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 $=$

• A. $\frac{\mu g}{q}$
• B. $\frac{\mu g}{2q}$
• C. $\frac{\mu g\tan \theta }{2q}$
• D. None of these

Answer 1

The correct option is B $\frac{\mu g}{2q}$