PURPOSE: To show L/R time constant for a slow circuit.
DESCRIPTION: A nine-volt battery is used to energize the LR circuit while the current through the LR system is observed on an oscilloscope. The system is then shorted and allowed to de-energize. This setup uses an approximately 6 kilohenry coil and about 12 kilohms series resistance to produce a time constant of about 1/2 second. See circuit below.
REFERENCES: (PIRA 5J20.10)
EQUIPMENT: Mounted circuit, oscilloscope on scope/TV cart.
SETUP TIME: 5 min.
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