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A wheel having mass m has charges +q and...

A wheel having mass m has charges +q and –q on diametrically opposite points. It remains in equilibrium on a rough inclined plane in the presence of uniform vertical electric field E =

A

`(mg)/(q)`

B

`(mg)/(2q)`

C

`(mgtantheta)/(2q)`

D

none

Text Solution

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The correct Answer is:
B
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