How Does a Potential Difference Affect Kinetic Energy of a Charged Particle?

In summary, a charged particle with a charge of -3e is accelerated through a potential difference of 200v, giving it a kinetic energy. The equation used to solve this problem is E=q.V, where q is the charge on the particle. The potential difference represents the amount of energy the particle gains while passing through it.
  • #1
pat666
709
0

Homework Statement



A particle with charge -3e is accelerated from rest through a potential difference of 200v .
This gives the particle a kinetic energy of?

Homework Equations





The Attempt at a Solution


what does a charge of -3e mean?(-3*2.71...?) to kind the KE wouldn't i need a mass too??
 
Physics news on Phys.org
  • #2
e = charge of an electron.
Try using conservation of energy?
 
  • #3
ok so the P.d = Ke??
I can't see that - can you give me a bit more please.
 
  • #4
when a charged particle passes through a PotDif it "gains energy." (from the fields) since this is a particle of (assumed) no internal structure, the energy it gains will be in kinetic, not potential. Therefore you don't need a mass, the question just wants the energy.

the equation you need is indeed E = q.V (where q is the charge on the particle)

to better understand this, remember that we assume the particle does not "see" the potential when it is at an infinite distance from it (potential **difference** from that at infinity).
So in essence, the value of KinEn is how much the potential "wants" the particle to pass through it.
 
Last edited:
  • #5
thanks Onamor - problem solved
 

FAQ: How Does a Potential Difference Affect Kinetic Energy of a Charged Particle?

1. What is particle kinetic energy?

Particle kinetic energy is the energy that a particle possesses due to its motion. It is a form of mechanical energy and is dependent on the mass and velocity of the particle.

2. How is particle kinetic energy calculated?

The formula for calculating particle kinetic energy is K.E. = 1/2 * m * v^2, where m is the mass of the particle and v is its velocity. The unit for particle kinetic energy is joules (J).

3. What is the relationship between particle kinetic energy and temperature?

Particle kinetic energy is directly proportional to the temperature of a substance. As the kinetic energy of the particles in a substance increases, so does its temperature. This is because an increase in kinetic energy leads to more frequent and faster particle collisions, which results in an increase in temperature.

4. How does particle kinetic energy affect the state of matter?

The state of matter is dependent on the average kinetic energy of its particles. When particles have low kinetic energy, they are in a solid state. As the kinetic energy increases, the particles break free from their fixed positions and the substance transitions into a liquid state. At even higher kinetic energy, the particles move even more freely and the substance becomes a gas.

5. Can particle kinetic energy be converted into other forms of energy?

Yes, particle kinetic energy can be converted into other forms of energy such as potential energy or thermal energy. For example, when a ball is thrown into the air, its kinetic energy is gradually converted into potential energy as it rises, and then back into kinetic energy as it falls. When particles collide and transfer energy, it can also result in an increase in thermal energy.

Similar threads

Back
Top