3 electro-exercises, .

  • Thread starter claudiadeluca
  • Start date
In summary, the conversation involves a request for help with three exercises: finding electric and potential fields for a charged system, determining the minimum distance between two protons in motion, and finding the required intensity and direction of an electric field to hold a charged particle in equilibrium. The applicable equations and laws for each problem are discussed, including the conservation of energy and the influence of force and mass.
  • #1
claudiadeluca
9
0
The physical terms might not be the right english ones, I am not english. I hope you will understand anyway. I need help with the 3 following exercises, if anyone could dedicate some time to them I would be really grateful. Thank you.

Homework Statement



1) Determine the electric and potential fields in all the space for a system composed of a sphere of radius=R, equally charged with charge=Q, surrounded by a spherical conductor crown with internal radius=R and external radius=r.

2) A proton is fired toward another proton, which is steady at a great distance, with speed v= 2.4 * 10^8 m/s. Find the minimal distance between the two protons.

3) We have a vertical electric field. How intense must it be and what direction must it have to hold a particle in equilibrium? The particle has mass = 10^-8 g and is charged with q= 1.7 * 10^-9 C.

Thank you very much in advance.
 
Physics news on Phys.org
  • #2
How about writing the applicable equations for each problem. What equations apply in each case?

In the first problem, it appears one has a 'spherical shell' conductor. There is an electric field inside, and one outside. What law applies?

In the second one proton starts far away from the other, so think about the total kinetic energy, conservation of energy, and the electric potential energy when both protons are at rest.

In the third problem, what is the significance of the force acting vertically, and what is its influence with respect to a particle's mass?
 
  • #3


Hello,

Thank you for reaching out for help with these exercises. I am happy to assist you in finding solutions to these problems.

For the first exercise, we can use the principle of superposition to determine the electric and potential fields for the given system. The electric field at any point in space is the sum of the electric fields due to each individual charge. The potential field, on the other hand, is the sum of the potential fields due to each individual charge. We can use the equations for electric and potential fields of a point charge to calculate the fields for the sphere and the spherical conductor crown separately, and then add them together.

For the second exercise, we can use the equation for electric force between two charges to determine the minimum distance between the two protons. We know the speed of the first proton and the stationary position of the second proton, so we can use the equation to calculate the force between them. The minimum distance will be the distance at which the force between the two protons is equal to the force required to keep the first proton moving at a constant speed.

For the third exercise, we can use the equation for the electric force on a charged particle in an electric field to determine the intensity and direction of the electric field required to hold the particle in equilibrium. We know the mass and charge of the particle, so we can use the equation to calculate the force on the particle. The direction of the electric field will be opposite to the direction of the force on the particle, and the intensity can be calculated using the equation for electric field intensity.

I hope this helps you with your exercises. If you need further assistance or clarification, please do not hesitate to reach out. Best of luck!
 

What are electro-exercises?

Electro-exercises are physical exercises that use electrical stimulation to activate muscles and enhance muscle contractions.

What are the benefits of electro-exercises?

Some potential benefits of electro-exercises include increased muscle strength and endurance, improved muscle recovery, and enhanced blood circulation.

Are electro-exercises safe?

Electro-exercises can be safe when performed correctly and under the supervision of a trained professional. However, they may not be suitable for everyone and could potentially cause harm if used improperly.

What types of electro-exercises are there?

There are various types of electro-exercises, including electro-muscular stimulation (EMS), transcutaneous electrical nerve stimulation (TENS), and functional electrical stimulation (FES).

What are the potential risks of electro-exercises?

Some potential risks of electro-exercises include skin irritation or burns, muscle soreness, and interference with pacemakers or other medical devices. It is essential to consult with a healthcare professional before starting any electro-exercise program.

Similar threads

  • Introductory Physics Homework Help
Replies
17
Views
285
  • Introductory Physics Homework Help
Replies
23
Views
257
  • Introductory Physics Homework Help
Replies
4
Views
1K
  • Introductory Physics Homework Help
Replies
11
Views
597
  • Introductory Physics Homework Help
Replies
2
Views
472
  • Introductory Physics Homework Help
Replies
6
Views
589
  • Introductory Physics Homework Help
Replies
1
Views
714
  • Introductory Physics Homework Help
Replies
4
Views
161
  • Introductory Physics Homework Help
Replies
8
Views
1K
  • Introductory Physics Homework Help
Replies
12
Views
2K
Back
Top