In the circuit shown if a conducting wire is connected between points A and B, the current in this wire will :-

Answer

A

Explanation

Since mass `prop` area

Let mass of the bigger disc `= 4 M`
`:.` mass of the smaller disc = M
`:.` mass of the remaining posrtion `= 4M - M = 3M`
Now put the cut disc at its place again, centre of mass of the whole disc will be at centre O.
Centre of mass of the smaller disc is at its centre that is at B.
Suppose CM of the remaining portion is at A and `AO` is X, Let O as origin
`:. 3 M(x) = RM rArr x = (R )/(3)`
This suggests that centre of mass of remaining disc will shift from the centre of original disc by a distance of `(1//3)R` towards left.
`alpha(1)/(3)`.