Trajectory of a test charge in electric field

[Fu-Kwun Hwang]

There are two fixed charge (red +/ blue negative) create an electric field around the test charge.
If the initial velocity of test charge is zero. What is the trajectory of the test charge?
Will it following the electric field line?

You can test your answer in the following post. Play with the simulation!
You can drag test change to another position and try it again ...

[Fu-Kwun Hwang]

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[downloadzip=fieldline.zip]

Registed user can get files related to this applet for offline access.
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hello my name is mr burnsi belive you have a message 4 me
ok mr burns whats ur first name ?
i dont know

I do not understand why the charge would not follow the direction of the field. It is the only one, it can not have an influence on electric field he fiels. Plus the initial velocity is zero. Or is it something else ....

Dejan

:shock:

[Fu-Kwun Hwang]

The tangential of the field line is the direction of the electric field.
From Newton's Law: The acceleration of the charge particle is propotional to the electric force.
So the acceleration of the charge is in the direction of the electric field.
The acceleration of the particle tell us how the velocity change with time.

The tangential of the trajectory is the direction of the velocity ( Not the change of velocity: acceleration).
When the velocity of the charge particle is zero, the direction of the velocity is the same as the direction of the acceleration. However, when the velocity of the charge is not zero, the electric field line provide the direction of acceleration (not the direction of the velocity). So the electric field line did not match with the trajectory of the particle.

[paco]

[color=darkred:6e8b4053b2][/color:6e8b4053b2]

[sunilbalani]

great work what will be the path if there is an intial velocity can that be worked out . can we down load applet to help students for offline usage.bye sunil balani M.E,MBA

[metwally]

<IMG src=/demolab/phpBB/pics/fieldLine.jpg>
There are two fixed charge (red +/ blue negative) create an electric field around the test charge.
If the initial velocity of test charge is zero. What is the trajectory of the test charge?
Will it following the electric field line?

You can test your answer in the following post. Play with the simulation!
You can drag test change to another position and try it again ...

Would you please allow me to download it?

[Fu-Kwun Hwang]

You should be able to download it now. It was created with physlet library.

[flg22]

Could you please email me the source code?  Thank you.

[Fu-Kwun Hwang]

The above simulation was created with physlet. You need to ask original author for the source code.

[jeff_forssell]

I don't think you will be able to get the source code for the physlets applets themselves. But they are free to use and you can make changes in a simulation like this one by going into the javascript code in the HTML page and changing it to fit your needs. It's probably all the "source code" you need. See the Physlets homepage for more info.

[Fu-Kwun Hwang]

However, you can download the jar file and the html page from the second message.
Just click "get files for offline use" button!