09.18: A wire has a conventional current I directed to the right. At the indvtvut0)6m-h ta8q n900ry (p lzx(sostant shown in the figure, an electron has a velocity directed to the left. The magnetic force on the electron at this ins r9d0(s 0puozt)v (06qvxtayhtn 8-mltant is

  14.24: For the bar magnet shown in the vtrlg -:/ :aeefigure, which choice best describes the direction of the magnetic field at the poin:l r/atg:eev-t P located directly above the center of the magnet?

  11.34: A wire lies in the plane of the page with conventionalb9x fj9x0-cw1jcvx 5 t current I shown. At the instant shown, what is the direction of the magnetic ffxc x 9vb9cxjjw0 -51torce on the electron that is moving directly to the right toward the wire?

  13.30: Electrons flow to the left in a wl+ts e6dymn ,zwn)b *kh v,.8tire as shown. For the proton moving toward the top of the page at the instant shown, wha68)n w l*tsm.de+hzkny,,b tvt is the direction of the magnetic force on the proton?

  94.30: The conventional current I in a long straight wire flows in thcs5-6/h0pbha 0*q es ahvej+me upward direction as shown in the figure. (Electron flow is downward.) At the instant a proton of charge +e is a distance R from 6m-hac e5 ep+v/ahqs0h*b s0jthe wire and heading directly toward it, the force on the proton is:

  95.16: A charged particle with constant 9,*sp-ix kpduxf ,zg9speed enters a uniform magnetic field whose direction is perpendicular to the particle’s veloci isuf-*x9,p9kxpgd ,zty. The particle will:

  98.10: A charged particle with constant velocity ent7sa gu*wpx cckrwoi43l9d/ - *g1t y3vers a uniform magnetic field whose direction is parallel to the particle’s velocity. The particle wi 1*3uy3cd*pa clxwiog4-7s/vw gk r9tll

  03.34: A positively charged particle of mass M is at rest onsxl0-pu / jt)pd q/*ux a table. A non- zero electric field E is directed into the pdx-q/l su/jxu* 0pt) plane of the table. A non-zero magnetic field B is directed out of the plane of the table. What is true about the magnitude of the electric force on the particle $F_E$ compared to the magneti force on the particle $F_B$?

  16.24: A proton moves with constant non-zeroe84 mn7j)cf ij velocity in a region of space that has a uniform magnetic field directed into the plane of the paf mc j)jn847eige. The proton moves directly up the plane of the page. What is the direction of the electric field in this region of space? Ignore gravity

  04.14: A positive electric charge of negligible weight is released from resuv6 mdl, rp4l8t between the poles of a horseshoe magnet as shown. What would be the directioud,6 4vp8 lrmln of the acceleration of the charge caused by the magnetic field?

  10.26: An electron moving in the plane of the page at an angle of 300 ticy7(:qn2epw o the horizontal enters a region with a constant magnetic field directed horizontally in the plane of the page as shown. At the instant that the electron enters the magnetic field, which best describes the direction of the resulting magnetic force on th 7qc:n pwi2e(ye electron?

  11.29: An electron moves with 2g3o9 nxku ;kyspeed $1.00× 10^3\: m/s$ as it enters a region of space that has only a uniform magnetic field. The electron is accelerated because of this field with a constant magnitude of $8.00× 10^5\: m/s^2$ for the entire time of $1.00× 10^{−3}s $ that it is in the field. With what speed would the electron exit the field? Ignore gravity.

  14.29 An electron with charge −e and mass m travels fms6uoomk:8wv/lz )g ;, ihx3 at a speed v in a plane perpendicular to a magnetic field of magnitude B. The e3hivl w /x)ofg8 k,:6mmu o;szlectron follows a circular path of radius R. In a time t, the electron travels halfway around the circle. What is the amount of work done by the magnetic force on the electron in this time?

  97.28: An ion with charge q, mass m, and speed v enters a magnat)p(h9r b+yn etic field B and is deflected into a path with a radius of curvature R. If a second ion has speed 2v, while m, q, and B are unchanged, what will be the radius of the second ion’s patapbrh)y(+ 9t nh?

  16.44: A proton moves in a circulll)vh 2 s4u/swmv,yy(ar orbit in a uniform magnetic field B. A helium nucleus moves in a circular orbit in the same magnetic field. If each particle experiences the same magnitude magnetic force during its motion, what is the ralmu,l (v4yv /syw)2shtio of the speed of the helium to the speed of the proton?

  10.43: Two ions travel perpendicular to the same uniform magnetic field. The ionlev sl 68fpbtuzua:+2-g 5)lc s carry the same charg8blt6:v 5 c2pfu g-al+ze )slue and have the same path radius in the magnetic field. Which of the following quantities must be the same for the two ions?

  02.15: A positively charged particle moves to the right. It enters a region of s;(txd mkyb +f3x f80u4rb /ggopace in 0f/dubmgrtkgoxxb8+ y3 f (4;which there is an electric field directed up the plane of the paper (see figure). In which direction does a magnetic field have to point in this region so that the particle maintains a constant velocity?

  96.40: A proton of mass M and kinetic enerje +nwj45:x8sux n j9mw m2q)sgy $E_k$ passes undeflected through a region with electric
and magnetic fields perpendicular to each other. The electric field has magnitude E. The magnitude
of the magnetic field B is:

  04.25: The speed of electrically charged beta particles:etjvm*19a /ee*v4oaob j 8cl is commonly determined by* /lomb avvetoj9ea:*48 1jce

  09.27: A proton moves straight up the planep30o83f rs n,d12riyrl bdtw p8mihmhds7 3 .- of this page into a region that has a magnetic field directed to the right. If the particle is undeflected as it passes through this region, in what direction must there be a component of electric field? Ignore gravity.sd8bi 13n-8,3 y polri2t3 w.7sr0dh pdfhmmr

  08.36: An electron mogo4a i d3g8yyf4e 7v4tves in the plane of the page through two regions of space along the dotted-line trajectory shown in the figure. There is a uniform electric field in Region I directed into the plane of the page (as shown). There is no electric field in Region II. What is a necessary di47 t4yoga8g4vy3 fedirection of the magnetic field in regions I and II?
Ignore gravitational forces.

  12.36: A positive charge moves with constant velong9 pj 0yv5s-fcity through a region of space cont- 5p0y9fvnsg jaining both an
electric field and a magnetic field. The electric field is directed out of the plane of the page.
Ignoring any gravitational field, which one of the following choices represents possible directions
of both the particle’s velocity and the total magnetic field in the region of space?

  15.29: An electron moves at constant non-zero velocity dire 2 4i /.r5+/dqjadrajbfl4yijctly between two long straight wires. The conventional current in each wire has the same magnitude, but the currents are in opposite directions as shown in the figure. Ignoring grajaa4f/d+/ b qy4j2idjir5l.rvity, which choice best reflects the direction of the magnetic field and the direction of the electric field that exist at the location of the electron? Any electric field in the region originates from an unseen external source.