09.18: A wire has a conventional current I directed to tb .*buo2 rk1jl5c;wjzhe right. At the instant shown in the figure, an elej;c.bzrl512 *w kbujoctron has a velocity directed to the left. The magnetic force on the electron at this instant is

  14.24: For the bar magnet shown in the figure, whic+ g:gni4:)xt)h3csvmm old s7 h choice best describes the di v:gxsmdt: gc+nl)i4m)o 7s3hrection 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 page with conventional c,42gx)0arjrn q tzke4urrent I shown. At the instant shown, what is the direction of the magnetic force on the electron that is moving directly to thean24tq zjreg4)0rx, k right toward the wire?

  13.30: Electrons flow to the lefnsj+fa3 tdyh3xv.6spt mx g(75 :xlk* t in a wire as shown. For the proton moving toward t n(yl3hm 3t7xxadfg*:xj k tp5s 6+.svhe top of 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/r1sxeupuc scm0q- t9pkyn 9r 68n).j 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 an 8jnq.m1 y9xsuu r kn/p )9s0erc6p-ctd heading directly toward it, the force on the proton is:

  95.16: A charged particle with constant speed enterzpso )k,*q cjc)wb9r8s a uniform magnetic field whose direction is perpendicular to qwb 8p)s,*kccr9j z )othe particle’s velocity. The particle will:

  98.10: A charged particle with constant velocity ent1qv yqv5xi62v (ve u8gers a uniform magnetic field w1ex5vq2vgvuv y(86qi hose direction is parallel to the particle’s velocity. The particle will

  03.34: A positively charged particle of mass M is at rest on a table. A non- zere xq3;4mn 6whro 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 tabl4n qxhr63emw; e. 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-zero velocity in a reiqqoq qn0,h a+;ol(955lg tgu gion of space that has a uniform magnetic fiu9oq aq0,5l 5qg(hn i;gq +loteld 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 negligible weight je: 28msxci*wis released from rest between the poles of a horseshoe magnet as shown. Wwe2mc*xis8 :j hat would be the direction of the acceleration of the charge caused by the magnetic field?

  10.26: An electron mih vr4.zh 6at+oving in 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 thez. h+t4v r6aih electron enters the magnetic field, which best describes the direction of the resulting magnetic force on the electron?

  11.29: An electron moves with sp7d : 6osggm2xs-lnq a-eed $1.00× 10^3\: m/s$ 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 78eyq3zi8 qzka plane perpendicular tiy3ze q7 8z8kqo 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 magnetic force on the electron in this time?

  97.28: An ion with charge q, mass m,m ( 3-c);hy npiby.zsq 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 ar3byin) y(; p.zc-qmhse unchanged, what will be the radius of the second ion’s path?

  16.44: A proton moves in a circ bivop) lc5x-y;sau.ok.n me(f 77ju:ular orbit in a uniform magnetic field B. A helium nucleus moves in a circular ob 7a.( kf n.jux;yeo5uo7-iv)pmlc:s rbit 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 the same uniform magnetic field. Thwkpeir e8h 55tqi 3y;+e ions carry the same charge and have the same path radius in the magnetic field. Which of the following quanthi; re553yekwtq p+8iities must be the same for the two ions?

  02.15: A positively charged particle movesf3q,pa(sie4l19 k lwt 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 region so that the particle mafa4,es 1i(kp3w qlt9lintains a constant velocity?

  96.40: A proton of mass M and kinetikcptr5)o;;cj6a. 1wrk hns :wc 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 electraimdb 6m41- r zeg-o8tically charged beta particles is commonly determined b-4m1gz6rbio - mdat8ey

  09.27: A proton moves straight up the plane okjz -ddpw+)c//wm m2 zf this page into a region that has a magnetic field directed to the right. If the particle is undeflected as it2kmpw-/j w/zdmz) d +c 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 two r ur. c1ww)c/pe4ts wv(egions of space along the dotted-line traject )evw(w c./tc 4wpsur1ory 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 veloc6o0v *ors sa; b3tej(eity through a region of space cono; a3rovb 6( je0ses*ttaining 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 velocity directly betwe+po;0 foftfs 8tz2.tfen 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 epotf +fosz0t. f2;ft8 xist at the location of the electron? Any electric field in the region originates from an unseen external source.