⚡ 電磁學工具

⚡ 串聯等效（1/C = 1/C₁ + 1/C₂）Capacitors Series 電容串聯計算器。輸入多個電容值，按 1/C_eq = 1/C₁+1/C₂+… 求串聯等效電容，串聯後總電容減小、耐壓升高，常用於高壓分壓與單隻耐壓不足時的組合配容。Capacitors Series - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 串聯等效（L = L₁ + L₂）Inductors Series 電感串聯計算器，忽略互感時串聯等效電感 L=L₁+L₂，用於電感組合設計。Inductors Series - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 串聯等效（R = R₁ + R₂ + R₃）Resistors Series 電阻串聯計算器。輸入多個電阻值，按 R_eq = R₁+R₂+… 求串聯等效電阻，總電阻為各值之和、耐壓相加，常用於分壓電路與需要提高阻值的組合配阻。Resistors Series - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 安培定律（B = μ₀·I / (2π·r)）B Field Wire 輸入電流與距長直導線的距離，按安培定律 B=μ₀·I/(2πr) 計算周圍環向磁感應強度，用於電磁學教學與磁場分析。B Field Wire - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 容抗（X_C = 1 / (2π·f·C)）Capacitive Reactance 容抗計算器，由電容與頻率按 X_C=1/(2π·f·C) 求容抗，用於交流電路分析。Capacitive Reactance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 並聯等效（1/L = 1/L₁ + 1/L₂）Inductors Parallel 電感並聯計算器。輸入多個電感值，按 1/L_eq = 1/L₁+1/L₂+… 求並聯等效電感，並聯後總電感減小，常用於需要小電感或均流的多繞組組合設計。Inductors Parallel - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 並聯等效（1/R = 1/R₁ + 1/R₂）Resistors Parallel 電阻並聯計算器。輸入多個電阻值，按 1/R_eq = 1/R₁+1/R₂+… 求並聯等效電阻，總電阻小於最小支路，適用於分流設計與降低阻值的多電阻組合。Resistors Parallel - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 並聯等效（C = C₁ + C₂）Capacitors Parallel 電容並聯計算器。輸入多個電容值（單位 μF/pF），按 C_eq = C₁+C₂+… 求和得到並聯等效電容，並説明並聯後耐壓取最小值、總電容增大，適合電源退耦與濾波電路設計。Capacitors Parallel - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 感應電動勢（ε = N·|ΔΦ| / Δt）Faraday Induction 法拉第電磁感應計算器。輸入線圈匝數 N、磁通變化量 ΔΦ 與時間間隔 Δt，按 ε = N·|ΔΦ|/Δt 求感應電動勢，適用於發電機、變壓器原理演示與感應電壓估算。Faraday Induction - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 歐姆定律（V = I·R）Ohms Law 歐姆定律計算器。輸入電壓、電流、電阻中任意兩個量，按 V = I·R 互求第三量，是電路分析與電子入門最基礎的電壓、電流、電阻關係計算工具。Ohms Law - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 〰️ 求真空電磁波波阻抗Free Space Impedance 真空波阻抗計算器。按 Z₀ = √(μ₀/ε₀) ≈ 376.73 Ω 計算自由空間中平面電磁波的本徵阻抗，結果可用於天線匹配、電磁波傳播與傳輸線特性阻抗參考。Free Space Impedance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 由兩點電荷與距離求靜電力Coulomb Force Calculator - : Input q1 , q2 , r , Output F ( N ) 輸入兩點電荷 q1、q2（庫侖）與它們之間的距離 r（米），按庫侖定律 F=k·q₁q₂/r² 計算兩電荷間的靜電力大小。Coulomb Force Calculator - : Input q1 , q2 , r , Output F ( N ) - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no in... 💨 由匝數、截面積與長度求電感Inductance Solenoid 螺線管電感計算器，輸入匝數、截面積與長度按 L=μ₀N²A/l 求電感，用於線圈設計。Inductance Solenoid - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 🔄 由匝數、電流、面積與磁場求磁力矩Coil Torque 輸入匝數 N、電流 I、線圈面積 A、磁感應強度 B 與夾角 θ，按 τ=NIA B·sinθ 計算通電線圈在磁場中受到的磁力矩。Coil Torque - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 🥞 由極板面積與間距求電容Capacitance Parallel Plate 平行板電容計算器，輸入相對介電常數、極板面積與間距按 C=ε₀εr·A/d 求電容，用於電容設計。Capacitance Parallel Plate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism t... ⚡ 由點電荷與距離求電勢Electric Potential Point 點電荷電勢計算器。輸入點電荷電量 q 與到觀測點的距離 r，按 V = k·q/r（k 為庫侖常數）求空間中某點的電勢，適用於靜電場分佈分析與教學演示。Electric Potential Point - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 由點電荷與距離求電場強度Electric Field Point 點電荷電場計算器，輸入點電荷 q 與距離 r 按 E=k·q/r² 求電場強度，用於靜電場分析。Electric Field Point - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 🔌 由電容與電壓求儲能Energy Capacitor 電容儲能計算器，輸入電容 C 與電壓 V 按 E=½CV² 求電場儲能，用於電容能量評估。Energy Capacitor - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 🔌 由電感與電流求儲能Energy Inductor 電感儲能計算器，輸入電感 L 與電流 I 按 E=½LI² 求磁場儲能，用於電感能量評估。Energy Inductor - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 🕐 由電感與電阻求時間常數RL Time Constant Calculator - : Input L , R , Output τ( s ) RL 時間常數計算器，輸入電感 L 與電阻 R 按 τ=L/R 求時間常數，用於暫態電路分析。RL Time Constant Calculator - : Input L , R , Output τ( s ) - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no instal... 📈 由電流與截面積求電流密度Current Density Calculator - : Input I , A , Output J ( A / m ²) 電流密度計算器，輸入電流 I 與導體截面積 A 按 J=I/A 求電流密度，用於導體載流評估。Current Density Calculator - : Input I , A , Output J ( A / m ²) - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no i... ➡️ 由電流與材料參數求漂移速度Drift Velocity 漂移速度計算器，輸入電流、載流子密度、截面積按 v_d=I/(n·A·e) 求漂移速度，用於導體物理。Drift Velocity - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 📏 由電阻率、長度與截面積求電阻Resistivity Law 電阻定律計算器，輸入電阻率、長度與截面積按 R=ρL/A 求導體電阻，用於材料與導線選型。Resistivity Law - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ➡️ 由磁場、電流與長度求安培力Force Wire Field 輸入磁感應強度 B、電流 I、導線長度 L 與夾角 θ，按安培力公式 F=BIL·sinθ 計算載流導線在磁場中受到的力。Force Wire Field - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 電功率（P = V·I = V²/R = I²R）Electric Power 電功率計算器。輸入電壓與電流（或電阻），按 P = V·I = V²/R = I²·R 計算直流電路消耗功率，支持多變形互求，方便電路功耗估算與元器件選型。Electric Power - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 磁通（Φ = B·A）Magnetic Flux 磁通量計算器。輸入磁感應強度 B 與垂直穿過的面積 A（及夾角），按 Φ = B·A·cosθ 求穿過迴路的磁通量，適用於電機、變壓器磁通估算與法拉第定律教學。Magnetic Flux - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 螺線管內部（B = μ₀·n·I）Solenoid Field 螺線管磁場計算器，求長螺線管內部磁場 B=μ₀·n·I，用於電磁鐵與線圈設計。Solenoid Field - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 諧振頻率（f = 1 / (2π·√(L·C))）Lc Resonance LC 諧振頻率計算器。輸入電感 L 與電容 C，按 f = 1/(2π√(LC)) 求無阻尼 LC 迴路的固有諧振頻率，廣泛用於射頻振盪器、濾波器與選頻電路設計。Lc Resonance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools.