09.18: A wire has a conventional current I directed to the right. At the instancc uw/b5x9b1.a4oox h t shown in the figure, an electron has a velocity directed to the left. The magnetic force on the electron at this instant xo u1bc459/wboa.xhcis

  14.24: For the bar magnet shown in the se.l( x0+xfz ay(5nsgti1bm3 figure, which choice best describes the direction of the magnetic field at the point P located directly above the center of the magnl3 0n ygxixfm.seaz(( 1s5+tbet?

  11.34: A wire lies in the plane of the page wpypt +l3s z08lith conventional current I shown. At the 38p+spl tl0yz instant shown, what is the direction 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 a. o9.p.bsjz2kns;gpc;.hoz: h z*hh ds shown. For the proton moving toward the top of the page at the instant shown, what is the direction .c h.hpj9sdh pg*obk.h os;; nz2.z z:of the magnetic force on the proton?

  94.30: The conventional current I i qe.+ 8f,,hinnvdto(on a long straight wire flows in the upward direction as shown in the figure. (Electron flow is downward.) At the instant a proton (d8 ,no h,e+t. nvifqoof charge +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 consth7 miol )v6b)pkd u57vs6mv, aant speed enters a uniform magnetic field whose direction is perpendicular to the particle’s velocity. The particlklvsv,) 7 pmahi656b m)dou7ve will:

  98.10: A charged particle with constant m *bfu/xqoj 0bqic(- e,2p0wo zgi2e 5velocity enters a uniform magnetic field whose directioq,2bi q 2oxw*ip bj(/c05 0meuge-o zfn is parallel to the particle’s velocity. The particle will

  03.34: A positively charged particle of masssx39j i:vh579cb egrm 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 v9b 9gm5chx3: isejr7directed 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 witmn71g-c n zd/lh constant 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. What is the direction of the electric field in this region of space? Ignonn /-1c7 zgldmre gravity

  04.14: A positive electr48z2zrdqppsv(1: *- 4pe8hpzbc zh tdic charge of negligible weight is released from rest between the poles of a horseshoe magnet as shown. What would be the direction of the acceleration of the charge caused by the magnetic fiep ht24spp- z(41 *hdd p8qzeb rv8zc:zld?

  10.26: An electron moving in the plane 7edbras ej 9;k8nanlb, s )x2-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, whichesbbs ax,n7- dlrej )2 a8;9kn best describes the direction of the resulting magnetic force on the electron?

  11.29: An electron move5c kd 9xxb u/p8u/e(dhs 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 speed v in a planez sdjf)p1yk *4lr/i/s perpendicular to a magnetic field of magnitude B. The elecy)/kl si1*/r 4jdsfp ztron 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 en5ip n3t.aqdsc sc( a2/ters a magnetic field B and is deflected into a path with a radius of curvature R. Is 32c dna a.5ct/psi(qf 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 in a circular orbit in a uniformbaje u404uof2 magnetic field B. A helium nucleus moves in a circular orbit in the same magnetic field. If each particle experiences the sau04ao2b 4fuje me 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. Th2u)tig vrv+6o1wzp )oe ions carry the same charge and havv o6i) vu+r1tg)ow2 zpe 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 tu + ,7 k6s;m vbqtr+ysif2a/pof 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 so that the partif+/tkra si y,qu+;76v btpsm 2cle maintains a constant velocity?

  96.40: A proton of mass M and kinetic ene *hey 1ful/b.vrgy $E_k$ 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 7n lsh q9hqg-6particles is commonly determined b7ghqh nq96 s-ly

  09.27: A proton moves,k i; uzs6yoe, straight up the plane 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 thu6 ;,e iky,szoere be a component of electric field? Ignore gravity.

  08.36: An electron moves in d(i .k 2zqae*mthe 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 direction of the magnetic field in regioka2m iz*d(e. qns I and II?
Ignore gravitational forces.

  12.36: A positive charge moves withox9 55um/vqw9iq6nc k constant velocity through a region of space containing both aci/uv w9kq96om5nxq5 n
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 co cho4l3q dmc t*gw8z9iwl3*xchcm x0y31/n ;j nstant 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 field in the regiohm wch l9; jocgmty3* *d n/8c13ix 3x4zq0wlcn originates from an unseen external source.