AC current is known as alternating current and DC current is known as direct current in both of these currents AC current will be alternating so many times in positive and negative per second so it is called alternating current and in DC current it doesn't alternates.
in AC currents we have more chances that if we get shock then we can become free from the current because it alternate so many times per second and in DC current the chances are less because if the current is low or voltage is low then only we can become free from current otherwise we want it be able to free ourselves from the current.
we need about 10 to 20 mm thick wires for transfer in DC High Voltage power and very thin wires about 2 to 3 millimetres can carry e High Voltage AC current so due to this AC current we are able to power the the houses and the size of wire is still very small

Differences between AC and DC Generator

1. Output Type
- AC Generator: AC generators produce alternating current, where the direction of current flow changes periodically. This type of current is commonly used in household electricity and industrial applications.
- DC Generator: DC generators produce direct current, where the current flows in one direction only. DC current is commonly used in batteries, electronic devices, and certain industrial applications.

2. Commutation
- AC Generator: AC generators do not require commutation as they already produce alternating current. The changing magnetic field in the generator induces an alternating current in the coils.
- DC Generator: DC generators require commutation to convert the alternating current produced in the generator coils into direct current. Commutation involves the use of a commutator and brushes to ensure that the current flows in one direction only.

3. Applications
- AC Generator: AC generators are commonly used in power plants and electrical grids to generate electricity for residential, commercial, and industrial use. They are also used in appliances, motors, and other devices that require AC power.
- DC Generator: DC generators are used in applications where a steady and constant current is required, such as in battery charging, electroplating, and certain types of industrial machinery. They are also used in portable generators and backup power systems.