⚡ 电磁学工具

⚡ 串联等效（1/C = 1/C₁ + 1/C₂）Capacitors Series 电容串联计算器。输入多个电容值，按 1/C_eq = 1/C₁+1/C₂+… 求串联等效电容，串联后总电容减小、耐压升高，常用于高压分压与单只耐压不足时的组合配容。Capacitors Series - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 串联等效（L = L₁ + L₂）Inductors Series 电感串联计算器，忽略互感时串联等效电感 L=L₁+L₂，用于电感组合设计。Inductors Series - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 串联等效（R = R₁ + R₂ + R₃）Resistors Series 电阻串联计算器。输入多个电阻值，按 R_eq = R₁+R₂+… 求串联等效电阻，总电阻为各值之和、耐压相加，常用于分压电路与需要提高阻值的组合配阻。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 输入电流与距长直导线的距离，按安培定律 B=μ₀·I/(2πr) 计算周围环向磁感应强度，用于电磁学教学与磁场分析。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 容抗计算器，由电容与频率按 X_C=1/(2π·f·C) 求容抗，用于交流电路分析。Capacitive Reactance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 并联等效（1/L = 1/L₁ + 1/L₂）Inductors Parallel 电感并联计算器。输入多个电感值，按 1/L_eq = 1/L₁+1/L₂+… 求并联等效电感，并联后总电感减小，常用于需要小电感或均流的多绕组组合设计。Inductors Parallel - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 并联等效（1/R = 1/R₁ + 1/R₂）Resistors Parallel 电阻并联计算器。输入多个电阻值，按 1/R_eq = 1/R₁+1/R₂+… 求并联等效电阻，总电阻小于最小支路，适用于分流设计与降低阻值的多电阻组合。Resistors Parallel - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 并联等效（C = C₁ + C₂）Capacitors Parallel 电容并联计算器。输入多个电容值（单位 μF/pF），按 C_eq = C₁+C₂+… 求和得到并联等效电容，并说明并联后耐压取最小值、总电容增大，适合电源退耦与滤波电路设计。Capacitors Parallel - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 感应电动势（ε = N·|ΔΦ| / Δt）Faraday Induction 法拉第电磁感应计算器。输入线圈匝数 N、磁通变化量 ΔΦ 与时间间隔 Δt，按 ε = N·|ΔΦ|/Δt 求感应电动势，适用于发电机、变压器原理演示与感应电压估算。Faraday Induction - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 欧姆定律（V = I·R）Ohms Law 欧姆定律计算器。输入电压、电流、电阻中任意两个量，按 V = I·R 互求第三量，是电路分析与电子入门最基础的电压、电流、电阻关系计算工具。Ohms Law - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 〰️ 求真空电磁波波阻抗Free Space Impedance 真空波阻抗计算器。按 Z₀ = √(μ₀/ε₀) ≈ 376.73 Ω 计算自由空间中平面电磁波的本征阻抗，结果可用于天线匹配、电磁波传播与传输线特性阻抗参考。Free Space Impedance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 由两点电荷与距离求静电力Coulomb Force Calculator - : Input q1 , q2 , r , Output F ( N ) 输入两点电荷 q1、q2（库仑）与它们之间的距离 r（米），按库仑定律 F=k·q₁q₂/r² 计算两电荷间的静电力大小。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... 💨 由匝数、截面积与长度求电感Inductance Solenoid 螺线管电感计算器，输入匝数、截面积与长度按 L=μ₀N²A/l 求电感，用于线圈设计。Inductance Solenoid - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 🔄 由匝数、电流、面积与磁场求磁力矩Coil Torque 输入匝数 N、电流 I、线圈面积 A、磁感应强度 B 与夹角 θ，按 τ=NIA B·sinθ 计算通电线圈在磁场中受到的磁力矩。Coil Torque - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 🥞 由极板面积与间距求电容Capacitance Parallel Plate 平行板电容计算器，输入相对介电常数、极板面积与间距按 C=ε₀εr·A/d 求电容，用于电容设计。Capacitance Parallel Plate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism t... ⚡ 由点电荷与距离求电势Electric Potential Point 点电荷电势计算器。输入点电荷电量 q 与到观测点的距离 r，按 V = k·q/r（k 为库仑常数）求空间中某点的电势，适用于静电场分布分析与教学演示。Electric Potential Point - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 由点电荷与距离求电场强度Electric Field Point 点电荷电场计算器，输入点电荷 q 与距离 r 按 E=k·q/r² 求电场强度，用于静电场分析。Electric Field Point - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 🔌 由电容与电压求储能Energy Capacitor 电容储能计算器，输入电容 C 与电压 V 按 E=½CV² 求电场储能，用于电容能量评估。Energy Capacitor - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 🔌 由电感与电流求储能Energy Inductor 电感储能计算器，输入电感 L 与电流 I 按 E=½LI² 求磁场储能，用于电感能量评估。Energy Inductor - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 🕐 由电感与电阻求时间常数RL Time Constant Calculator - : Input L , R , Output τ( s ) RL 时间常数计算器，输入电感 L 与电阻 R 按 τ=L/R 求时间常数，用于暂态电路分析。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... 📈 由电流与截面积求电流密度Current Density Calculator - : Input I , A , Output J ( A / m ²) 电流密度计算器，输入电流 I 与导体截面积 A 按 J=I/A 求电流密度，用于导体载流评估。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... ➡️ 由电流与材料参数求漂移速度Drift Velocity 漂移速度计算器，输入电流、载流子密度、截面积按 v_d=I/(n·A·e) 求漂移速度，用于导体物理。Drift Velocity - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. 📏 由电阻率、长度与截面积求电阻Resistivity Law 电阻定律计算器，输入电阻率、长度与截面积按 R=ρL/A 求导体电阻，用于材料与导线选型。Resistivity Law - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ➡️ 由磁场、电流与长度求安培力Force Wire Field 输入磁感应强度 B、电流 I、导线长度 L 与夹角 θ，按安培力公式 F=BIL·sinθ 计算载流导线在磁场中受到的力。Force Wire Field - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 电功率（P = V·I = V²/R = I²R）Electric Power 电功率计算器。输入电压与电流（或电阻），按 P = V·I = V²/R = I²·R 计算直流电路消耗功率，支持多变形互求，方便电路功耗估算与元器件选型。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 磁通量计算器。输入磁感应强度 B 与垂直穿过的面积 A（及夹角），按 Φ = B·A·cosθ 求穿过回路的磁通量，适用于电机、变压器磁通估算与法拉第定律教学。Magnetic Flux - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 螺线管内部（B = μ₀·n·I）Solenoid Field 螺线管磁场计算器，求长螺线管内部磁场 B=μ₀·n·I，用于电磁铁与线圈设计。Solenoid Field - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools. ⚡ 谐振频率（f = 1 / (2π·√(L·C))）Lc Resonance LC 谐振频率计算器。输入电感 L 与电容 C，按 f = 1/(2π√(LC)) 求无阻尼 LC 回路的固有谐振频率，广泛用于射频振荡器、滤波器与选频电路设计。Lc Resonance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Electromagnetism tools.