09.18: A wire has a conventional curren.go2t+e7jko c t I directed to the right. At the instant shown in the figure, an jo.e+t2ogkc7 electron 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, which choice best describes thetwa.k .kii,. k+bojq* direction of the magnetic fiik.i k., *o.kwaqtbj+eld at the point P located directly above the center of the magnet?

  11.34: A wire lies in thehs/a( lh opr,*1jfu-p plane of the page 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 w/jrp 1fl(h*sa -,phuoire?

  13.30: Electrons flow to the left in a wire as shown. For the proton moving 5-g qy.s ny a)iytsw o1ok p(*)eris58toward ti5 y sywqpask)n tr5.)i(-ye 8* goo1she 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 wire flows in the upward did m r1r/+ilhaf,)btd-rection as shown in the figure. (Electron flow is downward.) At the instant a proton 1drtlr d b,-hamf/i+)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 con;-n a2e9 laax0 hpm;sads) b2nstant speed enters a uniform magnetic field whose direction is perpendicular to the particle’s velocity. The pnm ba- ep22sh;n ;9dlaa )s0xaarticle will:

  98.10: A charged particle wi;zp ,-b zf;hb d jd228sxb )s6bzux0ajth constant velocity enters a uniform magnetic field whose direction is paj 8pd uszbb);j0-z xab zbfd2;x6, 2shrallel to the particle’s velocity. The particle will

  03.34: A positively charged particle of mass M is at rest on 2 mw22dh yh xm,d5fwl9a 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 dm 2wmfl x9dy2h5,hw 2the 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-zer)c kq .(gmdmh9o 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 directik mh) g.mq(9dcon of the electric field in this region of space? Ignore gravity

  04.14: A positive electric charge of negligible weight is released frdmu:;5sc0qc j gwbx pk 1n3:0bom rest between the poles of a horseshoe magnet as shown. What would be the direction of the acceleration of the charge caused by the magnetic fsk3 ; 5w:0bq1mp0n bcj:cx ugdield?

  10.26: An electron moving in the plane of the page at an angle of 300 to 8esqh6x6 m*7lu i, pl+ynjq9hthe horizontal enters a region with a constant magnetic field directed horizontally is6+,hm6nyqi p*q lx97ejl8u h n 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 wi(a :h)jl gjri4th 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 :w nhq um8/xamgo4;b: and mass m travels 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 halfway around the circle. What is the amount of work done by the magnetic force on m:a umnog: 8hw/q4 ;bxthe electron in this time?

  97.28: An ion with charge q, mass m, and speed v ente)en a6wajo4nb z33/ln5sjf7g rs a magnetic field B and is deflected into a path with a radius of curvature R. If a )znsgnj346wj oe ba / n7al53fsecond 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 l bf0wojj */h2magnetic field B. A helium nucleus moves in a circular orbit in the same magnetic field. If each particle experiences the same magnitude magnetic force during its motion, what isb/jf*02 wlohj the ratio of the speed of the helium to the speed of the proton?

  10.43: Two ions travel perpendicular to the same uniform magnetivk fnv;x-6 (a7e 0pakeh4 3xenc field. The ions carry the same charge and have the same path radius in the magnetic field. Whvee kfh4e3(-axak;0 v6p 7nxnich of the following quantities must be the same for the two ions?

  02.15: A positively charged particle moves to the right. I08cgpme 2f* kvnr8 e.mt enters a region of space in which there is an electric field directed up the plane of the paper (srm.2 ek8pc e8m*nv g0fee figure). 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 m;s ,eiq ,fis9lass 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 particles is commonly n-tu;l( aktc*determined ba t ct;k*nlu(-y

  09.27: A proton moves straight up the plane of this page m8p84fh 8qz:p xuqmq0 dde4s)into a region that has a magnetic field directed to the righ mqud40s8d4x)qhqzme :88 fppt. 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 pa4vjsuij 76h1i ybd u98ge through 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 electrih1v7bj id6 y4 9ius8juc 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 a region of space tk, c;:7xazv,z 0ot pncontaining both :tp7 kznoczt;0 x,av, 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 vgxmagp:j(w8t t aq) :0elocity 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 electric field that exist at the location of the electron? Any pta: t80)gx wma(jq:g electric field in the region originates from an unseen external source.