Using Bridging Analogies and Anchoring Intuitions to Deal with Students' Preconceptions in Physics

Researchers show that students in every level have diffuculty perceiving concepts and  have various misconception, preconception in science topics- especially in physics.  In the new approach which is developed under the conructivist theory , importance is  especially  given  to concept teaching with analogies. As known students have diffuculty to understand abstract physics concept . I understand that analogies mean similarities between concepts, principles and formulas in terms of some aspects. Analogies are bridges between similar characteristics of these concepts, principles and formulas. Prior knowledge is important at analogy. If students have prior knowledge , they teach easily new knowledge. Content, gain, new concept, students' character and connection between knowledge and target are important about improve analogy. Students and teacher create analogy together. My question:
1)How can we wipe out our preconceptions in physics topic as a teachers' candidate?
2)Do we give analogy examples always beginning new topic and new concept?