Physics 12.3.4c - Electric Field Example Problems

Example problems dealing is charged particles and electric fields. From the physics course by Derek Owens. The distance learning course is available at http://www.derekowens.com

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Education

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• Physics
• electric
• electricity
• electricity examples
• electric field examples
• electric field example
• electric field intensity
• homeschool
• distance learning
• Derek Owens

[nichtmuttersprachler]

There's another way to do the last problem. Use the kinematic equation (final velocity)^2 = (initial velocity)^2 + 2ad. We're given initial and final velocity, so we just need to rewrite the acceleration term to solve for displacement. Since F = ma and since the force of this electric field is F = -eE, we can rewrite acceleration as a = (-eE)/m. Now, just plug this acceleration into the original kinematics equation, isolate the displacement variable, plug in the actual numbers, and solve.

[derekowens]

@nichtmuttersprachler Yes, that is a very good approach. Sometimes there are two, or more, ways to solve a given problem. And of course they should all give the same answer.

[nhellin]

how did u get 1.6x10^19 ?

[derekowens]

@nhellin That's the charge on an electron (or on a proton). It's one of the fundamental constants in the universe.

[freighter014]

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[fatslug888]

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[louisvl10]

Thank you!! Very helpful

[gujli1]

youtube.com/user/93Rekay

[MiXtApEMesSiAh22]

Hey for the second problem could you have used the F=Kq1q2\r^2?

[feenokhan]

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[backyardbeachbum]

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