hello my friend . . . . . !

i have to give an electrical seminar in my college .
i am interested in the topics
---> Surge Current Protection Using Superconductors
---> Liquid Electricity
---> Electrical Impedance Tomography Or EIT
---> Magnetic Resonance Imaging
---> Adaptive Piezoelectric energy harvesting circuit

sorry for choosing more than one topic . infact i am confused what will be the best .

plz plz plz help me in getting the seminar i am in hurry .
i know that the presentation having many pictorial view , to the point things easily understandable will be aatractive.

For making report on the seminar one should have thorough knowledge on the topic.

i have lots of expectations from you . plz help me to the best of your ability. i will be very very thankful to you.