AQA A Level Physics复习笔记7.8.3 Magnetic Flux Density
Magnetic Flux Density Definition The magnetic flux density B is defined as: The force acting per unit current per unit length on a current-carrying conductor placed perpendicular to the magn...
AQA A Level Physics复习笔记7.8.2 Fleming's Left Hand Rule
Fleming's Left Hand Rule The direction of the force on a charge moving in a magnetic field is determined by the direction of the magnetic field and the current Recall that the direction of t...
AQA A Level Physics复习笔记7.8.1 Magnetic Force on a Current-Carrying Conductor
Magnetic Force on a Current-Carrying Conductor A current-carrying conductor produces its own magnetic field When interacting with an external magnetic field, it will experience a force  ...
A-level生物必须要掌握的数学技能及知识点！
A-level生物有两大难点，一是知识太多太杂，需要记忆的内容很多，二是生物涉及的数学部分，也让很多数学底子不太好的同学感到头疼。今天就一起来看看学习A-level生物必须要掌握的数学技能及知识点！ A-level生物...
AQA A Level Physics复习笔记7.7.4 Required Practical: Charging & Discharging Capacitors
Required Practical: Charging & Discharging Capacitors Aim of the Experiment The overall aim of this experiment is to calculate the capacitance of a capacitor. This is just one example of...
AQA A Level Physics复习笔记7.7.3 Charge & Discharge Equations
Capacitor Discharge Equation The time constant is used in the exponential decay equations for the current, charge or potential difference (p.d) for a capacitor discharging through a resistor...
AQA A Level Physics复习笔记7.7.2 The Time Constant
The Time Constant The time constant of a capacitor discharging through a resistor is a measure of how long it takes for the capacitor to discharge The definition of the time constant is: The...
AQA A Level Physics复习笔记7.7.1 Charge & Discharge Graphs
Capacitor Charge & Discharge Graphs Charging Capacitors are charged by a power supply (eg. a battery) When charging, the electrons are pulled from the plate connected to the positive ter...
AQA A Level Physics复习笔记7.6.3 Energy Stored by a Capacitor
Energy Stored by a Capacitor When charging a capacitor, the power supply pushes electrons from the positive to the negative plate It therefore does work on the electrons and electrical energ...
