CHEM 152 Study Guide - Final Guide: Operational Amplifier, Output Impedance, Dielectric
Document Summary
Dc (cid:373)ea(cid:374)s direct curre(cid:374)t (curre(cid:374)t does(cid:374)"t (cid:448)ary (cid:449)ith ti(cid:373)e. Two conducting plates separated by small distance with dielectric between them. Capacitance (c) is the relation between the charge (q) acquired by each plate at given voltage (v) Capacitance is constant for given capacitor; depends only on structure and dimensions of the capacitor. For ac: capacitors do(cid:374)"t stop curre(cid:374)t fro(cid:373) flo(cid:449)i(cid:374)g. Capacitor between ac and dc will allow ac current to flow but will filter out dc current. Current flows direction positive charge would flow, which is the opposite of electron flow (+ to -) Kirchoff"s current law: sum of currents around any point in a circuit is zero. Currents flowing into a point are positive and currents flowing out are negative. V = v1 + v2 + v3 + etc. R = r1 + r2 + r3 + etc. Kirchoff"s voltage law: sum of voltages around a closed electrical loop is zero.
