Capacitor operation

Discussion in 'Homework Help' started by Steve1992, Sep 8, 2009.

  1. Steve1992

    Thread Starter Senior Member

    Apr 7, 2006
    100
    0
    When the switch is closed the transistor turns on.
    This can only happen if the diode conducts, this happens because the capacitor initially goes negative when the switch is closed?

    Am I right?
     
  2. sensor

    New Member

    Sep 8, 2009
    18
    0
    Very difficult homework for me.
    What's the purpose of this circuit?

    May be if the switch is closed the transistor turns on.
    But why is the value of capacitor is negative?
    Is it possible to have a negative value?
     
  3. Steve1992

    Thread Starter Senior Member

    Apr 7, 2006
    100
    0
    Please ignore the circuit - its wrong.

    Sorry.
     
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