09.18: A wire has a conventional current I directed to the right. Ataqvw0zk4u) hej3+t-d6scj g( the instant shown in the figure, an electron has a velocity directed to the left. Tj(3zgv ed s0c6w-+a4qjk tuh )he magnetic force on the electron at this instant is

  14.24: For the bar magnet shown in the figure, which8,lvvh 2ep.82t1w9jlzbt pn z choice best describes the direc8lzn wj2zth 9l,b 8.2vpetv1 ption of the magnetic field at the point P located directly above the center of the magnet?

  11.34: A wire lies in the plane of the p+ b9yb7tk imj65hmd2lage 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 wire6tmdi b+jkl72m 9b yh5?

  13.30: Electrons flow to the left in a wire as shown. For the proton moving towack t.)vo5m c(drd the top of the page at the instant shown, what is the direction of the t5)vcdm(c .k omagnetic force on the proton?

  94.30: The conventional current I in a long straight wire flows in rx*m ;h(lvui* 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 thxul;*rhi( v*me wire and heading directly toward it, the force on the proton is:

  95.16: A charged particle with constant s-)e/we bxx 8lipeed enters a uniform magnetic field whose direction is perpendicular to the particle’s velocity. The8el/)xwb xei- particle will:

  98.10: A charged particle with constant velocity enters a uniform magnetic fij is 20899u +zsnyfuq- 1xcgbxg .o3kceld whos j0yx9 sg g8+o1 b3x-s nkfi92qczuuc.e direction is parallel to the particle’s velocity. The particle will

  03.34: A positively charged h es6pkx/wq34 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 3k6whs xeq/p4B 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 wit+zuw 6p:y t5oy v0v,o/axee(y j-ub*wh 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 of6ywe:ypt+yvzv5j/*ue 0( abux- oow, the electric field in this region of space? Ignore gravity

  04.14: A positive electric charge of neglibsfn e 77x35mpgible weight is released from rest between the poles of a horseshoe magnet as n375bps7f emx 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 to thca9zjw (fbzm85(ozw8dxb 5c, e 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 entd8jaobx8 9 c zm((,5bww5 fzzcers the magnetic field, which best describes the direction of the resulting magnetic force on the electron?

  11.29: An electron moves with sps6nu4o ;uz7roeed $1.00× 10^3\: m/s$ 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 chaq3ul g30nbav otfmwtn0x2 ;w6 m7 )fw4rge −e and mass m travels at a speed v in a plane perpendicular to a magnetic field of magnitude B.0tmvg uw2 a0lfq3mw;6nb )37f twon4x 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 magnetic force on the electron in this time?

  97.28: An ion with charge q, mass m, and speed v ef47vj//ew +kbeh th r2p,cq6tnters a magnetic field B and is deflected into a path with a radius of curvature R.hbtrkf6,ech/j4q/ 7+et p vw 2 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 fieldko8al j*5ksdrrck v*s;9 mx .3 B. A helium nucleus moves in a circular orbit in the same magnetic field. If each particle experiences the same magnitude magnetic force duriv; mdsko3k. 8 *ca9r ksrlx*5jng 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 magnet ea nr6xn-ai6nl0ai 6(ic field. The ions carry the same charge and have the san l iia6xr6en6(0-an ame 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 movek n8v/x1syyrb+ 8:dnz 9: qe2idd 0klhs to the right. It 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 regid+ 8ns:lndd8i 0k2q9erb1hkzv: yx y/on so that the particle maintains a constant velocity?

  96.40: A proton of mass M and kinetic energy (c)zqsv*k,ieibab9k yda 84b om*w, 9 $E_k$ 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 chargc3pkug64fdmr.i( tatf31*58jba n jxed beta particles is commonly determined b(54xbpan3 f ma8 c13r ijgt.6*fdtkujy

  09.27: A proton moves straight up the plane of this page inthdju2)p/+ xmi n 2.afeo a region that has a magnetic field directed to the right. If the particle is undeflected as it passes throjn.auif2 pdh2x/me+ )ugh this region, in what direction must there be a component of electric field? Ignore gravity.

  08.36: An electron moves in tu;kgh+ u82- hiuy hd2dhe plane of the page through two regions of space along - d8hkuu2g 2hiy d+hu;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 regions I and II?
Ignore gravitational forces.

  12.36: A positive charge moves with constant velocity through 1,y ng g t.hfw+h6)w.khzw;ora region of space containing bo,.1owg6w.; gyhfwhh krn z t+)th 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 directly between two d7ci-f (7pn lolong 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 p-c7 d(lonif7 originates from an unseen external source.