chp31_4 - PHY2061 R. D. Field Charging a Capacitor Switch +...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
PHY2061 R. D. Field Department of Physics chp31_4.doc University of Florida Charging a Capacitor After the switch is closed the current is entering the capacitor so that I = dQ/dt , where Q is the charge on the capacitor and summing all the potential changes in going around the loop gives ε −−= IR Q C 0 , where I(t) and Q(t) are a function of time. If the switch is closed at t=0 then Q(0)=0 and −− = R dQ dt Q C 0 , which can be written in the form () QC =− 1 τ , where I have define τ =RC . Dividing by (Q- ε C) and multiplying by dt and integrating gives
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/31/2011 for the course PHY 2061 taught by Professor Fry during the Spring '08 term at University of Florida.

Ask a homework question - tutors are online