AC Circuits Topic

RLC Circuits - AC

Concept 2 demos

Full LRC demo setup: wire spool inductor, LCR board with transparent component enclosures and light bulb on wooden base, function generator, and oscilloscope showing two sinusoidal traces

LRC Demonstrator

Demonstrate resonance in a series RLC circuit. Sweep frequency through resonance while the oscilloscope shows voltage and current becoming in-phase and current amplitude peaking when.

Sylvania Electric demonstration board with illuminated fluorescent tube at top (left half glowing blue from uncoated mercury vapor, right half white from phosphor coating). Below: white lines trace the starter circuit path through an AUTOMATIC/MANUAL toggle switch, red/orange lines trace the ballast circuit through a black ballast component. LINE connection at bottom.

Fluorescent Lamp Circuit

A Sylvania demonstration board shows a fluorescent lamp circuit with visible starter and ballast components, and circuit paths traced in white and orange. The tube is half-coated with phosphor: the …

Filters and Rectifiers

Concept 2 demos

Large vacuum tube rectifier mounted on wooden base with binding posts. Clear glass envelope reveals internal plate structure surrounding the filament. A label is visible on the base.

Simple Rectifier

A large vintage vacuum tube rectifier of the type used in battery chargers illustrates thermionic emission and one-way current flow. The clear glass envelope makes the filament (cathode) and plate …

Long-exposure photo of the word "Physics" written in the air with the revolving neon bulb, showing discrete dots from the 120 Hz flashing

Revolving Neon Bulb

A neon bulb on an extension cord appears steady when stationary, but when revolved in a circle the discrete 120 Hz flashing becomes visible. Students see directly that AC voltage …