i) Addn Depreciation is not available on the plant which is eligible for 100% Depreciation claim in the year of its acquisition.
ii) Now in another case u have acquired the plant in Sep10 and used it for less than 180 days, in this case Explanation to Sec 32 is attracted and u can claim only half the rate of normal as well as addn. depreciation. So in this case u will be entitled to claim 7.5% dep at normal rate and 10% addn dep.
U cannot claim the remaining 10% of addn dep in next year