What is the different between effective and efficient in using?

Effective means accomplishing the intended result. Efficient adds the sense of accomplishing the intended result with the minimum waste or effort.

Efficiency refers to doing things in a right manner. Scientifically, it is defined as the output to input ratio and focuses on getting the maximum output with minimum resources. Effectiveness, on the other hand, refers to doing the right things. It constantly measures if the actual output meets the desired output.