Work Needed to Increase Electron Speed

In summary, the conversation discusses the amount of work required to increase the speed of an electron from rest to 0.52c. The equation E=Ymc^2 is used, and the resulting answer is 3.19821x10^-22 J or 1.998x10^-9 MeV. However, the correctness of this answer is questioned and the concept of work being equal to change in energy is mentioned. Ultimately, the issue is resolved and the correct answer is understood.
  • #1
DeadxBunny
30
0

Homework Statement


How much work must be done to increase the speed of an electron from rest to 0.52c?


Homework Equations


I don't know :)


The Attempt at a Solution


I tried E=Ymc^2 where Y = 1/[1-(v/c)^2]^1/2 and got 3.19821x10^-22 J which translates to 1.998x10^-9 MeV, but I don't think this answer is right. Could someone explain this one to me? Thanks! :biggrin:
 
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  • #2
Work = change in energy.

Does that help?
 
  • #3
Oh, duh! I feel stupid lol.. I got it now. Thanks! :blushing:

KoGs said:
Work = change in energy.

Does that help?
 
  • #4
No problem. I love helping people feel stupid :)
 

1. What is "Work Needed to Increase Electron Speed"?

"Work Needed to Increase Electron Speed" refers to the amount of energy that is required to accelerate an electron to a higher velocity. This concept is important in understanding the behavior and movement of electrons in various systems.

2. Why is it important to increase electron speed?

Increasing electron speed can have various applications in technology, such as in electronics, telecommunications, and energy production. It can also help in advancing our understanding of fundamental concepts in physics.

3. How is the work needed to increase electron speed calculated?

The work needed to increase electron speed can be calculated using the formula W = qV, where W is the work (in joules), q is the electron's charge (in coulombs), and V is the potential difference (in volts). This formula is derived from the basic principle of work being equal to force multiplied by distance.

4. Does the work needed to increase electron speed change in different environments?

Yes, the work needed to increase electron speed can vary in different environments. This is because the potential difference (V) can change depending on factors such as temperature, pressure, and the presence of electric fields. Therefore, the amount of energy required to increase an electron's speed can differ in different situations.

5. Can the work needed to increase electron speed be reduced?

Yes, the work needed to increase electron speed can be reduced by using methods such as applying a stronger electric field or changing the material through which the electron is traveling. This can help in achieving higher electron speeds with less energy input.

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