Alternating current, direct current & what is frequency? | Physics | Khan Academy
12:18
What is RMS value? (& why should we care?) | Alternating currents | Physics | Khan Academy
14:30
Cells, EMF, terminal voltage & internal resistance | Electric current | Physics | Khan Academy
13:29
Electric generator (A.C. & D.C.) | Magnetic effects of current | Khan Academy
18:45
Electrical Current Explained - AC DC, fuses, circuit breakers, multimeter, GFCI, ampere
23:22
What *is* a photon?
11:15
Live wire, neutral & ground (earth wire) - Domestic circuits (part 1) | Physics | Khan Academy
47:13
8.02x - Lect 1 - Electric Charges and Forces - Coulomb's Law - Polarization
8:13