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...
2022年NEC全美經濟學挑戰賽報名已開啟，哪些學生適合參加NEC？
NEC全美經濟挑戰賽火熱報名中，作為為數不多的經濟商科方向可選高中國際學術活動，NEC是千萬不能錯過的高價值學術活動！ NEC全美經濟挑戰賽介紹 全美經濟學挑戰賽?(National Economics Challenge) 是美國最具影響...
光華劍橋2022春招考試即日起可預報名！
十月，是招生的黃金季，相信在接下來的一兩個月內，2023擇校大戲將進入高潮期，提前了解考試流程及內容，才能更加從容地面對春招大戰。 而最新消息顯示，光華劍橋2023年春季班招生考試將于2022年10月30日周日上午...
Edexcel A Level Physics:復習筆記3.9 Electrical Resistivity
Electrical Resistivity All materials have some?resistance?to the flow of charge As?free?electrons?move?through a metal wire, they collide with ions which get in their way As a result, they?t...
Edexcel A Level Physics:復習筆記3.8 Current-Potential Difference Graphs
Current-Potential Difference Graphs As the potential difference (voltage) across a component is increased, the current also increases (by?Ohm’s law) The precise relationship between voltage ...
Edexcel A Level Physics:復習筆記3.7 Electrical Power
Electrical Power Work is also defined as a transfer of energy When components transfer electrical energy to other stores, work must be done because energy is transferred Therefore,?potential differ...
Edexcel A Level Physics:復習筆記3.6 Resistance in Series & Parallel
Deriving Equations for Resistance in Series & Parallel Resistors In Series When two or more components are connected in series: The combined resistance of the components is equal to the sum of ...
Edexcel A Level Physics:復習筆記3.5 Energy Conservation in Circuits
Energy Conservation in Circuits The Electrical Voltages Rule (Kirchhoff's Second Law) Energy is never used up or lost in a circuit, since everything follows the Law of Conservation of Energy The el...
Edexcel A Level Physics:復習筆記3.4 Charge Conservation in Circuits
Charge Conservation in Circuits The Electric Current Rule (Kirchhoff's First Law) The electric current rule is defined as: The algebraic sum of the currents entering and leaving a junction is equal...
Edexcel A Level Physics:復習筆記3.3 Ohm's Law
Defining Resistance Resistance Resistance is defined as the?opposition?to current It is further defined by Ohm's Law, which says that the resistance of a conductor is given by the ratio of p...
Edexcel A Level Physics:復習筆記3.2 Potential Difference
Potential Difference Potential Difference A cell makes one end of the circuit positive and the other negative This sets up a?potential difference?across the circuit This is sometimes known as the?v...
