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PH 223 33:9-10/31:9

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Richard Datwyler

on 10 January 2018

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Transcript of PH 223 33:9-10/31:9

A 10 microfarad capacitor initially charge to 20 micro coulombs is discharged through a 1.0 KOhm resistor. How long does it take to reduce the capacitor's charge to 10 micro coulombs?
What value resistor will discharge a 1.0 micro farad capacitor to 10% of its initial charge in 2.0 ms?
An FM radio station broadcasts at a frequency of 100 MHz. What inductance should be pared with a 10 pF capacitor to build a receiver circuit for this station?
#25 draw on board
What value of resistor R gives the circuit here a time constant of 25 microseconds?
What is the current thought the battery after the switch has been closed for a long time?
What is the current through he battery immediately after the switch is closed?
#75 draw on board
The switch has been open for a long time. It is closed at t=0s.
Homework questions
"Could you explain what the purpose of a time constant is? Is it just a sort of converting factor for calculation purposes?"
"How do these circuits actually pick up telecommunications?"
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