09.18: A wire has a conventional current I directa7( ods7d+x 5ot6qjeyvy/f171xe i x bnset/.ed to the right. At the instant shown in the figure, an electron has a velocity directed to the left. The magnetic force on the electronx/ td/ex 7xioya1+jto7ese s.6v17dqf by(5n at this instant is

  14.24: For the bar magnet shown in the figure, wphb1591wbd;cfu jq1y,zp-rszo 9 p2 t,gk (fxhich choice best describes the direction of the magnetic field at the point P located directly above the centerk1t1g5 - swjpz,rf,ppzoud 99 bq;hybfc2x1 ( of the magnet?

  11.34: A wire lies in the plane of the page with conventional current I shoz:c4 tojr aw7t ;)xt)q:wrd)pc84te n wn. At the instant shown, what is the direction of the magnetic force on the electron 8 7t)cnt44cte xpoa:wtjrz); )qrw: dthat is moving directly to the right toward the wire?

  13.30: Electrons flow to the left in a wifyq/) ;pn /shtre as shown. For the proton moving toward the top of the page at the instant shown, what is the direction of the magnetic force on thp;/)yqf hn/tse proton?

  94.30: The conventional current I in a long straight wire fl2u x8 9ei dhm2 q/9n+:piyplslows 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 qs9dhnim e p8u: x/2lp i9+yl2toward it, the force on the proton is:

  95.16: A charged particle with constant spez 3n*gpzp,(d9k iejfb,o, j .rf8s6nk ed enters a uniform magnetic field whose direction is perpendicular to the particle’s velocity. The particle *6k,z,z,d8 g (ifb9kpj s ne3jof.nrp will:

  98.10: A charged particle with constant velocity enters a9n:t6b+v2f kh6mib hb uniform magnetic field whose direction is parallel to n+ h9fvbtb62khm: i6bthe particle’s velocity. The particle will

  03.34: A positively charged p hlqb3twhm -hhox6s8w7440n dm3 jzcav -n;v/ article 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 t 4j-7x c8n lv3 wsb h;hadmwhtmzq3n/6-o4vh0able. 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 region of spe-nc3gqw *; rpace that hg e*3c;rn qw-pas 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 of the electric field in this region of space? Ignore gravity

  04.14: A positive electric charge of negligible weight is released fro/kdj,m*ag *0i n1i+3nbvha wom rest between the poles of a horseshoe magnet as/hinb+1 kmv*3 j*gin, dao0 wa 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 o2wj;, ml s7odge rs.0 6hqj2yrk -dsm;f 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 direction of the resulting magnetic force on the egkm e;my0w.l 2 d2rd 6 s7o-;ssj,rhjqlectron?

  11.29: An electron m kou fme29e9z0oves 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 (efvx,ssiyk+( 3p7 prl9 1pib 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.s sf p,e3vp(i1kyb+rp9 7( xli What is the amount of work done by the magnetic force on the electron in this time?

  97.28: An ion with charge q, .mebno6h(57epv2)m itc,6v7ggqth o 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 uncha6 o7tqv2et ohv( b,m.pmg7g 6n c)5ihenged, what will be the radius of the second ion’s path?

  16.44: A proton moves in a circular orbit in a uniform magnetic fieldn31sw,ukv 6s6ud5 ire 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 mo sdn5u163 wirveusk6, tion, 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. Thcj;j 3t5- w6: 4c 0n,yyfwmciimkyfy*e ions carry the same charge and have the same path radius in the magnetic field. Which of the following quantities must be the same ftkc 5 cj;j :4wi*3n0cmyimy-wfy6f ,yor the two ions?

  02.15: A positively charged pasl ,:x)k7yylxfkh5 s3 a2 hwu6rticle moves 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 maintains a constant velocity? 3u5hl swslka2 6 y)f,kxy7 hx:

  96.40: A proton of mass M and kinetic bd8 cz0h)qh.xenergy $E_k$ 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 electric;y y3mwz,q yy2e,fz5ted3/ jsally charged beta particles is commonly determined bymey/ 3d ,y2 tzq;y53,swfeyzj

  09.27: A proton moves straight up mo7 yu5e p,s fe ue:5:tjcea-0the plane of this page into a region that has a magnetic field directed to the right. If the particle is undeflected as it passes through this region, in what direction must there be a component of el:eya, ou 557eue-t e :jsc0fmpectric field? Ignore gravity.

  08.36: An electron moves in the plane of the page through two regions of space d,)s5yyqq,wugbf3 o(ei w .y ;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 electric field) ;d fi35bg qyqy,wu(ow.,yse 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 velocitydm03an .h kpnuhs /;j-:qlof2ytt7i 2 through a region of space containing both an l2n0 si:3o7mfyhjd aqtup.h- k ;n2/t
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 constzj(5q kvqd8 i1ant non-zero velocity directly between two long straight wires. The conventional current in each wire has the same magn8 1jd5qq k(vziitude, 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 originates from an unseen external source.