Technically speaking current actually flows from negative to positive, but before that was figured out everyone thought it was positive to negative. But it did really matter as long as the convention was the same everywhere.
Direct current (DC) is the name of the electric current that always flows in the same direction. It is commonly used in electronics and power transmission systems.
No. Motors can be run in either direction, clockwise or counter clockwise. However, mechanically spinning an electric motor will generate electric power.
Direction of the electric field vector is the direction of the force experienced by a charged particle in an external electric field.
The electric force acts in the opposite direction of the electric field on electrons.
It has plenty of direction. The direction of the electric field at any point in it is the direction of the force that would be felt by an infinitesimally small positive charge placed at that point.
To determine the direction of the electric field, you can use a positive test charge. The direction of the electric field is the direction in which a positive test charge would move if placed in that field.
AC stands for alternating current in physics. It is an electric current that reverses direction at regular intervals, typically used in power distribution and for electric motors.
A vector quantity can be described in many different units, because there are many different vector quantities. For example, a distance - when the direction is relevant - would be indicated in meters or km. (plus a direction), a velocity in meters per second plus a direction, an acceleration in meters per second square, plus a direction. Electric field might be indicated in Volts / meter, if I remember correctly again, including an indicating the direction.
The direction of the electric field (E) determines the direction in which charged particles will move in a given system. Charged particles will move in the direction of the electric field if they are positive, and opposite to the direction of the electric field if they are negative.
One place you and look into would be Siemens. Siemens has many offers and products related to electric power. Another place you could check with would be your own electric company. If they can't help you they can certainly lead you in the right direction.
The direction of the electric force on charge a in the figure is towards the right.
The direction of the induced electric field is perpendicular to the change in magnetic field.