Why do negative charges spontaneously accelerate when they move to?

In summary, the conversation discusses the concept of negative charges spontaneously accelerating and increasing in kinetic energy as they move towards a point of higher potential. The questioner is confused about how this works theoretically, as it seems contradictory that the electron would lose potential energy while jumping to a higher potential. The responder clarifies that this is due to the negative charge of the electron, which results in the opposite potential energy compared to a positive charge.
  • #1
needingtoknow
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Homework Statement



Why do negative charges spontaneously accelerate?

The book I am studying from asked me to verify this statement:

Negative charges spontaneously accelerate and increase in kinetic energy when they move toward a point of higher potential.

I don't understand why this is the case from a theoretical point of view. I understand why it works according to the formula, but practically if an electron moves to a point of higher potential that means that some of the kinetic energy has been converted to potential energy which means it should slow down right?
 
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  • #2
The electron jumps to a higher orbit so it is farther from the positive nucleus, which means it has jumped to a point of higher potential. However, because it's charge is negative, its change in potential energy is negative which means to go to a higher energy level it has lost potential energy even though it jumped to a point of higher potential. That doesn't seem like it makes sense though. How come it is jumping to a higher potential yet it is losing potential energy?
 
  • #3
It is exactly what you said. The electric potential tells you what the potential energy of a positive test charge would be. A negative charge would have the opposite force and thus the opposite potential energy.
 

Related to Why do negative charges spontaneously accelerate when they move to?

1. Why do negative charges spontaneously accelerate?

Negative charges spontaneously accelerate because of the principles of electrostatics. When two objects have opposite charges, they will be attracted to each other and will accelerate towards one another. In the case of a negative charge moving towards a positive charge, the negative charge will accelerate towards the positive charge because of the attractive force between opposite charges.

2. What causes negative charges to move?

Negative charges move because of the presence of an electric field. When an electric field is present, charges will experience a force in the direction of the field. Since negative charges are attracted to positive charges, they will move in the direction of the electric field.

3. Why do negative charges accelerate when they move?

Negative charges accelerate when they move because of the force exerted on them by an electric field. The strength of the electric field determines the magnitude of the force, and the acceleration of the negative charge will depend on its mass.

4. How does the movement of negative charges affect their acceleration?

The movement of negative charges does not affect their acceleration. The acceleration of a charge is solely determined by the electric field and the mass of the charge. However, the velocity of the charge will increase as it accelerates, leading to a change in its kinetic energy.

5. Is the acceleration of negative charges always constant?

No, the acceleration of negative charges is not always constant. The acceleration will depend on the strength of the electric field, the mass of the charge, and any other forces acting on the charge. If the electric field or other forces change, the acceleration of the charge may also change.

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