What is the speed of a proton after moving in a uniform electric field?

In summary, a proton with a speed of 2.3x10^4 m/s moves in a uniform electric field with a magnitude of 3.0x10^3 N/C. After traveling a distance of .003 m, its speed can be calculated using the equation F=qE and a kinematics equation. The charge of a proton is equivalent to the magnitude of an electron's charge, which is 1.6*10^-19 C. Once the negative sign is taken into account, the problem can be solved.
  • #1
NeoKrypt
4
0
A uniform electric field has a magnitude of 3.0x10^3 N/C. In a vacuum, a proton begins with a speed of 2.3x10^4 m/s and moves in the direction of this field. Find the speed of the proton after it has moved a distance of .003 m.

I try to work out the problem with the equation F=qE to find the acceleration and plug that into a kinematics equation, but I do not have q. Can anyone help?
 
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  • #2
You are told it is a proton, so it has a charge equal in magnitude to an electron (with opposite sign). 1.6*10^-19 C, I think. You should look it up in your textbook.
 
  • #3
ah got it! I actually tried that just before I posted on here except I left the negative sign on the charge. Thanks alot!
 

Related to What is the speed of a proton after moving in a uniform electric field?

1. What is an electric field?

An electric field is a physical quantity that describes the influence that electrically charged objects have on each other. It is a vector field that is created by the presence of charged particles and can be thought of as the force per unit charge at a given point in space.

2. What is the difference between an electric field and an electric potential?

While both electric fields and electric potentials are related to the presence of charged particles, they are different physical quantities. An electric field is a vector quantity, while an electric potential is a scalar quantity. Additionally, an electric field describes the force per unit charge at a given point, while an electric potential describes the potential energy per unit charge at a given point.

3. How is the strength of an electric field measured?

The strength of an electric field is measured in units of volts per meter (V/m). This quantity represents the amount of force that would be exerted on a unit charge placed in the electric field.

4. How does the presence of conductors and insulators affect an electric field?

Conductors, which allow the flow of electric charge, can affect an electric field by redistributing charges and altering the field lines. Insulators, on the other hand, do not allow the flow of electric charge and have little effect on the electric field.

5. What are some real-world applications of electric fields?

Electric fields have a wide range of applications, including powering electronic devices, generating electricity, and in medical procedures such as MRI scans. They are also used in technologies such as capacitors, electric motors, and telecommunication systems.

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