📚 Year 11 WJEC Physics: Complete Syllabus Breakdown | 11年级WJEC物理：课程大纲全面解析
Welcome to your ultimate guide for mastering the Year 11 WJEC GCSE Physics syllabus. This article breaks down every major topic, key equations, and essential concepts you need to succeed in your exams. Whether you are studying single Physics or the Physics component of Double Award Science, this comprehensive overview will help you structure your revision effectively and build deep understanding of the course.
欢迎阅读11年级WJEC GCSE物理课程大纲的全方位解析。本文梳理了所有重要主题、关键方程和核心概念，助你在考试中脱颖而出。无论你是修读单独物理课程还是双奖科学中的物理部分，这份全面概览都将帮你高效规划复习，并深入理解整个课程体系。
1. Course Structure & Exam Format | 课程结构与考试形式
The WJEC GCSE Physics qualification (first teaching from 2016) is divided into two examined units and a practical assessment. Unit 1 is titled 'Electricity, Energy and Waves', while Unit 2 is 'Forces, Space and Radioactivity'. Both written papers are 1 hour 45 minutes in duration and account for 45% of the final grade each, making the total written examination contribution 90%.
WJEC GCSE物理资格（自2016年起首次教学）分为两个笔试单元和一个实践评估。第一单元名为“电学、能量与波”，第二单元为“力、空间与放射性”。每份笔试卷时长为1小时45分钟，各占总成绩的45%，因此笔试总贡献为90%。
The remaining 10% is derived from a practical skills unit, which is internally assessed by your teacher. This involves completing specified practical tasks (SPTs) throughout the course, where you will collect data, analyse results, and draw conclusions. The exams will also contain questions on these practicals, so understanding the methods is crucial. Grades are awarded on the 9–1 scale, with 9 being the highest.
剩余10%来自实践技能单元，由你的老师进行校内评估。这需要你在课程期间完成指定的实验任务（SPTs），包括收集数据、分析结果并得出结论。考试中也会出现与这些实验相关的问题，因此理解实验方法至关重要。成绩按9-1等级评定，9为最高。
2. Energy & Energy Transfers | 能量与能量转换
Energy is a central theme in WJEC Physics. It is stored in a range of ‘energy stores’ – kinetic, thermal, chemical, gravitational potential, elastic potential, magnetic, electrostatic and nuclear. When energy is transferred, it moves from one store to another via four main pathways: mechanical work done by a force, electrical work done by moving charges, heating, or radiation (including light and sound).
能量是WJEC物理的核心主题。它储存在一系列“能量储存库”中——动能、热能、化学能、重力势能、弹性势能、磁能、静电势能和核能。当能量发生转移时，它会从一种储存库转移到另一种，主要通过四种路径：力做的机械功、移动电荷做的电功、加热以及辐射（包括光和声）。
A closed system is one where no energy enters or leaves the net total. The principle of conservation of energy states that energy can neither be created nor destroyed, only transferred usefully, wasted or dissipated into the thermal store of surroundings. Understanding dissipation and how reducing unwanted energy transfers improves efficiency is key.
一个封闭系统是指没有能量进出净总值的系统。能量守恒定律指出，能量既不能凭空产生也不能凭空消失，只能被有用转移、浪费或耗散到周围的热能储存库中。理解耗散以及减少不必要能量转移如何提升效率是关键。
| Energy Store | Description |
|---|---|
| Kinetic | Energy of a moving object |
| Gravitational Potential | Energy due to height in a gravitational field |
| Elastic Potential | Energy stored when an object is stretched or compressed |
| Thermal (Internal) | Total kinetic and potential energy of particles in a substance |
| 能量储存 | 描述 |
|---|---|
| 动能 | 运动物体具有的能量 |
| 重力势能 | 物体因处于引力场中高处而具有的能量 |
| 弹性势能 | 物体被拉伸或压缩时储存的能量 |
| 热能（内能） | 物质内所有粒子动能与势能的总和 |
You must be able to calculate changes in energy using the following equations. Kinetic energy is given by:
你必须能够用以下方程计算能量变化。动能由下式给出：
Ek = ½ m v²
where m is mass (kg) and v is speed (m/s). Gravitational potential energy:
其中m为质量（千克），v为速度（米/秒）。重力势能：
Ep = m g h
cy is calculated as useful output energy transfer divided by total input energy transfer, and can be expressed as a percentage.
其中g = 10 N/kg或9.8 N/kg（按题目给定）。力所做的功W = F d，功率定义为P = E / t 或 P = W / t。效率计算为有用输出能量转移除以总输入能量转移，可以用百分比表示。
3. Electricity & Circuits | 电学与电路
s, diodes, LEDs, fuses, voltmeters, ammeters, thermistors and LDRs. Current is the rate of flow of charge: I = ΔQ / Δt. In a series circuit, current is the same everywhere; in a parallel circuit, the current splits across branches.
电路是第一单元的基础。你需要掌握标准电路符号，包括电池、电阻器、可变电阻器、灯泡、二极管、发光二极管、保险丝、电压表、电流表、热敏电阻和光敏电阻。电流是电荷的流动速率：I = ΔQ / Δt。在串联电路中，各处电流相同；在并联电路中，电流在各支路中分流。
it charge: V = W / Q. Resistance is defined by R = V / I, and its unit is the ohm (Ω). Ohm' ture, current is directly proportional to potential difference. You will investigate the I–V characteristics of ohmic conductors, filament lamps and diodes in your practical work.
电势差（电压）是每单位电荷转移的能量：V = W / Q。电阻定义为R = V / I，单位为欧姆（Ω）。欧姆定律指出，对于恒温下的电阻器，电流与电势差成正比。你将在实验工作中探究欧姆导体、白炽灯和二极管的I–V特性曲线。
For resistors in series, the total resistance is Rtotal = R₁ + R₂ + ... For resistors in parallel, the total resistance is found using 1/Rtotal city is 230 V, 50 Hz AC. The live wire alternates between high potential and low; the neutral wire completes the circuit; and the earth wire is a safety feature. Fuses and circuit breakers prevent overheating.
对于串联电阻，总电阻为Rtotal = R₁ + R₂ + … 对于并联电阻，总电阻使用1/Rtotal = 1/R₁ + 1/R₂计算。在英国，市电为230 V、50 Hz交流电。火线在高电位和低电位间交替变化；零线构成电路回路；地线则是一项安全措施。保险丝和断路器可防止过热。
y transferred is E = P t, measured in joules. Electricity meters record energy in kilowatt‑hours (kW h). One unit is 1 kW h = 3.6 × 10⁶ J.
电器的功率由P = I V和P = I² R给出。转移的能量为E = P t，以焦耳为单位。电表以千瓦时（kW h）记录电能。1度电为1 kW h = 3.6 × 10⁶ J。
4. Properties of Waves & The Electromagnetic Spectrum | 波的性质与电磁波谱
Waves transfer energy without transferring matter. There are two main types: transverse and longitudinal. In transverse waves (e.g., light, water ripples, all EM waves), the oscillations are perpendicular to the direction of energy transfer. In longitudinal waves (e.g., sound, ultrasound, seismic P‑waves), the oscillations are parallel. You must be able to label amplitude, wavelength, crest, trough, compression and rarefaction.
波在不传递物质的情况下转移能量。波有两种主要类型：横波和纵波。在横波（如光、水波、所有电磁波）中，振动方向与能量传递方向垂直。在纵波（如声波、超声波、地震P波）中，振动方向与传播方向平行。你必须能够标注振幅、波长、波峰、波谷、稀疏和稠密。
gnetic waves travel at the same speed in a vacuum, 3.0 × 10⁸ m/s. The electromagnetic spectrum, in order of decreasing wavelength (increasing frequency), is: radio, microwave, infrared, visible, ultraviolet, X‑rays, gamma rays. Each region has distinct properties and uses.
波动方程将波速、频率和波长联系起来：v = f λ。波速v单位为m/s，频率f单位为赫兹（Hz），波长λ单位为米。所有电磁波在真空中均以相同速度3.0 × 10⁸ m/s传播。电磁波谱按波长递减（频率递增）排列为：无线电波、微波、红外线、可见光、紫外线、X射线、伽马射线。每一区域都有独特的性质和用途。
You are expected to know uses such as: radio for communication, microwaves for satellite and cooking, infrared for heaters and remotes, UV for sunbeds and detecting forged banknotes, X‑rays for medical imaging, and gamma rays for sterilising medical equipment and treating cancer. Risks involve heating effects (microwaves), skin burns and cancer (UV, X‑rays, gamma rays) due to ionisation.
你需要掌握这些波的用途：无线电用于通信，微波用于卫星和烹饪，红外线用于加热器和遥控器，紫外线用于日光浴床和检验伪钞，X射线用于医学成像，伽马射线用于消毒医疗设备和治疗癌症。风险包括热效应（微波）、皮肤灼伤以及因电离作用而引发的癌症（紫外线、X射线、伽马射线）。
When a wave passes from one medium to another, it changes speed, causing refraction. If it is moving into a denser medium, it slows down and bends towards the normal. Reflection obeys the law: angle of incidence equals angle of reflection, measured from the normal. You should be able to construct ray diagrams for plane mirrors and refraction.
当波从一种介质进入另一种介质时，其速度发生变化，从而发生折射。若波进入更密介质，它会减速并向法线弯曲。反射遵循定律：入射角等于反射角，均从法线量起。你应该能够绘制平面镜反射和折射的光路图。
5. Forces & Motion | 力与运动
Forces are pushes or pulls, measured in newtons (N). They can be contact forces (e.g., friction, tension) or non‑contact forces (e.g., gravitational, magnetic). Scalar quantities have magnitude only; vectors have both magnitude and direction. Distance and speed are scalars; displacement and velocity are vectors.
力是推或拉，以牛顿（N）为单位。力可以是接触力（如摩擦力、张力）或非接触力（如引力、磁力）。标量只有大小，矢量既有大小又有方向。距离和速率是标量，位移和速度是矢量。
tance divided by time: v = s / t. Acceleration is change in velocity per unit time: a = (v – traight line, you can also use the equation v² = u² + 2 a s. You should interpret distance–time and velocity–time graphs: the gradient of a distance–time graph gives speed; the gradient of a velocity–time graph gives acceleration, and the area under the graph gives distance travelled.
速率由距离除以时间计算：v = s / t。加速度是单位时间内速度的变化量：a = (v – u) / t。对于直线上的匀加速运动，你还可以使用方程v² = u² + 2 a s。你应能解释距离–时间图和速度–时间图：距离–时间图的斜率表示速率；速度–时间图的斜率表示加速度，图下方的面积表示走过的距离。
Newton' object remains at rest or in uniform motion unless acted upon by a resultant force. Newton' g. The value of g on Earth is approximately 9.8 m/s² (or 10 m/s² in calculations). Newton's third law reminds us that forces occur in equal and opposite pairs.
牛顿第一定律指出，物体将保持静止或匀速直线运动状态，除非受到合力作用。牛顿第二定律给出关系F = m a。重量是引力作用：W = m g。地球上的g值约为9.8 m/s²（或计算中使用10 m/s²）。牛顿第三定律提醒我们，力以大小相等、方向相反的作用力与反作用力对形式出现。
Stopping distance is the sum of thinking distance and braking distance. Factors affecting it include speed, driver reaction time, road conditions, and vehicle mass/brake condition. You should be able to explain safety features like seat belts, air bags, and crumple zones in terms of increasing the time taken to stop, thereby reducing the rate of change of momentum.
停车距离等于反应距离与制动距离之和。影响停车距离的因素包括车速、驾驶员反应时间、路面状况以及车辆质量和制动状况。你应能解释安全带、安全气囊和溃缩区等安全装置的原理，即通过延长停止时间来减少动量变化率。
6. Momentum & Collisions | 动量与碰撞
mentum before a collision or explosion equals the total momentum afterwards. This is the principle of conservation of momentum.
动量是一个矢量，由质量与速度的乘积定义：p = m v。在封闭系统中，碰撞或爆炸前的总动量等于其后的总动量。这就是动量守恒定律。
ject, it changes its momentum. Force and rate of change of momentum are linked by F = (m v – m u) / t, which is an alternative statement of Newton' increasing the impact time reduces the force, as seen in air bags and cushioned surfaces.
当力作用于物体上时，会改变其动量。力与动量变化率通过F = (m v – m u) / t 联系，这是牛顿第二定律的另一种表述。这就解释了为何增加碰撞时间会减小作用力，如安全气囊和缓冲垫的应用。
You must be able to solve problems involving collisions where objects stick together (inelastic) or bounce apart (elastic). In an elastic collision, both momentum and kinetic energy are conserved, but most everyday collisions are inelastic, with some kinetic energy converted to thermal energy and sound.
你必须能解决涉及物体碰撞后粘合（非弹性）或弹开（弹性）的问题。在弹性碰撞中，动量和动能都守恒，但大多数日常碰撞是非弹性的，部分动能转化为热能和声能。
7. Stars & The Universe | 恒星与宇宙
he life cycle of a star depends on its initial mass. Stars like the Sun evolve from nebula → protostar → main sequence → red giant → planetary nebula → white dwarf. More massive stars follow: nebula → main sequence → red supergiant → supernova → neutron star or black hole.
Published by TutorHao | Year 11 Physics Revision Series | aleveler.com
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