dc power supply
A laptop runs on DC. Either from the battery, or the external power supply, which converts AC power to DC.
the universel motor can runs at both ac and dc supply.
ac transmits the voltage over long distances. so v use ac in trains
Trains use DC currents! It's predominantly AC now but more dc in the early days. Both still in use. See DC and AC section below article-
No, the pump runs on AC current the battery supplies DC current. Yes, but you will need an inverter to turn the DC current into AC current
It's runaway train It's by AC/DC
formula for ac to dc
A typical AC waveform is symmetrical about a zero crossing point. You can bias the AC with DC such that the AC waveform is symmetrical about the DC voltage.
The difference AC and DC grounding is that AC is alternate current and DC is direct current. Grounding for both AC and DC is the same.
AC/DC are from Sydney, Australia.
Ac/dc