Edexcel IGCSE Physics 復習筆記 2.3.5 AC & DC
Edexcel IGCSE Physics 復習筆記 2.3.5 AC & DC AC & DC Direct Current A direct current (d.c.) is defined as A current that is steady, constantly flowing in the same direction in...
Edexcel IGCSE Physics 復習筆記 2.3.4 Electricity & Heat
Edexcel IGCSE Physics 復習筆記 2.3.4 Electricity & Heat Electricity & Heat When electricity passes through a component, such as a resistor, some of the electrical energy is turned in...
Edexcel IGCSE Physics 復習筆記 2.3.3 Electrical Safety
Edexcel IGCSE Physics 復習筆記 2.3.3 Electrical Safety Electrical Safety Mains electricity is potentially lethal Potential differences as small as 50 V can pose a serious hazard to individua...
Edexcel IGCSE Physics 復習筆記 2.3.2 Calculating Energy Transfers
Edexcel IGCSE Physics 復習筆記 2.3.2 Calculating Energy Transfers Calculating Energy Transfers Work?is done when charge flows through a circuit Work done is equal to the?energy transferred &...
Edexcel IGCSE Physics 復習筆記 2.3.1 Electrical Power & Fuses
Edexcel IGCSE Physics 復習筆記 2.3.1 Electrical Power & Fuses Electrical Power Power is defined as The rate of energy transfer or the amount of energy transferred per second  ...
Edexcel IGCSE Physics 復習筆記 2.2.5 Electrical Components
Edexcel IGCSE Physics 復習筆記 2.2.5 Electrical Components Thermistors & LDRs Thermistors A thermistor is a temperature-dependent resistor It is represented by the following circuit symbol: The...
Edexcel IGCSE Physics 復習筆記 2.2.4 IV Graphs
Edexcel IGCSE Physics 復習筆記 2.2.4 IV Graphs IV Graphs As the potential difference across a component is increased, the current also increases This is because potential difference and curr...
Edexcel IGCSE Physics 復習筆記 2.2.3 Resistors in Series
Edexcel IGCSE Physics 復習筆記 2.2.3 Resistors in Series Resistors in Series When two or more resistors are connected in series, the?total?(or?combined)?resistance?is equal to the?sum?of the...
Edexcel IGCSE Physics 復習筆記 2.2.2 Voltage in Series & Parallel
Edexcel IGCSE Physics 復習筆記 2.2.2 Voltage in Series & Parallel Voltage in Series & Parallel In a series circuit: The?current?is the?same?at all points ie. through each component T...
