Velocity Selector Homework: Determine Proton Speed for No Deflection

  • Thread starter Thread starter Ryo124
  • Start date Start date
  • Tags Tags
    Velocity
AI Thread Summary
To determine the proton speed for no deflection in the presence of electric and magnetic fields, the forces acting on the proton must be balanced. The electric field strength is 1.30×10^5 V/m, while the magnetic field strength is 2.30 T. The magnetic force, given by F = qv x B, must equal the electric force to achieve constant velocity. The required speed can be calculated by equating the magnitudes of these forces. Understanding the relationship between electric and magnetic forces is crucial for solving this problem.
Ryo124
Messages
101
Reaction score
0

Homework Statement



A proton enters a space in which there are both electric and magnetic fields. The electric field points vertically upward and the strength is 1.30×105 V/m. The magnetic field points horizontally to the right and the strength is 2.30 T.

The proton enters with a velocity vector that is perpendicular to both the electric and magnetic fields, and the magnetic force is opposite to the electric force.

Determine the proton speed such that the proton will pass through the space with no deflection, i.e., with a constant velocity vector.

Homework Equations



I am not sure what equation to use.

The Attempt at a Solution



Can someone please help? I'm not sure where to begin.
 
Physics news on Phys.org
Ryo124 said:

Homework Statement



A proton enters a space in which there are both electric and magnetic fields. The electric field points vertically upward and the strength is 1.30×105 V/m. The magnetic field points horizontally to the right and the strength is 2.30 T.

The proton enters with a velocity vector that is perpendicular to both the electric and magnetic fields, and the magnetic force is opposite to the electric force.

Determine the proton speed such that the proton will pass through the space with no deflection, i.e., with a constant velocity vector.

Homework Equations



I am not sure what equation to use.

The Attempt at a Solution



Can someone please help? I'm not sure where to begin.

F = qv x B

You will need to offset the electric force with the force created by qv x B.
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Thread 'A bead-mass oscillatory system problem'
I can't figure out how to find the velocity of the particle at 37 degrees. Basically the bead moves with velocity towards right let's call it v1. The particle moves with some velocity v2. In frame of the bead, the particle is performing circular motion. So v of particle wrt bead would be perpendicular to the string. But how would I find the velocity of particle in ground frame? I tried using vectors to figure it out and the angle is coming out to be extremely long. One equation is by work...
Back
Top