Final answer:
The electric field strength at a point is calculated using the formula E = k|Q|/r², where E is the electric field, k is Coulomb's constant, Q is the charge, and r is the distance from the charge. Electric field direction is away from positive charges, and magnitude is indicated by the density of field lines in drawings. The electric field vector can be represented by scalar components and direction angles using trigonometric relationships.
Step-by-step explanation:
Concerning the electric field strength and direction at a given point, several crucial physics principles can be applied. The electric field (E) due to a point charge (Q) has both a magnitude and a direction, thus it is a vector quantity. Its magnitude can be calculated using the formula E = k|Q|/r², where k is Coulomb's constant, |Q| is the magnitude of the charge, and r is the distance from the charge to the point of interest. The electric field vector at a point can be described by its scalar components Ex, Ey, and Ez, which represent the intensity of the field in the coordinate plane directions x, y, and z, respectively. The direction angle (E) of the electric field vector can be found using trigonometric relationships between these components.
Since the electric field produced by a charge Q at a distance of 5.00 mm is uniform and positive, its direction points radially away from charge Q. Drawings and diagrams with lines or arrows are often used to visualize both the electric field direction and magnitude, with the density of lines indicating field strength. Finally, the relationship of the electric field to the area vector is important when calculating flux and involves taking the dot product of the two.