12 V Battery

Six liter-size cells in a plastic case with exposed terminals on the front.

Details

9B50 - Power Supplies

Demo use only

Instances

Instance #314
G2B20A - Demo West (Duane Physics)
Good - Normal Wear Demo use only

Used in these demonstrations

Red Optima 12V battery with knife switch on terminals, connected via alligator clips to a round halogen headlight lamp glowing brightly
Safety

Car Battery and Headlight

A basic DC circuit: closing a switch on a 12 V storage battery lights a 3 halogen lamp. Demonstrates Ohm's Law, power dissipation, and energy conversion (chemical → electrical → …
Two long black rubber-insulated wires hanging from a wooden clamp on a vertical support rod, with a white paper backdrop behind them, a red Optima 12V battery and switch on the bench below, and heavy orange leads connecting the circuit
Safety

Force on Parallel Conductors

Shows the magnetic force between parallel current-carrying wires: parallel currents attract, antiparallel currents repel. A fiber optic lamp projects wire shadows onto a white backdrop so the motion is visible …
Motor-generator board with large bronze flywheel spinning (motion blur visible), small light bulb glowing on top, switches and colored wiring on wooden base, connected to red-topped 12V battery
Safety

Motor-Generator

Students observe how a single electromagnetic machine functions as both a motor and a generator, demonstrating the reversibility of electromechanical energy conversion. The demo also illustrates electromagnetic braking via armature …
Optima car battery with red top connected by yellow cables to a wooden board holding a knife switch with thin iron wire mounted across the terminals
Safety

Resistance and Current

Shows that electrical hazard depends on current, not voltage alone. Touching a 12V car battery with your hand is safe (~1 MΩ body resistance, ~12 μA), but shorting the same …

Reserve This Equipment

Demo use only

This equipment supports lecture demonstrations and cannot be reserved directly — it is assigned automatically as part of a demonstration. To use it, request a demo that includes it.