public void PointChargeTest([RandomDouble(5)] double charge)
{
var pointCharge = new PointCharge(charge);
Assert.That(pointCharge.ElectricDipoleMoment, Is.EqualTo(Vector3.Zero));
Assert.That(pointCharge.MagneticDipoleMoment, Is.EqualTo(Vector3.Zero));
Assert.That(pointCharge.Charge, Is.EqualTo(charge));
}
public void TestElectricField()
{
PointCharge p = new PointCharge(-8.0E-9);
Vector result = p.ElectricFieldAtPoint(new Vector(1.2, -1.6)).DecimalPoints(0);
//University Physics page 702
Vector expected = new Vector(-11, 14);
Assert.AreEqual(expected, result);
}
public void TestElectricForce()
{
//NOTE: Correct order of magnitude but failing due to floating point precision
PointCharge p = new PointCharge(-8.0E-9);
PointCharge q = new PointCharge(-6.0E-9, new Vector(1.2, -1.6));
Vector result = p.ElectricForceOn(q);
//Based on TestElectricField() above.
Vector expected = new Vector(-11, 14) * (-6.0E-9) * Math.Sign(q.Charge);
Assert.IsTrue(Helpers.WithinTolerance(expected, result));
}
