09.18: A wire has a conventional current I dir299:* 9qaovp6otojbdg- bwb s5dy( qqected to 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 instan(o odqoyq wbvq bps6d: t*b5j- 99g29at is

  14.24: For the bar magnet m1g/ebsyvkjh ..4g0w)ae tr bt2d s 94li(: vcshown in the figure, which choice best describes the direction of the magneti)v i: 9egjg/ev 1dkls2t44rmyt0s.wcbhb(a. c 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 current I show053m av )u59lws iyxzrn. At the instant shown, what is the direction)0 rlzas9u vi55xy3w m 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 we h 02dw rj7ld:kj4h6oire as shown. For the proton moving toward the top of the page at the instant shown, what is the direction of the magnetirlh:20 h4d jod 7ek6jwc force on the proton?

  94.30: The conventional current I in a long straigh u qj81;:serj )fjhlb5t 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 and heading directly toward it, the force on the proton is5rf 8bej)h:;qjls u1j:

  95.16: A charged particle with constant speed enters a ungpyuaqj.zt/ 2 im,h ,0iform magnetic field whose direction is perp h0 tg,,piuz.2 /mjyqaendicular to the particle’s velocity. The particle will:

  98.10: A charged particle with constant velocity enters a uniform magnetic fi+ld pvp.bvl dk.d 6;7ield whose dir7pv;ddpl . kv6ibl .d+ection 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-mv.)ak/aua k ; 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 table. What is true about the magnitude of the elvmu;a. )/ kakaectric 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 sp w.g6a mprng :mj2jj;198 vrrvace that has a uniformwjpn6:1 grrg;ajj.v v 8mr9 2m 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 negligiblehbnwiy61 e/ich(1k6 p weight is released from rest between th6h1i/pkw y1eci b6n(h e poles of a horseshoe 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 :;kujf4kp 2 bwthe 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 describesf4b up2j :kw;k the direction of the resulting magnetic force on the electron?

  11.29: An electron moves ktk*a i 3ag *f/b rg,y6q0dui4with 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 travex e aj7n,auamnu+p08oh,re2(is2 a 0 els at a speed v in a plane perpendicular to a magnetic field of magnitude B. The electron follows a circular path ix+ era208s,a npm7aue aj ho,uen2(0of 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, a 2y/ bjphk m:u469avmand 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 ju6h4 pa/kmb9am2yv : 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 magnetlpp lku 87f51(v;vlle ho8+ doic 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 is the ratio of the speed of the helium to the speedvov l7u+l 8flp(oh1;8 pde5kl of the proton?

  10.43: Two ions travel perpendicular to the same uniforrkv:h 0 l*h f(86jha m8jeqva5m magnetic field. The ions carry the same charge and have the same path radius in the magnetic field. Which of the fol05vmj 6fraehkah q8 :jvl(h*8 lowing quantities must be the same for the two ions?

  02.15: A positively charged particle moves to the .nqebi5 86die2lec s 9right. It enters a region of space in which there 2 id.56 eeslb98qecin 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?

  96.40: A proton of mass M and kinetic ener( j aid:2jpnp,gy $E_k$ 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 elead --wpsazsj 3lflbo*oz5c 18q.(. ntctrically charged beta particles is commonly determined byzl*.l -s5a o 3ca-.(s b8np d1ofqjtzw

  09.27: A proton moves straight up the plane of this page into a regigp*,cyfkuv,y40/msn0vc a q8on that has a magnetic field directed to the right. If the particle is undeflected as it passes through this region, in what difmu,y cgqa4sk08,0y cn*v pv/rection must there be a component of electric field? Ignore gravity.

  08.36: An electron moves in the plane of the page through yb g8e1qw7u*w two regions of space along the dotted-line trajectory show7 bwqu8gye* w1n 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 charge55+jajh)c8; nskwthtu 0 pd9vfhpw+; moves with constant velocity through a region of space containing both an w)kj pw;ah+vnj8hdt9s pu+ fc0;55th
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 r m uoh0r o+d 1jpslm 8f(pt-o1ho6grcn/+2 x2non-zero velocity directly between two long straight wirem6n -+opht rc2ohpd (lr10x/ou1 jm8 s+2gfors. 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 originates from an unseen external source.