09.18: A wire has a conventional curr8c:2 l.y;imi w7tagct ent I directed to the right. At the instant shown in the figure, an electron has a velocity directed to the left. The magnm :8tc;iay g lwti.27cetic force on the electron at this instant is

  14.24: For the bar magnet shown in the figurn4;8a 5;w bjog)hvj5n2kqv; sgc /wnbe, which choice best describes the direction of the magnetic field at the point5 ; ;w8cgnjjg4n bv;o2hn5qaws/bkv) P located directly above the center of the magnet?

  11.34: A wire lies in the plane of the page with conventional current I shown.jm9h.2q t5g1 g0k aznabxt/1 u At the instant shown, what is the direction of the magn xk thmg5z9bat121j g a/0.uqnetic force on the electron that is moving directly to the right toward the wire?

  13.30: Electrons flow to thexieofk33 g55cvd -w+d left in a wire as shown. For the proton moving toward the top of the page at the instant shown, what is the dire5fkd 3w3 i5 edoxcvg-+ction of the magnetic force on the proton?

  94.30: The conventional current I in a long straightm;+u aemt:hxyt +)cx2)rp ng7 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 prcxt)gnt 72; mrhayu)em+xp :+oton is:

  95.16: A charged particle with constant speed enters a unyqg0- +o 1qc ,dge9jfxkyf4 l6e b4sl(iform magnetic field who44g1 -fcq+(6 o0 9e xgy,bl elfkqdjsyse direction is perpendicular to the particle’s velocity. The particle will:

  98.10: A charged particle with nc m /+-*w) 1s-ace gasfbg0vbgp5h/tconstant velocity enters a uniform magnetic field whose direction is paralla5h*msf)tcbb/av- g/p 0 -gn+1w ecsgel to the particle’s velocity. The particle will

  03.34: A positively chaytd)p6( 4oh*3krm)d( c san karged 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 on the particlny (6 akd ct43a*do ms)kr)h(pe $F_E$ compared to the magneti force on the particle $F_B$?

  16.24: A proton moves with constant non-zero velocity in a region of spa8njtgx( tt9r g)j,4clqr 6vf2ce that has a uniform magnetic field directed into the plane of the page. The proton moves directly up the plane of the page.v9tjjrtfx4ncrt6(q) g, l2g8 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 rix0 i):js 5-wd oh gh du9k7q85wlm wll3:as1lest bet3ulq kl 8s:l5g)l-h jdas i5w7d howx0 m1:9wiween the poles 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 z28u1 j ve( 9um4ztulv7jf )xtan 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 fieldj829 zut71lvmuztxj)u (fev4, which best describes the direction of the resulting magnetic force on the electron?

  11.29: An electron my202p 5sf iu)il sdsg)oves 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 pl -mgr hb5bpfqkiiz,a(/ m-f8j: r2a9tane perpendicular to a magnetic field of magnitude B. The electron follows a circular path of radius R. In a time t, the electron trrk--bjrt f8 p:q,mm2 ai(g9i5/zbfa havels 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 charhr7 kzuo2r010ixm*/:*vxq9 javzpa z ge q, mass m, and speed v enters a magnetic 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 path?qx: zxk*9m1jio7azhpa0 v0 uzv* r/2r

  16.44: A proton moves in a circular orbit in a uniform magnetic f1x/ 71yk vgf w7ak7ovwmo- c3field B. A helium nucleus moves in a circular orbit in the same magnetic field. If each particle experiences the same magnitude magny7m okgk1x-wwfv7 f3a 7v/oc1etic 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 . hkw:ng;tjm gx0io 45magnetic field. The ions carry the same charge axmgkhn;jt5o i4: wg 0.nd 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 bg8 e2cpym m;r eg9gxa3 v9 pb3k*q7nv60myd,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 magnetmgcm, g 39 e0;vbaqr gm3ey69 x*nkdp7yvb2 8pic field have to point in this region so that the particle maintains a constant velocity?

  96.40: A proton of mass iu 6mw4c.et6.qf m yj,M and 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 electrically charged beta particl4-atckytg,9n1 b + cples is commonly determined btn-l kp1c4+gatcy9b, y

  09.27: A proton moves straight up the plane of thi w:v b8dh1/f0 adtu+skg 6je*ps page into a region that has a magnetic fpw e/uvk 1*0 s d6h8t+g:adfbjield 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.

  08.36: An electron moves in the plane of the pxwy1tz0 cp*yq6x11i* jv rr:hage through two regions of space along the dotted-line trajectory shown in the figure. There is a uniform electr yhvx*r 1p1zr *xw6:0qtyjic 1ic 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 regions I and II?
Ignore gravitational forces.

  12.36: A positive charge moves with constatf k r1i50:f)p8af6k peg8* pu4wzwwv nt velocity through a region of space containing botw ruptz)50ep8w p: a w*g6f1ikk8f4 fvh 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 velocizic c8pzc3 f/k 9)v3flr t7dy-ty 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 magne pvcd79z-/z i3l kctfyr)f8c3 tic 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.