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Question bank: Electricity: Problems of Electric Forces and Fields

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Question 1:

Medium

João is studying the effects of the interaction between two point electric charges, one positive and the other negative, both fixed in space. Consider a positive charge of 2μC and a negative charge of -3μC, separated by a distance of 1.5m. João wants to calculate the intensity of the electric force and the intensity of the electric field generated by the negative charge at the point where the positive charge is located. What is the intensity of the electric force and the intensity of the electric field generated by the negative charge at the point where the positive charge is?

Electricity: Problems of Electric Forces and Fields

Question 2:

Easy

When a conductor is subjected to an electric current, what happens to the magnetic field?

Electricity: Problems of Electric Forces and Fields

Question 3:

Medium

Question illustration

Electricity: Problems of Electric Forces and Fields

Question illustration

Question 4:

Medium

A positive electric charge particle q and mass m is initially at rest at a point P. At a given moment, a particle with identical negative charge -q and the same mass m is launched from a point A, located at a distance d from P, with velocity v0 forming an angle θ with the line PA, as shown in the figure. Considering the electromagnetic interaction between the particles as the only acting force and that the electric field between them is uniform, answer: 1. What is the maximum electric force experienced by the negative particle during the movement due to the interaction with the positive particle? 2. Knowing that the negative particle reverses its direction of movement after passing through P, determine the expression for the electric field E between the particles as a function of the provided variables and fundamental constants. Consider that the Coulomb constant in vacuum is 8.9875 x 10^9 N m^2/C^2.

Electricity: Problems of Electric Forces and Fields

Multidisciplinary Question

Question 5:

Medium

Two equal positive charges are placed at a fixed distance from each other. Which of the alternatives below allows these charges to remain in static equilibrium?

Electricity: Problems of Electric Forces and Fields

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