K7-12. RC Circuit - RC Time Constant - Projection Meters

Purpose

To measure an RC time constant and to observe the shape of the charging and discharging drives.

Equipment

RC circuit with meters on plastic sheet for overhead projector use, 30 and 100 microfarad capacitors, 5 and 10 kilohm resistors, with overhead projector.

Images

Description

An RC circuit with meters is mounted on an overhead projector projectual. The voltage across the capacitor and the charging current are displayed. Various combinations of resistance and capacitance can be plugged into the circuit . See circuit ddiagram below.