Question

Why did the british people made the nawabs puppet rulers ???

Answer 1

The Nawabs of Bengal (full title, the Nawab Nizam of Bengal and Orissa) were the rulers of the then provinces of Bengal and Orissa. Between 1717 and 1765, they served as the rulers of the subah (or province) of Bengal. However, they were only nominally subordinate to the Mughal Empire. Siraj ud-Daulah, the last independent Nawab of Bengal was betrayed in the Battle of Plassey by Mir Jafar. He lost to the British, who took over the charge of Bengal in 1757, installed Mir Jafar on the Masnad (throne) and established itself to a political power in Bengal
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Answer 2

British people made the nawabs puppet rulers because British were known to the fact that Indians will only listen and follow the instructions of their nawabs and they also knew that indian nawabs were selfish and for the sake of money they will obey the British.