The direction of flow of charge is determined by the potential difference between two points. Charge will flow from a point of higher potential to a point of lower potential. This is because electrons, which are negatively charged, are attracted to positively charged ions. When there is a potential difference between two points, electrons will flow from the negative point to the positive point in order to equalize the potential.

The potential difference between two points can be created in a number of ways. One way is to connect the points to a battery. A battery is a device that stores chemical energy and converts it into electrical energy. When a battery is connected to two points, it creates a potential difference between the points. This potential difference causes electrons to flow from the negative terminal of the battery to the positive terminal.

Another way to create a potential difference between two points is to use a generator. A generator is a device that converts mechanical energy into electrical energy. When a generator is turned on, it creates a rotating magnetic field. This magnetic field induces a voltage in a conductor that is placed in the field. The voltage induced in the conductor is proportional to the strength of the magnetic field and the speed of rotation of the generator.

The potential difference between two points can also be created by static electricity. Static electricity is the build-up of electrical charge on an object. When an object is charged, it has an excess of electrons or protons. If an object is positively charged, it has an excess of protons, and if an object is negatively charged, it has an excess of electrons. When two objects with opposite charges are brought close together, the electrons from the negatively charged object will be attracted to the protons on the positively charged object. This movement of electrons will create a current of electricity.