Variable Capacitor

Demo

Variable capacitor, LCR meter, dielectric sheets

Concept Overview: 

1. Capacitance increases as the distance between plates decreases.

2. Capacitance increases when a dielectric material is involved.

3. Potential increases as distance between capacitor plates is increased. (see optional equipment and tasks)

Lecturer Procedure
Step(s) to Follow Expected Result

1. Adjust movable plate by turning knob.

2. Note changes on the LCR meter

Capacitance increases as the plates get closer together

1. Insert dielectric materials, one at a time into the capacitor.

2. Note changes on the LCR meter

Capacitance will increase as the materials are added.  Different materials will create a different capacitance.

 

Identifier: 
E&M: ES - 011