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CH 20 HW 4 F2008

# CH 20 HW 4 F2008 - CH 20 HW 4 F2008 11:41 PM WebAssign CH...

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10/30/08 11:41 PM CH 20 HW 4 F2008 Page 1 of 4 http://www.webassign.net/[email protected]/[email protected] CH 20 HW 4 F2008 (Homework) BAKER KRISTINE NICOLE PY 208M, section 004, Fall 2008 Instructor: Laura I. Clarke Web Assign Current Score: 29 out of 29 Due: Friday, October 31, 2008 12:30 PM EDT Description Electric and magnetic forces; Hall effect Instructions The reasoning used in problems 1 and 2 will be useful in problem 3. 1. A proton moves at constant velocity in the +y direction, through a region in which there is an electric field and a magnetic field. The electric field is in the +x direction, and has magnitude 500 V/m. The magnetic field is in the -z direction, and has magnitude 0.85 T. What is the magnitude of the net force on the proton? F net = N What is the speed of the proton? v = m/s 2. A copper wire with square cross section carries a conventional current I in the -z direction. There is a magnetic field B in the +y direction. Draw a diagram illustrating the situation, to help you answer the following questions. What is the direction of E parallel , the electric field that causes the current to flow? -z What is the direction of the drift velocity of the mobile electrons? +z What is the direction of the magnetic force on the moving electrons? +x What is the direction of E transverse , the electric field due to the Hall effect, inside the wire? +x If the mobile charges had been positive (holes) instead of negative, what would have been 0 588.23

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CH 20 HW 4 F2008 - CH 20 HW 4 F2008 11:41 PM WebAssign CH...

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