Current through point or cross sectional area refers to the amount of electric current flowing through a specific point or cross section of a conductor. It is measured in amperes (A) and represents the rate of flow of electric charges.
Current through point or cross sectional area can be calculated by dividing the total charge passing through a point or cross section by the time it takes for that charge to pass. This is represented by the equation I = Q/t, where I is the current, Q is the charge, and t is the time.
The current through point or cross sectional area is affected by the voltage applied to the conductor, the resistance of the conductor, and the length and cross sectional area of the conductor. A higher voltage or larger cross sectional area will result in a higher current, while a longer conductor or higher resistance will result in a lower current.
The current through point or cross sectional area is important because it determines the amount of power being transmitted through a conductor. It is also a crucial factor in the design and functioning of electrical circuits and devices.
The current through point or cross sectional area can be measured using a device called an ammeter, which is connected in series with the conductor. The ammeter measures the amount of current flowing through the conductor and displays it in amperes.