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Purpose:To demonstrate the time constant of the circuit and its dependence on L and R.
Procedure:Connect R and L in series and use the PASCO generator's square waves as a signal source. Start with 100Ohm resistor and 4.25mH air core coil and display the voltage across the inductor (see 2nd picture). Vary the values of L by sliding the iron rod through the inductor. Note that the brass/copper rod does not affect L. Show the voltage across the resistor to demonstrate the current dependence in the circuit (see 3rd picture). A schematic of the set up is shown below (4th picture).
Hints:Use differential input oscilloscope to display both the charge and the current dependence.
A camera pointing at the scope's screen is available for the use in room 203.
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