Physics:復習筆記3.10 Core Practical 2: Investigating Resistivity
Core Practical 2: Investigating Resistivity Aims of the Experiment The aim of the experiment is to determine the resistivity of a length of wire Variables Independent variable?= Length,?L,?of the w...
