please solve this puzzle in a unique way:

puzzle presents a problem that needs to be solved, using one device (digital scale) in an efficient manner (minimum scale readings) in order to discover forged coins, which weigh differently from the rest.

The Coins Puzzle

You have ten bags full of coins. In each bag are infinite coins. But one bag is full of forgeries, and you cant remember which one. But you do know that a genuine coin weighs 1 gram, but forgeries weigh 1.1 grams. You have to identify that bag in minimum readings. You are provided with a digital weighing machine.

please answer me in less than 2 hours