Think of AC as a wave that undulates between a peak positive and negative value. Now if you flip the negative half of the wave above zero line you have all the peaks positive. This is done with what is called a full wave rectifier. Now you need to smooth out the humps into a steady single voltage which is DC. This is done by a circuit with a capacitor as a key component. The capacitor and some other components smooth out the "ripples" to produce the desired DC voltage.
ams to voltage
A bridge rectifier is usually used in this application. Most portable electronic devices utilize d.c. power. Yet, in order to recharge depleted batteries, they are plugged into an a.c. outlet. In many cases, the cord connector housing that plugs into the outlet has a bridge rectifier built into it that converts a.c. to d.c. voltage.
The generated voltage in a power station is AC voltage, not DC. So, it is never converted to AC, because it is already AC.
rectifyer
ac supply converted with dc supply
ac supply converted with dc supply
An alternator produces AC current but it is converted to DC by the rectifier inside the alternator.
In a chopper type amplifier the dc i/p voltage is converted into an ac voltage, amplified by an ac amplifier and then converted back into a dc voltage proportional to the original i/p signal
A grid DC tie is where AC is converted into DC, which is then converted to AC again on the other side. If you have a DC to AC transformer setup, you'd need to add a second one going the "other" way for a full DC tie station.
Converter
No. Batteries can only produce dc current which can further be converted to AC using inverters.
The engine itself emits nothing. The alternator does. The alternator emits AC, but it is converted to DC.
An AC water heater can be converted to operate on DC current but the cost will be large. In the electrical trade anything can be done if enough money is spent to get the results that are requested.
we can convert a dc supply to an ac supply using inverters. Its a common operation which we observe in our daily lives dc can be converted to Ac using an undulator.