Hello Rambabu,

        I appreciate your interest towards masters abroad Electrical and Electronics Engineering and I'm here to help you regarding your query !!

          There are no specific concepts to ve learnt to study masters in abroad. You should be strong enough technically and its not the thing which you can do in particular instance of time. You should have started right preparation from the first day itself. Many foreign universities are looking for talented people and also, prepare for exams such as GRE, etc.., Attend mock tests and practice previous year papers which is the key to success.

Hope you find my answer helpful !!

All the very best wishes!