09.18: A wire has a conventional current I directed to the right. At the : k/8txj(qooec8 a5soinstant shown in the figure, an electron has a veloctko:q(a/5 oe8 x 8sojcity directed to the left. The magnetic force on the electron at this instant is

  14.24: For the bar magnet shown in the figure, which choice best describes thex-kh30ne hy siwk i-kf+r10t jk6d1n3 direction of the magndiehrn3yk 3- 6k ihf+-0k1jktnw 10s xetic field at the point P located directly above the center of the magnet?

  11.34: A wire lies in th6f2 : .6m dgfr7tdpb xnjuq)3te plane of the page with conventional current I shown. At the instant shown, what is the direction of the magnetic force on the electron that is moving directly to the right toward the w7jbtx).q 2 3p:ndf6rtg um6d fire?

  13.30: Electrons flow to the left in a wire as shown. For thr4(s m+ss9yor e proton moving toward the top ofs s+oy( rmrs49 the page at the instant shown, what is the direction of the magnetic force on the proton?

  94.30: The conventional current I in a long straight:ti,- t*+iwfha(jj*lcr; yul wire flows in the upward direction as shown in the figure. (Electron flow is downward.) At the instant a proton of charge +e is a distance R from the wire and heading directly toward it, the force on the proton is:,wiu tlhlji* :-; cta+(yfrj*

  95.16: A charged particle with constant speed enters a unifo ce rhg*/c )37ebt t6znf+lvc9rm magnetic field whose direction is perpendicular to the particle’s ve7e3gcc69vet/hz + trcn*l b f)locity. The particle will:

  98.10: A charged particle with const8uo -st 2;cnvfant velocity enters a uniform magnetic field whvouf28;c -st nose direction is parallel to the particle’s velocity. The particle will

  03.34: A positively chargedw.0 e5qpaz*v6 zvjn .t 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 about the magnitude of the electric force z0q*t.nwav6j5. z vp eon the particle $F_E$ compared to the magneti force on the particle $F_B$?

  16.24: A proton moves with conj47xzhk fzw), gnv x+ii18)vm stant 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+x7i4v jkfw,ximn1 gzhz))8v region of space? Ignore gravity

  04.14: A positive electricai-u 2ha1-zok8j nfxbh4y2m6 charge of negligible weight is released from rest between the poles 22xfim 4ok j6azyu 18banh h--of a horseshoe magnet as shown. What would be the direction 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 toua *fzm q5t;dt/ -hj7q the horizontal enters a region with a constant magnetic field directed horizontally in the planet hj;td*uqmq57z /a- f 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 the electron?

  11.29: An electron moves with speed sid6jw*; m2yd*kdy1 ,ulh.r y $1.00× 10^3\: m/s$ 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 s 4eihquffdwh70 iq(:4peed 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 is the amount of work done by the d0 4hih(wqfqu i7e4f:magnetic force on the electron in this time?

  97.28: An ion with charge q, mass m, and speed v ent,lsz cw 0bm7y4(wgmh71dg5m y ers a magnetic field B and is deflected into a path with a radius of curvab7l5 gm hy1cy, 7z mgw0dwm(4sture 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 path?

  16.44: A proton moves in a circular orbit in a unifp 2d17sek4 j7lubves. orm magnetic field B. A helium vs7se74ej p2k1u lbd. 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 ratio of the speed of the helium to the speed of the proton?

  10.43: Two ions travel perpendicular to 9(cc nd)rc .d0aah3dithe same uniform magnetic field. The ions carry the same charge and have the cdr) nc9(i.ha add0 c3same 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 o k6zxc33df gvm9v4d k f.q,i:yf space in which there is an electric field directy cf9:dd6kvz 3gx3,ik f4q .mved 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 kinet9ur *um oh-(aq)163 n -ziurvrf6jltqic 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 electrically charged beta particles is commonly determined 0mllw)44*hmgkqgy w) byg 4m)4)ll* k qww0hygm

  09.27: A proton moves straight up the plane of this page into a regionz/,bso rkk6xt scm9(3 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 (oxc/mtbsskz39 r6 ,kbe a component of electric field? Ignore gravity.

  08.36: An electron moves in the plane of the page throug +vmsskhk1 .2p :u/hhs2 q:a2yawp-k dh two regions of space along the dotted-line trajectory shown in the figure. There is a uniform electric field in R2:: 2shwqh1dhavsmp s2/auy.pk +k - kegion 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 regions I and II?
Ignore gravitational forces.

  12.36: A positive charge moves withcb 5lby ro /g52,1qdwz constant velocity through a region of space 2,5 b/5d cglboqwr zy1containing 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 ve ua1 oteiqx)*j2k. /ablocity 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 region originates from an unseen external source. )*a 1 /2ikujqbo.exta