electronics: Add ind reactance

electronics/src/ind_reactance.rs

@@ -0,0 +1,50 @@
+// Copyright (c) 2023 Xu Shaohua <shaohua@biofan.org>. All rights reserved.
+// Use of this source is governed by General Public License that can be found
+// in the LICENSE file.
+
+//! [Inductive reactance](https://en.wikipedia.org/wiki/Electrical_reactance#Inductive_reactance)
+
+use std::f64::consts::PI;
+
+/// inductance with units in Henries
+/// frequency with units in Hertz
+/// reactance with units in Ohms
+#[must_use]
+pub fn get_inductance(frequency: f64, reactance: f64) -> f64 {
+    debug_assert!(frequency > 0.0);
+    debug_assert!(reactance > 0.0);
+    reactance / (2.0 * PI * frequency)
+}
+
+#[must_use]
+pub fn get_frequency(inductance: f64, reactance: f64) -> f64 {
+    debug_assert!(inductance > 0.0);
+    debug_assert!(reactance > 0.0);
+    reactance / (2.0 * PI * inductance)
+}
+
+#[must_use]
+pub fn get_reactance(inductance: f64, frequency: f64) -> f64 {
+    debug_assert!(inductance > 0.0);
+    debug_assert!(frequency > 0.0);
+    2.0 * PI * frequency * inductance
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{get_frequency, get_inductance, get_reactance};
+    #[test]
+    fn test_get_inductance() {
+        assert_eq!(get_inductance(10e3, 50.0), 0.0007957747154594767);
+    }
+
+    #[test]
+    fn test_get_frequency() {
+        assert_eq!(get_frequency(35e-3, 50.0), 227.36420441699332);
+    }
+
+    #[test]
+    fn test_get_reactance() {
+        assert_eq!(get_reactance(35e-6, 1e3), 0.2199114857512855);
+    }
+}

electronics/src/lib.rs

@@ -16,6 +16,7 @@ pub mod carrier_concentration;
 pub mod electric_conductivity;
 pub mod electric_power;
 pub mod electrical_impedance;
+pub mod ind_reactance;
 pub mod ohms_law;
 pub mod resistor_equivalence;
 pub mod resonant_frequency;