Hello I understand that t=R*C as to get the time constant of how long it takes a capsitor to drain though a resistor with voltage and current lowering exponentially over that period of time but do I still use ohms law (I=V/R) to get the intial current that the capsitor is draining though the resistor where V equals the supply voltage or what the capsitor is charged to the r represents the resistance of the resistor and the I represents the amount of current I'm getting from the capsitor and resistor keeping in mind the voltage is changing on me as the capsitor discharges and the capsitance of the capsitor is the amount of charge stored up that that it is expontially discharging from. Thanks.