RL Time COnstants

Discussion in 'Homework Help' started by guitar333, Nov 23, 2004.

  1. guitar333

    Thread Starter New Member

    Feb 4, 2004
    I am studying for a final but I am stuck. Please help me solve this and tell me what formulas to use so I can do the other questions similar to this one. I am stuck.....

    I made it in paint BTW.

  2. pebe

    AAC Fanatic!

    Oct 11, 2004
    You have shown a battery as your voltage source, yet you have labelled it '8.5V AC'. This is a misnomer. A battery supplies a DC voltage. If you are refering to DC then your question is valid and the current would reach 63% of its final value (where final value=8.5/1500, ie. 5.7mA), in the period of one time constant.

    You cannot apply the charging time of a time constant, to an AC waveform.