ATH asked in Science & MathematicsPhysics · 7 years ago

A positive charge moves in a direction opposite to that of an electric field.?

A positive charge moves in a direction opposite to that of an electric field. What happens to the energy associated with the charge?

The electric potential energy of the charge increases, and the kinetic energy decreases.

Both the electric potential energy and the kinetic energy of the charge decrease.

Both the electric potential energy and the kinetic energy of the charge increase.

The electric potential energy of the charge decreases, and the kinetic energy increases.

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  • 7 years ago
    Favorite Answer

    The direction of the electric field is the direction of the force on a +ve charge. So the charge is being moving against the force of the electric field on it. Work is being done (force x distance), which is stored as electric potential energy. What happens to the kinetic energy of the particle depends on whether there are other forces acting on it. If there are no other forced acting on the particle (eg gravity), then the total energy is constant, so as the PE increases the KE decreases. However, if the particle is being pushed or pulled, eg by gravity, the kinetic energy could change differently.

    Assuming that the electrical force is the only force here, the first answer is correct - PE increases, KE decreases.

  • 4 years ago

    The electric potential energy of the charge increases, and the kinetic energy decreases.

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