Physics EMT University Of Okara

The unit of electric charge is the coulomb. The coulomb is defined as the amount of electric charge transported by a constant current of one ampere in one second. It is named after the French physicist Charles-Augustin de Coulomb, who made significant contributions to the field of electromagnetism. The coulomb is used to measure the quantity of electric charge in various electrical and electronic systems.

Electric intensity is a vector quantity because it has both magnitude and direction. It describes the strength and direction of the electric field at a given point in space. The magnitude of the electric intensity represents the strength of the electric field, while the direction indicates the direction in which a positive test charge would move if placed at that point. Therefore, electric intensity is a vector quantity.

The electric field due to a positive charge is outward because positive charges repel each other. This means that if we place a positive test charge near the positive charge, it will experience a repulsive force and move away from the charge. The direction of the electric field is defined as the direction in which a positive test charge would move. Therefore, the electric field due to a positive charge points outward.

The electric field due to a negative charge is inward because negative charges repel each other. Therefore, the electric field lines originate from the negative charge and point towards it, indicating an inward direction.

The correct answer is Linear charge density. Linear charge density refers to the amount of charge per unit length along a line of charge. It is a measure of how much charge is distributed along a one-dimensional line. Surface charge density refers to the amount of charge per unit area on a two-dimensional surface, while volume charge density refers to the amount of charge per unit volume in a three-dimensional space. Therefore, the correct answer is linear charge density.