09.18: A wire has a conventional current I directed to the right. At the insta n y+53d)iikyant shown in the figure, an electron has a velocity directed to the left. The magnetic forca yyd) i+i5nk3e on the electron at this instant is

  14.24: For the bar magn1lh np)qxrw jgiu.5ml3 ).y:het shown in the figure, which choice best describes the direction of the magnetic field at the point P located directly above the centeg y)ul rmx wij1 3h:.plh.nq)5r of the magnet?

  11.34: A wire lies in the plane of the page with cos)+i m;orw ol4lv4h+c v.ej;bwp* xi0nventional current I shown. At the instant shown, what is the direction of the magnetic force on the electron that is moving directly to thrbwv ;ow;.l ic oj)i*4+ 0e xshlmv4+pe right toward the wire?

  13.30: Electrons flow to the left in a wih, c m8l7cib(ouup6two ,/ f) :hns(wure as shown. For the proton moving toward the top of the page :f8,tu67buw ,n wsoo)cip/ l cm(hh(uat the instant shown, what is the direction of the magnetic force on the proton?

  94.30: The conventional current I in a long straight wire flows in the upx uog0ldcj+ u/ /d(+hzward direction as shown in the figure. (Eleccld+jhuu/+/0( x dg oztron 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:

  95.16: A charged particle with constant speed enters a uniform magnetic 11+- f fpwcln;lfa(i brn8zw3field whose direction is perpendicular to the particle’s vebf i; - f+ cw(1rn81faln3zlpwlocity. The particle will:

  98.10: A charged particle wi64vg5i mu,s- pw/*iyt ln5gw lth constant velocity enters a uniform magnetic field whose direction is parallel to the particle’s veloc snlv l4gi p yw-ium6*5twg/5,ity. The particle will

  03.34: A positively charged particle of mass M isf tn*:25zkf bneu(s a+ at rest on a table. A non- zero electric field E is di(bfz+* nsta5e ukn:f2rected 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 on the particle $F_E$ compared to the magneti force on the particle $F_B$?

  16.24: A proton moves with constant non 2jk g9rzm,xv0-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 di v zmrk2x9g,j0rection of the electric field in this region of space? Ignore gravity

  04.14: A positive electric charge of nez.dn.r13y )5fsd1 8cxdruz +gazt + zbgligible weight is released from rest between the poles of a honc zs35fa u+1zr).d zz1y. b xg+8ddrtrseshoe 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,s8 c+ kx*sbnhatn /e- an angle of 300 to the horizontal enters a region with a constant magn +t ,hbsexc*8an-skn/etic 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 the electron?

  11.29: An electron moves with speede(l:)qd q0ql 2pvxk a8 $1.00× 10^3\: m/s$ 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 trave8 yzunmc, u jbv44r1-xls at a speed v in a plane perpendicular to a magnetic field of magnitude B. The electbc, -m8n zv 4jury4x1uron 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, o90 -y9q eiqislvr a72and speed v enters a magnetic field B and is deflected into a path with a radius of c0 s9qrai9 eqo-y7v 2liurvature 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 uniform magnetic field B. A helimgyy/ 3/zxo7u um nucleus mo/uzm gxy 73oy/ves 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 d3bw7jjgfu a3 aec7v 5u)7)fvto the same uniform magnetic field. The ions carry the same charge and have the same path rade) 7jfwjagv75u7 b 3ucvd a)f3ius 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 righm(fahh wxk equcf( (*1ov0ka9)6c , rft. It enters a region of space in which there is an electric field directed up the plane of the paper (see figure). In which direcvhckce ra(o a, (q) k6(f*xmw9h 0fu1ftion 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 e3k 4i-q1 c2bri6:ng f. kn(:xnuqfpzfnergy $E_k$ 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 iy(e/s ebmf.lh (*s97quu : tpfs commonly determined b/phey7.mt u:felf*9 (s (b usqy

  09.27: A proton moves straight up the plane of this page into ks8cxg7po w:9 a region that has a magnetic field directed to the right. If the particle is un:g7k 8spo9wcx deflected 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 the plane of the page through 2cxcl,j 3wm-n 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 fiel,l3ncjm2- xc wd 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 cou-f 3xibmb/4m7rn2: 9s flppn on8d:enstant velocity through a region of space containing 8n9/-lmxm p3rd :e4 nnpfu fbso7i:b2both 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 directlyi;b:kjl w rts 9u;a.)q 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 l;rakwj9.b i:q;)tu sfield in the region originates from an unseen external source.