09.18: A wire has a conventional current I directed d 20 map*cw ;e0zh1 t2zpqt0yfto 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 is z0mq2tez;h2d *cppt0fwy0 a1

  14.24: For the bar magnet shown in the figure, which choice best desc5gt2 o.f) f bf- he/4zxtvu23lghy1uy ribes the direction of the magnetic field at the point P located direct)5 /ft1u4 utb yhhf22go.gzvle-x3 fyly above the center of the magnet?

  11.34: A wire lies in the plane o9 ,z 0vpvuyfvze6 s3kud6/j3 lf the page with conventional current I shown. At the instant shown, what is the directizl, eu9v 0p/3vzsk jv6f6 du3yon of the magnetic force on the electron that is moving directly to the right toward the wire?

  13.30: Electrons flow to the left in a wire as shown. For the prognmeegzv-t 2 ym;3ae 9g*2b *bton moving toward the top of the page at the instant shown, what is the direction of the m tegbzam 3em*9yv *g-g;22ebnagnetic force on the proton?

  94.30: The conventional current I in a long straight wire flows in r7mx)fh* og +ythe upward direction as shown in the figure. (Electron flow is downward.) At the instant a proton of charge +e is a distan*m f)y xog+r7hce R from the wire and heading directly toward it, the force on the proton is:

  95.16: A charged particle with constant speed enters a un+r p hz:z44vcgiform magnetic field whose direction is perpendicular to the particle’s velocity. The zvpzch44+:rg particle will:

  98.10: A charged particle with co/er)zpydg.9hnc( x aj, 6:o ,mjynqi3nstant velocity enters a uniform magnetic field whose direction is parallel to the particle’s velocitj(r xnhyompj,c yg9d 3n6z)iqa,: /e.y. The particle will

  03.34: A positively charged particlei1a z;68 waer2rkr )4ms3mdsx8fu ow: 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 fieks ;z4ar8 wfx1)m 6a usr miw8:or2d3eld 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. ;odx mk,oyo6 with constant non-zero 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 direction of the electric field in this region of space? Ignore gx o,ody; o6m.kravity

  04.14: A positive electric charge of b 138 ch ucdv0-w(ob dpqd-i4vnegligible weight is released from rest between the poles of a horseshoe o10cc-8 vi w-pvq b(hbd4d3du magnet as 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 of the page at an anglelb0dx1x d-5g3oiwll4 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 electrond-id504olx3bl 1x lgw?

  11.29: An electron moves witzca y3h9zj j sj +e.10clvc/j9h 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 in a plane *k s7 -rkf2o7w*ry/ jt rktsn+f9 vqq-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 forcefr772tk *s -/qrvkr - fsy*kq9wto+jn on the electron in this time?

  97.28: An ion with charge q, mass m, and speed v dxcvu59a8vdk :wm9l 6enters 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 unchanged, what will be 9xamv:w896lvkd cu5d the radius of the second ion’s path?

  16.44: A proton moves dw o65hux-9 buin a circular orbit in a uniform magnetic field B. A helium nucleus moves in a circular orbit in the same magnetic field. If each particle experiences the same9d- xu5hb6u wo 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 uniformuuphp/ig f+wv js ..2: magnetic field. The ions carry the same charge and have the same path radius in the magnetic field. Whi h:+w/p.i.u2vj gfsu pch of the following quantities must be the same for the two ions?

  02.15: A positively charged particle f2e qux4 p:q)zu53v7hcv5-tfcvm8yu 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 cp5v2u cxfz5vyf8 -het:7 q4u) 3qm uva constant velocity?

  96.40: A proton of mass M and kinetic e3n0 a a-sm e)ettl(cqaofu /3-nergy $E_k$ 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 electrica 7ib b kesib;7qqeuu073ily9o*m ;kh,lly charged beta particles is commonly determined bib9 ho; y7eb7q, s*ekbq;7u3 i0 milkuy

  09.27: A proton moves straight up the plane ornvk l.n+r98x f this page into a region that has a magnetic field directed to the right. If the partickx 8l nnrvr.+9le 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 page throughdpq7nbt.zy)qon;y n+9u g 8:v two regions of space along the dotted-line trajectory shown in the figure. There is a uniform electric field in Region I dire8ytbq:7n; +qynovznd gu) 9.pcted 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 velocity through a region of sl ei-0vcr m f:;87jp3 nq5)ookug7nx bpace containing bot )imo75:kbgcxq;n8p7l-v 3oernu fj 0h 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 between tw6 8 z9rd2vsatq2h7f3dhb x1u zo long straight wires. The conventional current in each wire has thtzq91zh3a72vd uh 286d rsbfxe 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 originates from an unseen external source.