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A wheel having mass mu has charges +q an...

A wheel having mass `mu` 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

`(mq)/(q)`

B

`(mg)/(2q)`

C

`(m g tan theta)/(2q)`

D

None

Text Solution

Verified by Experts

The correct Answer is:
B
Pe=m gain `theta R` (Balancing torque about point of contact)
`E=(mq)/(2q)`
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