Masses `m`,` 2m`, `3m`, `4m`,………,`12m` are kept on the peripheri of a clock having a circular dial. The masses are kept such that `m` is kept at `1, `2m` is kept at `2`, `3m` at `3`………`12m` at `12` . `vec g` is the gravitational field intensity at the centre of dial.

Options

A. At `9 : 30` the hour hand is in the direction of `vecg`
B. At `3 : 30` the hour hand is in the direction of `vecg`
C. there will be no component of `vecg` along hour hand at `6 : 30`
D. There will be no component of `vecg` along hour hand at `12 : 30`

Explanation

The field will be in the direction lying exactly between `9` and `10`.
`rArr A`, `C`, `D` are correct.