THE LOOPS WILL REPEL AND THE BIMETALLIC STRIP INVOLVES ENERGY CONVERSION.... ITS CLEAR AND FINAL... NO MORE STUPID COMMENTS ON THESE 2 QUES. If nyone wants to see the exact written explanation then go to www.123iitjee.com PLEASE COMMENT ON BAND GAP QUES. Yeah... 0.68eV is not an infinitismal small band gap....its an appreciable one... infinitismal means something not measurable... rite Akhungar...