Question

E. The field has a maghlt 8. The magnetic field in a region is given by 37. Which of the following would result in the greatest magnitude of potential difference due to the Hall effect across any two faces? A. Move the block in the positive r direction at a constant speed v. B. Move the block in the positive y direction at a constant speed e. C. Move the block in the positive z direction at a constant speed u D. Send a current from the bottom face to the top face, such that drift velocity of charge carriers is u. E. Not enough information to answer. Page 4 of 5

Answer 1

8. Ansi Given, B = 3 ŷ Cŷ direction) te z o î ñ directia) : far care 'A' Then force on the es fa (UXB) FL OB Ê in direction) ce on the es F ie dows 7 Wiederatin + + Hence Hall Voltage (VA) LeBW, Slopfleryon) For the case C Then Farce a oxB, Facebî (û directo b> БLaokth. (H)e-bon (sment)

For case B : u= uŹ BEB Farce & UXo = 0 : No farce at all; hence no separation between changes. Hence, Hall voltage, z o Now only possible answers are either (A) ar ro () Now out of these 'A' & 'C', since we know length > Breadth LeBlength) yub (Breadth) (VH) A7 (\HB. Hence, In arder to have max. potential difference. correct answaris : F AL