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Creating potential difference

  1. Mar 26, 2009 #1
    1. The problem statement, all variables and given/known data
    The deflection plates in an oscilloscope are 10 cm by 2 cm with a gap distance of 1 mm. A 100 volt potential difference is suddenly applied to the initially uncharged plates through a 900 ohm resistor in series with the deflection plates. How long does it take for the potential difference between the deflection plates to reach 50 volts?


    2. Relevant equations
    q=c*(delta_V)


    3. The attempt at a solution
    There has to be an equation that I am missing or need
     
  2. jcsd
  3. Mar 26, 2009 #2

    rl.bhat

    User Avatar
    Homework Helper

    The whole problems converts into a RC circuit.
    Find the expression for the charging of the capacitance.
     
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