Coulombs Law and electric field in Electrostatics

Explore coulomb's law: the force between two charges q1 and q2 separated by distance is proportional to q1 q2 and inversely to r, attracting opposite charges and repelling like charges.

Explore how the relative permittivity and dielectric constant of a medium determine the electric field between charges, comparing the medium's permittivity to that of vacuum.

Apply coulomb's law to two point charges in a medium. The force between charges is reduced by the medium's dielectric constant, as in water.

Explore Coulomb's law in vector form by analyzing the electrostatic force between two charges, its magnitude and direction along the line joining them, and the equal and opposite action-reaction pair.

Apply Coulomb's law to compute the charge and separation in a two-charge system at equilibrium, illustrating numerical approaches to electric field and electrostatics.

Learn to apply Coulomb's law to two identical charged spheres, numerically calculating the electrostatic force as their separation changes and understanding how charge distributes after contact.

Examine how an electron placed between two point charges reaches equilibrium as the Coulomb forces balance, illustrating inverse-square dependence on distance and the setup of electrostatics.

Use Coulomb's law to analyze the electrostatic forces between identically charged spheres suspended in a medium, and explore how the electric constant and the dielectric environment influence outcomes.

Apply Coulomb's law to two like charges on a table, compute the electric repulsive force, and determine equilibrium by balancing friction and electrostatic forces.

Apply Coulomb's law to three charges at the vertices of an equilateral triangle to compute the force on one charge due to the other two, considering attractive and repulsive interactions.

Apply Coulomb's law to find the net force on a charge from multiple fixed charges on the x-axis, using inverse-square distances. Sum contributions to reveal the resulting electrostatic interaction.

Apply Coulomb's law to two charges of 1.0e-7 C and 5.0e-7 C separated by 0.1 m, compare electrostatic repulsion with friction to find the impending sliding threshold.

Explore how a source charge modifies space to create the electric field and define the electric field intensity as the field's strength measured by the force on a test charge.

Explore the electric field intensity of a point charge, its dependence on distance, and how to compute the force on a test charge using that field.

Explore electric field lines as imaginary paths that show the direction and strength of the field, emanating from positive charges and ending on negative charges, without crossing.

Electric field lines originate on positive charges and end on negative charges, never intersect or form closed loops. In a uniform field, lines are parallel and equidistant, perpendicular to surfaces.

Apply Coulomb's law to compute the electric field strength for a charged particle and analyze its motion under the resulting force, including displacement until the velocity becomes zero.

Examine an electron in a uniform electric field and gravity, and compute its acceleration, displacement, and time of motion.

Learn how a charged pendulum reaches equilibrium in a uniform horizontal electric field by balancing gravity and electric force, applying Coulomb’s law to determine the electric field.

Calculate the pendulum's period under an upward electric field by using g_eff = g − qE/m, then compare 20 oscillations before and after field; find 20 oscillations take 52 seconds.