ElectrostaticsHard
Question
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. The value of E is :
Options
A.
B.
C.
D.None
Solution
For rotational equilibrium, ∑τP = 0
⇒ mg a cosα - qE (2a cos α) = 0 ⇒ E =
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