Physics Talk

文憑試多了些甚麼 ?

I. Heat and Gases (25 hours):

II. Force and Motion (55 hours)a. Projectile motionb. Moment of a forcec. Conditions for equilibrium of forcesd. Uniform circular motione. Gravitation

F = GMm/r2

Gravitational field strengthDetermine the velocity of an object in a

circular orbit

III. Wave Motion (48 hours):

a. Stationary Waveb. Examine the interference patterns in the Young’s double slit experiment c. Examine the interference patterns in the transmission gratingd. lens formulaee. Sound intensity, dB

IV. Electricity and Magnetism (56 hours)a. Electric field

b. Electric Potentialc. Examine the magnetic field patterns associated with currents through a long straight wired. Examine the magnetic field patterns associated with currents through a circular coil e. Examine the magnetic field patterns associated with currents through a long solenoidf. Apply B = o1/2 r and B = o N I /l g. Force on a current-carrying wire F= BIl sin h. drift velocity of electron I = n A v Qi. Force on a moving charge F = B Q v sin j. derive Hall voltage VH = BI/nQt

IV. Electricity and Magnetism (56 hours)k. Examine magnetic fields using a Hall probe

l. define magnetic flux F = BA cos m. Faraday’s Law e = - F /tn. Search Coilo. structures of simple d.c. and a.c. generators and how they workp. discuss the occurrence and practical uses of eddy currents.q. define r.m.s. of an alternating current as the steady.d. r. relate the r.m.s. and peak values of an a.c.

V. Radioactivity and Nuclear Energy (16 hours)

a. represent the number of undecayed nuclei by the exponential law of decay N = No e –kt

b. relate the decay constant and the half-lifec. state mass-energy relationship E = m c2

d. use atomic mass unit as a unit of energye. determine the energy release in nuclear reactionsf. apply E = m c2 to solve problem (mole, avogadro’s number and mass of a mole are implied)

SBA

• Demands of Error treatment and Accuracy

課時

總建議 : 16+56+48+55+25 = 200 小時 (12000 分鐘 )或 300 課節 ( 以每小時 40 分鐘 ) 校本評核 :12 節 ( 每年６次，每次２節）其他： 10 節 (7 次大小測驗 ..)每年共需 22 節 ( 中四中五共需 44 節 ) 總節數 : 中四至中五 : 264 ( 以每年 24 循環周 , 中四 5 節 , 中五 6節 ) 中三： 21X2 = 42 節可上課節數 :264+42-44=262 節

選修科目

• 建議 ( 每科 27 小時 , 共 54 小時或 81 節 )• 中六節數 : 12 x 5 = 60 節• SBA : 2 節• 測驗 ..:4 節• 温書… ..?

課程之難處• 1. 授課節數不足• 2. 課程較會考深 , 廣又新• 3. 數學能力要求高• ( 中三數學以下之數學根基必須非常紥

實 )• + 向量 ( 或矢量 ) 之運算 ,• + 數學延伸課程之內容 ( 高度建議 )

授課理念及方法目標 : 以得可讓學生能跨入大學門檻之成績

授課理念 :a. 學生需長時間浸淫於物理學之較繁雜課題或概念方能完全明白 .b. 以中三課程涵蓋力學及電學較淺易及基本概念部份 .c. 公開試中 , 力學及電學較佔多數d. 除中三課程外 , 文憑試課程必修部作只餘兩個較淺之題目 : 基本熱學 , 光學e. 課本尚易明白，郤未顯示解題步驟，題目包括十年公開試題f. 課本內容涵蓋之例題未足令學生得佔優之成績（可達至Ｌ４）* 每一課題有淺易部份，亦有深奧部份，若將深奧部份留至中五後期或中六初期方教授，則需時重温中三至中四部份內容，而學生亦無較長時間浸淫在當中，恐怕難以準確地掌握概念。

S3 授課內容• Fundamental and basic concepts of Mechanics

are taught.• Fundamental and basic concepts of Current

Electricity are taught. • (The above concepts are developed

continuously from Students’ IS syllabus.)

S3 授課內容• Experiments and/or demonstration includes:1. Using stopwatch 2. Using stopwatch to measure time of flight of vertical motion3. Using ticker-tape timer4. Using ticker-tape timer to measure time and displacement and construct5. S-t graph6. v-t graph7. Demonstration of stroboscope8. Moment of force9. Measuring Period of Pendulum10.Using Spring balance to measuring force11.Using Spring to measure the mass of unknown object12.Using voltmeter and ammeter to measure resistance (Ohm’s Law)13.Using voltmeter to verify the p.d. and current of parallel circuit

S4• Prepare students’ mathematics skill, error

treatments and accuracy (1.5-2 months)• Revision of Mechanics, Projectile motion,

moment of force, Momentum, work, energy and Power, uniform circular motion and Gravitation

• CRO

S4• Experiments and/or demonstration includes:1. Demonstration of errors (systematic, instrumental and

random errors)1. Measuring length with ruler,2. Finding focal length of a convex lens

2. Demonstration of the relationship between force, mass and acceleration

3. Demonstration of action and reaction with two board trolleys

4. Demonstration of projectile motion with different objects

5. Demonstration of object in circular motion6. Demonstration and use of the CRO

S46 SBAs includes :1.Displacement and average speed2.Velocity and acceleration3.Gravitational acceleration4.Force and acceleration5.Momentum6.Centripetal force

S5

• Revisions of S3 current Electricity, Electricity and Magnetism + Electromagnetism

• Radioactivity and Nuclear Energy• Heat and Wave

S5•Experiments and/or demonstration includes:1.Demonstration of Electrostatics (Like charges repel and unlike charges attract)2.Using Electroscope to measure charges3.Using van de Graff generator to demonstrate

a) Windmillb) Standing hairc) Simulation of thunder storm (Sparks)d) Bouncing conducting sphere

4.Drawing magnetic field pattern5.Demonstration of magnetic field due to current carrying wire6.Demonstration of magnetic field due to coil7.Demonstration of magnetic field due to long solenoid8.Demonstration of force experience by current carrying wire in magnetic field9.Demonstration of electromagnet10.Investigation of the factors affecting electromagnet

S511. Generating power from cutting magnetic field with a wire12. Investigation of the factors affecting the electromagnetic

induction13. Demonstration of transmission line and loss of energy with D.C.14. Demonstration of Transformer15. Detection of Radioactive source using

a. Spark counterb. G-M tube and scalar-timer

16. Demonstration of the penetration power of radiations witha. Paperb. Aluminium platec. Lead plate

17. Nature of half life with dice

S5• 6 SBAs includes :

– The cathode ray Oscilloscope– Ohm’s Law– Potential difference of a supply delivering current– Electric Potential– Magnetic fields around electric current (I)– Magnetic fields around electric current (II)

• 3 SBAs in summer:– The law of electromagnetic induction– Investigating transformer action– Specific heat capacity

S6

• Two Electives

• Experiments and/or demonstration includes:Induction cooker

• SBA : Gas law

學生學習難處

a. 三選修科 ( 每科温習 , 預習時間較少 )b. 學生數學能力c. 物理名詞被錯誤地於日常生活中被引用而做成混淆d. 缺少生活中觀察與體驗e. 不明白課本題目之内容 ( 缺乏生活體驗 )f. 其他…… .

學校如何幫助學生以講義總結書本內容 , 並以不同之題目引導學生解題– 例 : 先畫 free-body diagram, 加上各種力

• 繼而找出不同方向之合力• 以 F=ma 或力矩原則列出方程式• 最後解方程式•提供課堂練習以示範解題步驟•提供做課本練習之時間表•提供選擇題及答案加強學生能力•以隨堂短測測試學生温習情況•短測題目以課本為主 , 測驗則以選擇題為主•每一單元均提供功課 ( 附答案 ), 並隨後附上解答

建議1. 多預習 , 多温習 .2. 完成課本所有題目 ( 近十年公開試題目 )3. 完成早十年之選擇題題目4. 親自完成所有功課5. 於課堂中 , 課堂後向老師請教6. 參加學校提供之任何形式之相關課程

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