作為一個曾經嘅 DSE 考生，小編我好明白大家喺溫習物理嘅時候會遇到啲咩困難。要考好 Physics，整理一份屬於自己嘅公式表（Formula Sheet）實在係必不可少！今次，小編就同大家整理一份 by topic 嘅《DSE 物理公式表 Formula Sheet》，而且仲有齊中文版同英文版 English Version！(唔使多謝小編🤣) 再分享下點解呢份公式表咁重要，仲有啲溫習嘅小貼士，希望可以幫到你哋！
為什麼要整 Formula Sheet？
其實，Formula Sheet 唔單止係一張紙咁簡單，佢可以幫你：
- 清晰概念：喺溫書嘅時候，可以幫你整理思緒，記住每一條公式背後嘅意思。
- 快速回顧：臨考之前，輕鬆睇一睇重點，快速 refresh 記憶，幫你減少考試焦慮！
我知道有啲同學可能以為 DSE 會提供公式表就可以「hea hea」咁溫習，但其實考評局提供嘅公式表係冇單位、更冇解釋，真係唔夠用！如果唔認真溫書，考試時就會對住一堆 symbols 唔知點用，白白浪費分數。
DSE 物理公式表中文版 (by topic 整理)
直線運動
where s = 位移 (+/—ive) (單位: m)
where u, v = 速度 (+/—ive) (單位: m s—1)
where a = 加速度 (+/—ive) (單位: m s—1)
Formulas A1-A5
溫度 & 物態
where E = 能量 (單位: J)
where m = 質量 (單位: kg)
where c = 比熱容量 (單位: J kg—1 K—1)
where l = 潛熱 (單位: J kg—1)
理想氣體
where p = 壓強 (單位: Pa)
where V = 體積 (單位: m3)
where R = 8.31 (單位: J mol—1 K—1)
where T = 溫度 (單位: K)
where kB = 1.38 × 10-23 (單位: J K—1)
where EK = 動能 (單位: J)
where NA = 6.02 x 1023 (單位: mol—1)
Formulas B1-B7
動量
where F = 力 (單位: N)
where m = 質量 (單位: kg)
轉矩
where F = 力 (單位: N)
能量 & 功率
where Ep = 重力勢能 (單位: J)
where m = 質量 (單位: kg)
where g = 9.81 (單位: m s—2)
where Ek = 動能 (單位: J)
where P = 機械功率 (單位: W)
where F = 施加力 (單位: N)
圓週運動
where a = 向心加速度 (單位: m s—2)
where ω = 角速度 (單位: rad s—1)
where f = 頻率 (單位: Hz)
where F = 向心力 (單位: N)
引力
where F = 量值引力 (單位: N)
where G = 6.67 × 10-11 (單位: N m2 kg—2)
where m1, m2 = 質量 (單位: kg)
where r = 距離 (單位: m)
Formulas C1-C3
雙狹縫 & 衍射光柵
where Δy = 條紋之間的距離 (單位: m)
where λ = 波長 (單位: m)
where D = 雙狹縫與條紋之間的距離 (單位: m)
where a = 雙狹縫之間的距離 (單位: m)
where d = 衍射光柵之間的距離 (單位: m)
where n = 0, 1, 2, 3
透鏡
where u = 物距 (單位: m)
where v = 像距 (單位: m)
where f = 焦距 (單位: m)
Formulas D1-D13
電場
where F = 靜電力 (單位: N)
where Ɛ0 = 8.85 × 10-12 (單位: C2 N—1 m—2)
where Q1, Q2 = 電荷 (單位: C)
where r = 距離 (單位: m)
where E = 電場強度 (單位: N C—1 or V m—1 )
where Q = 電荷 (單位: C)
where V = 電勢差 (單位: V)
where d = 平行板間的距離 (單位: m)
電阻率
where R = 電阻 (單位: Ω)
where ρ = 電阻率 (單位: Ωm)
where l = 長度 (單位: m)
where A = 橫截面面積 (單位: m2)
電阻器
where R = 等效電阻 (單位: Ω)
電路
where P = 功率 (單位: W)
where I = 電流 (單位: A)
where V = 電勢差 (單位: V)
where R = 電阻 (單位: Ω)
磁場對運動電荷的作用力
where F = 力 (單位: N)
where B = 磁場強度 (單位: T)
where Q = 電荷 (單位: C)
磁場對載流導體的作用力
where F = 力 (單位: N)
where B = 磁場強度 (單位: T)
where I = 電流 (單位: A)
where L = 長度 (單位: m)
長直導線所產生的磁場
where B = 磁場強度 (單位: T)
where μ0 = 4π × 10-7 (單位: H m—1)
where I = 電流 (單位: A)
where r = 距離 (單位: m)
螺線管中的磁場
where B = 磁場強度 (單位: T)
where μ0 = 4π × 10-7 (單位: H m—1)
where I = 電流 (單位: A)
where l = 螺線管長度 (單位: m)
感生電動勢
where ε = 感應電動勢
where Δφ = 磁通量的改變 (單位: Wb)
where Δt = 時間間隔 (單位: s)
where φ = 磁通量 (單位: Wb)
變壓器
where VS = 副線圈電勢差 (單位: V)
where VP = 原線圈電勢差 (單位: V)
where NS = 副線圈線圈數量
where NP = 原線圈線圈數量
Formulas E1-E4
放射性
where N = 剩餘的不衰變放射性核
where k = 衰變/放射常數 (單位: s—1)
where t = 時間間隔 (單位: s)
where t1/2 = 半衰期 (單位: s)
質能等價性
where E = 能量 (單位: J or eV)
where m = 質量 (單位: kg or eV/c2 )
where c = 3 × 108 (單位: m s—1)
DSE Physics Formula Sheet English Version (by topic)
Equations of Motion
where s = displacement (+/—ive) (units: m)
where u, v = initial, final velocity (+/—ive) (units: m s—1)
where a = acceleration (+/—ive) (units: m s—1)
where t = time (≥ 0) (units: s)
Formulas A1-A5
Temperature & State
where E = energy (units: J)
where m = mass (units: kg)
where c = specific heat capacity (units: J kg—1 K—1)
where ΔT = change in temperature (units: K)
where l = latent heat (units: J kg—1)
Ideal Gas
where p = pressure (units: Pa)
where V = volume (units: m3)
where n = number of moles of gas
where R = 8.31 (units: J mol—1 K—1)
where T = temperature (units: K)
where N = number of gas molecules
where kB = 1.38 × 10-23 (units: J K—1)
where EK = KE (units: J)
where NA = 6.02 x 1023 (units: mol—1)
Formulas B1-B7
Force & Momentum
where F = force (units: N)
where m = mass (units: kg)
Moments
where F = force (units: N)
Energy & Power
where EP = gravitational PE (units: J)
where m = mass (units: kg)
where g = 9.81 (units: m s—2)
where EK = KE (units: J)
where P = mechanical power (units: W)
where F = applied force (units: N)
Circular Motion
where a = centripetal acceleration (units: m s—2)
where v = speed (units: m s—1)
Where r = radius (units: m)
Where ω = angular velocity (units: rad s—1)
where f = frequency (units: Hz)
where F = centripetal force (units: N)
Gravitational Force
where F = gravitational force (units: N)
where G = 6.67 × 10-11 (units: N m2 kg—2)
where m1, m2 = mass (units: kg)
where r = separation (units: m)
Formulas C1-C3
Double Slit & Diffraction Grating
where Δy = separation between fringes (units: m)
where λ = wavelength (units: m)
where D = separation between the double-slit & the screen (units: m)
where a = separation between the slits (units: m)
where d = separation between each grating (units: m)
where n = order = 0, 1, 2, 3
Lenses
where u = object distance (units: m)
where v = image distance (units: m)
where f = focal length (units: m)
Formulas D1-D13
Electric Fields
where F = electrostatic force (units: N)
where Ɛ0 = 8.85 × 10-12 (units: C2 N—1 m—2)
where Q1, Q2 = electric charge (units: C)
where r = separation (units: m)
where E = electric field strength (units: N C—1 or V m—1)
where Q = charge (units: C)
where V = potential difference (units: V)
where d = separation (units: m)
Resistivity
where R = resistance (units: Ω)
where ρ = resistivity (units: Ωm)
where l = length (units: m)
where A = cross sectional area (units: m2)
Resistors
where R = equivalent resistance (units: Ω)
Electric Circuits
where P = power (units: W)
where I = current (units: A)
where V = potential difference (units: V)
where R = resistance (units: Ω)
Force on a Moving Charge in a Magnetic Field / B-field
where F = magnetic force (units: N)
where B = magnetic field strength (units: T)
where Q = charge (units: C)
Force on a Current-carrying Conductor in a Magnetic Field/ B-field
where F = magnetic force (units: N)
where B = magnetic field strength (units: T)
where I = current (units: A)
where L = length (units: m)
Magnetic Field/ B-field due to a Long Straight Wire
where B = magnetic field strength (units: T)
where μ0 = 4π × 10-7 (units: H m—1)
where I = current (units: A)
where r = distance (units: m)
Magnetic Field/ B-field due to a Long Solenoid
where B = magnetic field strength (units: T)
where μ0 = 4π × 10-7 (units: H m—1)
where I = current (units: A)
where l = total length of the solenoid (units: m)
Induced e.m.f.
where ε = induced e.m.f
where Δφ = change in magnetic flux (units: Wb)
where Δt = time interval (units: s)
where φ = magnetic flux (units: Wb)
Transformers
where VS = potential difference across the Secondary coil (units: V)
where VP = potential difference across the Primary coil (units: V)
where NS = number of turns in the Secondary coil
where NP = number of turns/ windings in the Primary coil
Formulas E1-E4
Radioactivity
where N = number of undecayed radioactive nuclei
where k = decay constant (units: s—1)
where t = time (units: s)
where t1/2 = half-life (units: s)
where A = activity (units: Bq)
Energy-mass Equivalence
where E = energy (units: J or eV)
where m = mass (units: kg or eV/c2 )
where c = 3 × 108 (units: m s—1)
DSE Physcis 公式表應用建議
「點解要溫呢張 Formula Sheet ？」
有好多同學都恃住 DSE 會提供 Formula Sheet 俾考生，就 hea住咁溫公式。但其實個張咁嘅嘢真係好空泛！考評局張嘢唔單止冇 units，仲要冇解釋。因為冇認真溫書，所以好多同學 DSE 嘅時候唔識得點樣運用，淨係可以望住堆 symbols，白白送分比考評局。
Physics 嘅 formula 最麻煩嘅係就算你用啱條公式，但擺錯 value 嘅話都係「係咁先」！
應該點樣溫 Formula Sheet？
- 初步階段：喺你開始溫書嘅時候，不妨手上攞住 Formula Sheet，邊睇邊做題目。可以用學校嘅工作紙或者課本嘅練習題，幫助你實際應用公式。
- 即時記錄：每次上完堂後，記得即刻做題，當你遇到啲特別嘅情況時，可以喺公式旁邊寫低啲備註，咁將來再睇就會更容易理解。
- 重複練習：見得多、用得多，當你做 Past Paper 或者考試時，遇到啲難題都唔使驚，因為你已經練習過！
溫習小貼士
- 理解原理：記住，每一條公式背後都有佢嘅 key concept，了解咗呢啲原理，你就可以更加靈活應用，避免掉入陷阱。
- 勤力又有技巧：想喺 DSE 拿高分，除咗要肯下工夫，仲要懂得用技巧，咁先可以輕鬆應對各種考題。
總結
記住！想喺 DSE 奪星， 除咗要 work hard (勤力) 之外，仲要 work smart (有技巧)。大家需要明白每一條公式背後嘅key concept， 先可以睇得出前路有咩陷阱等緊你。所以快啲整理好你嘅 Formula Sheet，並理解每條公式嘅背後意思，唔好再用錯 formula 或者擺錯 value 啦！