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Edexcel A Level Physics:復習筆記3.7 Electrical Power

2022-10-09

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

2022-10-09

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

2022-10-09

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

2022-10-09

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

2022-10-09

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

2022-10-09

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...

Edexcel A Level Physics:復習筆記3.1 Electric Current

2022-10-09

Electric Current Electric Current Electric current is defined as: The rate of flow of charge It is measured in units of?amperes (A)?or?amps The charge, current and time are related by the equation:...