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22 lis 2022 · Learn how to solve problems on electric field with clear explanations, examples, and exercises. This article is suitable for grade 12 and college students.
17 lut 2023 · An electric field is an invisible force field caused by an electric charge. It is an alteration in the space (air or vacuum) around the charge. It results in an electric force that is felt by electric charges when placed close to one another.
The electric field of the Earth is due to the separation of charges between the surface of the Earth and the upper layers of the Earth's atmosphere. If the direction of the Earth's electric field points down, what is the sign of the charge on the Earth's surface? Explain your answer.
Find the magnitude and direction of the electric field at the five points indicated with open circles. Use these results and symmetry to find the electric field at as many points as possible without additional calculation.
Suppose a dipole is in an electric field \(\vec E\). Show that the dipole will experience simple harmonic motion if the angle between the dipole vector and the electric field vector is small. Answer. The only net torque on the dipole is from the force from the electric field: \[\begin{aligned} \tau = -pE\sin\theta \end{aligned}\]
The electric field, then, is the mechanism by which the electric properties of the source charge are transmitted to and through the rest of the universe. (Again, the range of the electric force is infinite.)
The droplet is negatively charged. When a certain potential difference is applied, it creates an electric field of strength E, keeping the droplet stationary. Find an equation for the droplet's charge q, given the electric field E and the droplet's weight mg.
