using System;

namespace Science.Physics.GeneralPhysics
{
	/// <summary>
	/// CircuitRL
	/// </summary>
	public class CircuitRL
	{
		private Resistance r;
		private Inductance l;
		private ElectricPotentialDifference e;
		private ElectricCurrent i;
		private bool charging = true;
		public CircuitRL()
		{
		}
		public CircuitRL(Resistance R, Inductance L, ElectricPotentialDifference E)
		{
			r = R;
			l = L;
			e = E;
		}
		public CircuitRL(Resistance R, Inductance L, ElectricCurrent I)
		{
			r = R;
			l = L;
			i = I;
			charging = false;
		}
		public double Current(Time t)
		{
			if(charging)
				return e.V/r.Ohm*(1.0-Math.Exp(-t.s/TimeConstant));
			else
				return i.A*Math.Exp(-t.s/TimeConstant);
		}
		public double TimeConstant
		{
			get{return l.H/r.Ohm;}
		}
	}
}