Inductive reactance calculator
An inductor opposes change in current; its impedance rises with frequency, the mirror image of a capacitor.
mH
A
Hz
ohm
Inductive reactance
3.141 59ohm
- Stored energy
- 0.02 J
- Voltage across it at that current
- 6.283 19 V
- Total impedance with the resistance
- 10.4819 ohm
- L/R time constant
- 0.001 s
Show the working
- Inductance = 10
- Current = 2
- Frequency = 50
- Series resistance = 10
- henries = 10 * 1e-3 = 0.01
- Inductive reactance = 2 * pi * 50 * 0.01 = 3.141 59
- Stored energy = 0.01 * 2^2 / 2 = 0.02
- Voltage across it at that current = 2 * 3.141 59 = 6.283 19
- L/R time constant = 0.01 / 10 = 0.001
- Total impedance with the resistance = hypot(10, 3.141 59) = 10.4819
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- XL = 2 pi f L
- E = (1/2) L I^2
- tau = L / R