Why phi component is not taken into account for vector R ?See attachment.

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1. Oct 31, 2015

Saurabh Sharma

Why phi component is not taken into account while calculation electric field intensity due to line charge?See attachment for details.https://physicsforums-bernhardtmediall.netdna-ssl.com/data/attachments/74/74211-22d26b27211fd4b186955b890458804e.jpg [Broken] https://physicsforums-bernhardtmediall.netdna-ssl.com/data/attachments/74/74212-c0d171ced27ce079690ae1924ecc7a04.jpg [Broken]

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Last edited by a moderator: May 7, 2017
2. Oct 31, 2015

Orodruin

Staff Emeritus
The position vector in cylinder coordinates does not have a $\varphi$ component, it is given by $\vec r = \rho \vec e_\rho + z\vec e_z$.

3. Oct 31, 2015

Saurabh Sharma

Thanks for you help.