1.

Two identical small balls each have a mass m and charge q. When placed in a hemispherical bowl of radius R with frictionless, nonconductive walls, the bead move, and at equilibrium the line joining the balls is horizontal and the distance between them is R (see figure). Neglect any induced charge on the hemispherical bowl. Then the charge on each bead is : (here K=(1)/(4piepsilon_(0)))

Answer»

`Q=R((mg)/(Ksqrt(3)))^(1//2)`
`q=(R(mg)/(Ksqrt(3)))^(1//2)`
`q=R((SQRT(3)mg)/(K))^(1//2)`
`q=(R(sqrt(3)mg)/(K))^(1//2)`

ANSWER :A


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