Assig nmentid 2252604 219 24 03 2013 hw 5 par t a

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 4 2/19 24 03 2013 HW- 5 Par t A Find , the elec tric field ins ide the c ube. Ex pre ss the e le ctric fie ld in te rm s of , , a nd unit ve ctors ( , , a nd/or ). Hin t 1. Net force on charges in a conductor Elec trons in a c onduc tor are more or les s free to move within the c onduc tor. As a res ult elec trons in a c onduc tor plac ed in an elec tric field (with no magnetic field pres ent) will move until the elec tic field that they generate ins ide the c onduc tor c anc els the applied field (i.e., until the net internal elec tric field equals z ero). In general, the c harges in a c onduc tor move until the net forc e on them is z ero. This happens almos t ins tantaneous ly in a good c onduc tor. In this problem, there is no ex ternal elec tric field but there is a forc e on the elec trons due to the applied magnetic field. The elec trons will thus move in s uc h a way as to c reate an elec tric field that will c anc el the magnetic forc e on them (leaving a net forc e of z ero on the elec trons ). Hin t 2. F ind the magnetic force magnitude W hat is , the magnitude of the forc e due to the magnetic field ex erted on an elec tron with c harge ins ide the c ube? Ex pre ss your a nsw e r in te rm s of som e or a ll of the va ria ble s , , a nd . ANSW ER: = Hin t 3. F ind the magnetic force direction Us e the vec tor equation and the right-hand rule to determine the direc tion of the forc e from the magnetic field. Remember to us e Answ e r in te rm s of the unit ve ctors , , a nd for the elec tron c harge. . ANSW ER: Hin t 4. Determine the force due to the electric field W hat is , the forc e on an elec tron ins ide the c ube with c harge elec tric field due to an induc ed ? Ex pre ss your a nsw e r in te rm s of one or both of the va ria ble s a nd . ANSW ER: session.master ing nmentPr intView?assig nmentID= 2252604 3/19 24 03 2013 HW- 5 = ANSW ER: = Correct Now, ins tead of elec trons , s uppos e that the free c harges have pos itive c harge . Ex amples inc lude "holes " in s emic onduc tors...
View Full Document

Ask a homework question - tutors are online