Electromagnetism

What does a rheostat control?

What does Rheostat controls? electron drift velocity or quantity of electrons? Rheostat

We know I=nAve
I=current
n=quantity of electron
A=conductor area
e=electron charge
v=drift velocity

(Asked  Partha)

Comments - What do you think?  Posted by admin - June 30, 2012 at 5:51 pm

Categories: alternating currents, Current Electricity, electrical appliances, Electromagnetism   Tags: , , , , , , ,

Collection of Problems received from Class 12 Physics

These problems were posted by Geena. Hope that we will be able to post the answers to these questions soon; each in a separate post. By the time visitors can attempt to post their answers as comments to this post. (Only selected posts will be published)   Please note that the answers are not published until the [...]

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Comments - What do you think?  Posted by Mathew Abraham - September 13, 2011 at 7:16 pm

Categories: Ask Physics, charge density, Electromagnetism, Interesting Questions, potential drop, Project, time answers   Tags: , , , , , , , , , , , , ,

Direction of magnetic field due to a current carrying conductor

“How do we know the direction of magnetic field around the current carrying conductor?” Asked Nikhil Incoming search terms:direction of magnetic field around a current carrying conductorDIRECTION OF MAGNETIC FIELD IN CURRENT CARRYING CONDUCTORmagne...

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Comments - What do you think?  Posted by Mathew Abraham - September 10, 2011 at 10:55 am

Categories: Ask Physics, Current Electricity, Electromagnetism, Magnetism, Project   Tags: , , , , , , , , , , , , ,

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