A neutral line can carry both AC and DC. Just make sure that the AC or DC is unable to pass through any components connected to the neutral line.
No, you use the ohms position.
You mean ac coil, the secondary coil, of a transformer? Then for the purpose of rectification, that is , for changing ac into dc, a diode is connected in series with the secondary coil of the transformer.
It could be battery powered, AC powered, or DC powered. They usually have an AC power lead supplied.
The coil are responsible for transferring of cool air trough the unit
They can be, but most will be powered by a mains AC to DC transformer.
AC amplifiers are used to amplify AC signals and use components that handle large voltage values. DC amplifiers are used to amplify DC signals which use small powered electronic devices.
Radios use DC power supplies to operate. If a radio is powered from a mains AC supply, a power supply circuit will convert the AC supply to DC. Therefore, a radio may have both a DC and an AC power input but ultimately, the internal circuitry will always use DC.
Call an AC contractor
No, you cannot use a 50 amp automotive relay with a 12V DC coil to control 12V AC 500 watt halogen lighting. Automotive relays are designed to work with DC power, not AC power. Additionally, the amp rating of the relay refers to its capacity for DC load, not AC load. You should use a relay specifically designed for AC applications with the appropriate voltage and current ratings.
The rating is technically a minimum. You could use a larger coil and have it work. But if its a Evaporator coil it will need to be matched on the far end with a similar or larger condenser coil. If the Condenser coil is larger it will probably just take a little more refrigerant.
The distance between the two sides of an individual coil of and AC armature winding id termed the coil pitch.
It is an AC powered vehicle. It has an 88KW Magnet AC Synchronous Motor