Current time:0:00Total duration:9:02
0 energy points
Electrostatic telegraphs (case study)
Long before the internet people thought about sending information along wires using static electricity. Created by Brit Cruise.
If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.