09.18: A wire has a conventional current I directed to the right. At the ins7kc oasliif2- z(g(d rlkv917tant shownlg- kvkci 72o9l7i1frdas (z( in the figure, an 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 tbkhoa o7 wtv:9a tp.)2 s-)npghe figure, which choice best describes the direction of the magnetic field at the point P located directly above the center of the magne-) k2t7o)pg:t.w opnb9ahvsat?

  11.34: A wire lies in the plane of the page with conventional current I shown. ri8hg3* uh 9ij7( (f 7:d3zx v)wsgiz2bqihrfAt the instant shown, what is the direction of the magnetic force on the electron that is moving d3hhiv)b f:2z rhijirdf i8u( qg*73g 7x9s(zwirectly to the right toward the wire?

  13.30: Electrons flow to the left in ark l)hwtjk73h8t+sc . wire as shown. For the proton moving toward the top of the page at the instant shown, what is the direction of the magnet7)8 .hk+3ttjlcrwk hsic force on the proton?

  94.30: The conventional current I in a long straight wire flows in the upwarbg++ 2lgfas/mm t-wdw v+u y04d direction as shown in the figure. (Electron flow is downward.) At the instant a proton of charge +/t0mum4 d+ -yg2w +glsf+baw ve is a distance R from the wire and heading directly toward it, the force on the proton is:

  95.16: A charged particle ez66kp 9 4z8p di/4tcfxnmno0with constant speed enters a uniform magnetic field whose direction is perpendicular to tc4 d6 z/ e f0nxp6mi4o8ptz9knhe particle’s velocity. The particle will:

  98.10: A charged particle witfkt-:7kak (fr h constant velocity enters a uniform magnetic field 7f-(kf: rktakwhose 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. Ae a1f5flmk k)0 non- zero electric field E is directed into the plane of the table. A non-zero maa0f1le5k )mfk gnetic field B 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 with constant non-zeit n ztqy+h8;5xmq/1uro velocity in a region of space that has a uniform magnetic field directed into the p htn/qtmizq18 ux+y5; lane 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 from rest26(wvek3zxpod(8 5mvxk.pgq between the poles of a horseshoe magnet as shown. What would be the direction of the acceleration of the charge caused by tdv.(x(ev3kw5oqp8 2 z xgmk6p he magnetic field?

  10.26: An electron moving in the plane of the page at an angle of 300 to q kitso42qkbw:) ipt wd8pi8yt y-so4.7 8 (ubthe horizontal enters a region with a constant magnetic field directed horizontally in the plane of thequ wy i wk 7d42q).iobt4tp y(psstbk:8oi8 8- 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 with speed 4x x56 1yr2w5*i 8wcvzmevwu k$1.00× 10^3\: m/s$ 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 massisfb3- xl;x p sp3*g1t0bj3 js m travels at a speed v in a plane perpendicular to a magnetic field of magnitude B. The electron followsstb * 31xp3j s-igfp;jsl03bx 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 unq 1-2hygkwc3lv;m- m, and speed v enters a magnetic field B and is deflected into a path with a radius of curvature R. If a se;- hqglynw21 -k uc3vmcond 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 he9t k6rue1 s5btun5jb *lium 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 r snbtke r5b1uutj596*atio of the speed of the helium to the speed of the proton?

  10.43: Two ions travel perpendicular to the same unifsktu-k rvb xmqu3i9(n,)ft(j,w1-re ko x:d7orm magnetic field. The ions carry the same charge and have the same path radius in the magnetic field. Which of the folloe( x-m9tq -u3,:k )vi7js1 dfx,or w(knkrbu twing quantities must be the same for the two ions?

  02.15: A positively dcm+e*a5 cwu9fp 1 kvx6wvss4v)v u) 1charged particle 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 cod f +)wxu u4pvs1m5w6ac*9v skv)ec1vnstant velocity?

  96.40: A proton of mass M and kiikgsj8wa-k9- xt9ju/ netic 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 particlop5ro+fdlresm 0 5 lej3/vx0 1es is commonly determined bym3 r0fr5o/ox 0l1e+pejl5vsd

  09.27: A proton moves straight up the plane of this page i0xe 8z6m7pkkq nto a region that has a magnetic field directed to the right. If the particle is undeflected as it passes through thiskx0 zeq6p 78km 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 t g) 6(gni6b obw;ewk;hrao.-l hrough two regions of space along the dotted-line trajectory shown in the figure. There is a uniform6b );ro6-g(ow ;ignk welhba. 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 7xbh j:i;r f5avelocity through a region of space contai5if;h:j arb x7ning 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-zr7hnz)pj-e- +xfd9 vtero velocity 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 electric field in the region orxrz9vd+ne ) -j7ph-tfiginates from an unseen external source.