09.18: A wire has a conventional curzn4iccpo g,lp :m 560rrent I directed to the right. At the instant shown in the figure, an electron has a velocity directed to the left. The magnetic force :pr 5 4zgm,ilco 0c6pnon the electron at this instant is

  14.24: For the bar magnet shown in the figure, which choice best describes the dyu 0/jym(6aokqs2 + diirection of the magnetic field at the point P located directly above the center of the ma( yoy+jus i/dkma06q 2gnet?

  11.34: A wire lies in the plane of the page with conventional cu,8 y7u mhnru/yrrent I shown. At the instant shown, what is the dire 7,r/mnyuy 8huction of the magnetic force on the electron that is moving directly to the right toward the wire?

  13.30: Electrons flow to the left in a wire as shown. F e0s hh-v.a2jto-kiu (or the proton moving toward the top of the page at th -uthieahs.(-02vj ko e instant shown, what is the direction of the magnetic force on the proton?

  94.30: The conventional current I in a long straight wire-lmb* 5l20+pjaaa l2fck0 u2;dgod cd flows in the upward direction as shown in the figure. (Electron flow is downward.) At the instant a proton of charge ab5ll-0ckd*co2gmdf2 0da2a+p j lu; +e is a distance R from the wire and heading directly toward it, the force on the proton is:

  95.16: A charged particle with constant sper:io fjy x;gzt)8 +f,ved enters a uniform magnetic field whose direction is perpendicular to tv8 x:z f)+ ;,irfotgjyhe particle’s velocity. The particle will:

  98.10: A charged particle with constant velocity entersg2m.aedl17ka+fl4, woriis 3 whu .h1 a uniform magnetic field whose direction is parallel to the particle’s velocity. The particle willhafw i 3+im7ous ,hla41gr2.ld1.ke w

  03.34: A positively chargo vi;rj6g+0i)rx9 puned particle of mass M is at rest on a table. A non- zero electric field E is directed into the plane of the table. A non-zero magnetic field B is directed out of the plane of the table. What is true a0x9r;6 gnu)ri+pv oj ibout 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 constankgt g-kh :vf dau7-k)*d l1- l5bvhd)ht non-zero velocity in a region of space that has a uniform magnetic field directed into the plane of the page. The proton moves directly up the plane of the page. Whatvk-u*hgd)1 7:fdg)-lkl- kbatv d hh5 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 f e:88cnnokb7h h1 l-iprom rest between the poles of a horseshoe magnet as shown. b7:ohkp -c einhl18 8nWhat would be the direction of the acceleration of the charge caused by the magnetic field?

  10.26: An electron movin(a7xvo):zr/ /n rqf-ix tbqq;g in the plane of the page at an angle of 300 to 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 o b trnq i(fqx/r; /z-ax:7)vqon the electron?

  11.29: An electron mo a*oi4klkyg o5z 61q;rves with speed $1.00× 10^3\: m/s$ 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 at a+z-xyh sbbwb5jvb6qw ( u,;7a speed v in a plane perpendicular to a magnetic field of magnitude B. The electron follows a circular path of radius R. In a time t, the electron travels halfway around the circle. What isbqxa +(b b7sv65uhww -; byj,z 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 yv .b(8b ncd2a bm2 : miy;;whyvd8x2pv enters a magnetic field B and is deflected into a path with a radius of curvature R. 2:y2 i;dp yaxc;mhym2vd8b( .n8bwb v If a second ion has speed 2v, while m, q, and B are unchanged, what will be the radius of the second ion’s path?

  16.44: A proton moves l:bnpmof o9k4i0p-1 win a circular orbit in a uniform magnetic field B. A helium nucleus moves in a circullk n0-f oo9w 1ip4:bpmar orbit in the same magnetic field. If each particle experiences the same magnitude magnetic force during its motion, what is the ratio of the speed of the helium to the speed of the proton?

  10.43: Two ions travel perpendicular to the same uniform magnetic field. Ttm xs(+lm t6*che ions carry the same charge and have the sm 6c(sxt *+ltmame 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 g /vh us;zf9ob)4lsz,enters a region of space in 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 ;g9,/szh)loufz4 bsvso that the particle maintains a constant velocity?

  96.40: A proton of mass M andcu ne41(zir4lx hw5w 2 kinetic energy $E_k$ 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 emj2235cemwpihm n6r7* a, lc6t lr5/wmquu; a lectrically charged beta particles is commonly determined byt/l u6munq75m5w, jac rm2 p2cmawl e* i3h;6r

  09.27: A proton moves straight up the plane of this page into a region thaqpu4-;awx z daqv; sc0: /mk:vt has a magnetic field directed to the right. If the particvxua:w0 c ;/skvam4dq;p-z: qle is undeflected as it passes through this region, in what direction must there be a component of electric field? Ignore gravity.

  08.36: An electron moves in oq4h;kwdw9:ju7+ enxj5 9tmnfk3jeb :d+q7 u 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 fielduj dndhjb3+n;w4eq 5o7q jekk+ tfu9m: :xw79 in Region II. What is a necessary direction of the magnetic field in regions I and II?
Ignore gravitational forces.

  12.36: A positive charge moves with cons: kyzo(/ol ;zlsj6- p + d:a9jbzrom)ltant velocity through a region of space co9ybzzl;d:+o lm z- j(aool/)sp:r6kj ntaining 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 cw9 qnp6;3c+ peum)jh donstant non-zero velocity directly 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 gravity, 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 fi+j 9e6 ;cwpp hd)munq3eld in the region originates from an unseen external source.