Added Coulomb_Law

physics/coulombs_law.py

@@ -0,0 +1,42 @@
+"""
+Coulomb's law states that the magnitude of the electrostatic force of attraction
+or repulsion between two point charges is directly proportional to the product
+of the magnitudes of charges and inversely proportional to the square of the
+distance between them.
+
+F = k * q1 * q2 / r^2
+
+k is Coulomb's constant and equals 1/(4π*ε0)
+q1 is charge of first body (C)
+q2 is charge of second body (C)
+r is distance between two charged bodies (m)
+
+Reference: https://en.wikipedia.org/wiki/Coulomb%27s_law
+"""
+
+
+def coulombs_law(q1: float, q2: float, radius: float) -> float:
+    """
+    Calculate the electrostatic force of attraction or repulsion
+    between two point charges
+
+    >>> coulombs_law(15.5, 20, 15)
+    12382849136.06
+    >>> coulombs_law(1, 15, 5)
+    5392531075.38
+    >>> coulombs_law(20, -50, 15)
+    -39944674632.44
+    >>> coulombs_law(-5, -8, 10)
+    3595020716.92
+    >>> coulombs_law(50, 100, 50)
+    17975103584.6
+    """
+    if radius <= 0:
+        raise ValueError("The radius is always a positive non zero integer")
+    return round(((8.9875517923 * 10**9) * q1 * q2) / (radius**2), 2)
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()