09.18: A wire has a conventional current Ijg-k bmkz3 r/0 directed to the right. At the instant shown in the figure, an electron has a velocity directed to the left. The magnetic force on the electron at this instant izbg-km rk j30/s

  14.24: For the bar magnet shown in the figure, wh*c66o3xyh tugich choice best describes the direction of the magnetic field at the point P located directly above the center of theoug*t3xyc 6 6h magnet?

  11.34: A wire lies in the plane of the page with conventional current-;de2o 9; zu0nud enkv4cu:9n.x gz na I shown. At the instant shown, what is the direction of the magnetic force on the electron thdzx9o;e49 kuzv2 -eucgn.a: 0nnnd u ;at is moving directly to the right toward the wire?

  13.30: Electrons flow to the left.i1hm +r ,muv*)lzw ut in a wire as shown. For the proton moving toward the top of the page at the instant shown, wht,wu1lmih muvz r).* +at is the direction of the magnetic force on the proton?

  94.30: The conventional current I in a long straight wire flows in the upww o)tw; kyh,,zard direction as shown in the figure. (Electron flow is downward.) At the instant a proton of charge +e is a distance R fr;ho t,zy)w, kwom the wire and heading directly toward it, the force on the proton is:

  95.16: A charged particle with constant speed enters a uniform ( ldk:1p nddf:magnetic field whose direction is perpendicular to the particle’s velocity. The n1pd d f:k:dl(particle will:

  98.10: A charged particle witp5o/-bza. zrjh constant velocity enters a uniform magnetic field w r5az .pb-/ozjhose direction is parallel to the particle’s velocity. The particle will

  03.34: A positively charged partaoca48eli -w,icle 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 magnitud, e 4i8al-aocwe 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-zer u:mgiho,512gapvw l,j 1q rp;o velocity in a region of space that has a 1q;hl5v:r apmpj ug i1og,,2w 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? Ignore gravity

  04.14: A positive electric charge of neg:m z1wj8 zdd8zy;5yl87zkihdligible weight is released from rest between the poles of a horseshoe magnet as shown. Whatykhwd:1zzizz 8yljdm8 d 785; would be the direction of the acceleration of the charge caused by the magnetic field?

  10.26: An electron moving ihj:x1jm()do (kl(rmf) 7xys 7 pmn5pan the plane 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, which best describes the ( fm17a)khx7mpr5sn(:ljm)jpdx ( oy direction of the resulting magnetic force on the electron?

  11.29: An electron moves wit5auwsc1 jd8 6pmgsy. :h 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 travelscwv e)+efzku 0kk3 5a9 )5upaj at a speed 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 halfwayu +)ckee9zvjpf kku 5aw5a30 ) 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 enters a magnetic field B a ,j*dcs*w 9.o3wrqbv9wt+tc lnd i9o*wl*,rvw ct ctsj+9 wd qb3.s 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?

  16.44: A proton moves in a circular orbit in a uniform magnetic field B. A .fzgt9gav5z9o, 3 drghelium 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 thrg vg .g993ofza5dzt,e helium to the speed of the proton?

  10.43: Two ions travel perpendicular to the same uniform magnetic field. Th41 17nkrpn/ze exbu-we ions carry the same charge and have the same path radius in the magnetic field. Which o1w-7bpuk/ 1 4ex rznenf the following quantities must be the same for the two ions?

  02.15: A positively charged particle moves to the right. It enters a regi-ga 7)t o,kg9;it 0yhyytfyh oo29y a,on of space in which there is an electric field directed up the plane of the paper (see figur9 9oyafk-y2;yho0, yt,ay t7go i)hgt e). 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 mam2l; m2gse6z)w qzy 4;s0zqux4 o /gznss 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 cha a1 l4qgr27i d.-r1nekukk8 tzrged beta particles is commonly determined by18tg u . d-kzlk2rin17a keqr4

  09.27: A proton moves st 1gp0k mfm wtz/jil178,osolfr 2c0t3raight up the plane of this page into a region that has a magnetic field directed to the right. If thewf/ 1 07z,80mkp sl2cmtrjif1o gtlo3 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(/hf9gt07ljduj -mil 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 i0hflgdmj i(j79 /lt-unto 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 wew7 -l(t z6t.jqe *f0y t9se,ewgzsi0ith constant velocity through a region of space containing bot*s 0s7te9ze(tiwq6y 0f .wjeelg t,-zh 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 kc*ujj g2 3fkfbb9+ x6 kcd-opu);:ohvelocity 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 electricpf h;k:gf 9k-+kj)j63ob xu*doc 2buc field that exist at the location of the electron? Any electric field in the region originates from an unseen external source.