09.18: A wire has a conven 9g:l1woz3myttional current I directed to the right. At the instant shown in the figure, an electron has a velocity directed to the left. The magnetic to:9lzwg m31y force on the electron at this instant is

  14.24: For the bar magnet showt 3ckydt8,l, wn in the figure, which choice best describes the direction of the magnetic field at the point P located directlytd3 ,l,kwt8 cy above the center of the magnet?

  11.34: A wire lies in the plane of theidfeh0w:f a6:+ r6zn+ mfoi*a page with conventional current I shown. At the instant shown, what is the direction of the magnetic force on the elec6iw erna f6 +:fo:md0 *zia+hftron that is moving directly to the right toward the wire?

  13.30: Electrons flow tousgwog-g 3ewgal ve 2 +4,9jjis*0cg- the left in a wire as shown. For the proton moving toward o0e -we9ggs 4juvlj*+-ggwg3ia ,sc 2the 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 ).zf vbs -x)ezupward direction as shown in the figure. (Electron flow is downward.) At the instant a proton of char eb)vsf-x)z z.ge +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 constan2dqgqra:s:aa 5bo h23)kv k:wivaz4+ t speed enters a uniform magnetic field whose direction is perpendicular to ka:3z::h2r)a i 4kv ad2wv +oqags bq5the particle’s velocity. The particle will:

  98.10: A charged particle with constant velocit 9;fxkq)y.wnq ,j cji-y enters a uniform magnetic field whose direction is parallel to the particle’s velocity. The partick)x qjw9yncq;.- fji ,le will

  03.34: A positively charged particle of mass M )p:di-r;b y*n lqjyxq m+,-ols0v7fv 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 table. What is true about the magnitude of thd- qrl 7byxf-+ljoinvmq*: p);0s,v ye 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 m6 hwpwdewt8994z u vdf)9c:h in a region of space that has a uniform :whm 94wec)vdpud8 9z9tfh6w 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 negligib;mv tz-jcew*y g86-gl 3(aaznle weight is released from rest between the poles of a horseshoe z8;z -gy leg j-m*3cw6(nava tmagnet 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 cytilu w:,) ws.9 j2cban angle of 300 to the horizontal enters a region with a cocw.cw )j:iytu,sb9l 2nstant 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 electron?

  11.29: An electron moves with ey /+,iq7jieu zz9ys/ 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 ym85b5l; db xy 9lf,qsmq )6juin a plane perpe;96s 5q)ml x8u,5 qbbfyyl jdmndicular 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 the electron in this time?

  97.28: An ion with charge q, mass m, and speed v enters a magno+-a ygi qo8i/etic 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, whato-+ ia/ gqyoi8 will be the radius of the second ion’s path?

  16.44: A proton moves in a circular orbit in a uniform ma 5kxcv1y(c0:* w hiwiugnetic field B. A helium nucleus moves in a circular orbit in the same magnetic fielw( uwkccvi0 xy1:*5h id. If each particle experiences the same 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 perpekd wc8lv1j: y8goj:u4ndicular to the same uniform magnetic field. The ions carry the same charge and have the same path radius in the magnetic field. Which of the following quantities must be the same for thec4d8 8:kj1uw ljgo:yv two ions?

  02.15: A positively charged particle moves to the rig u;immk3hf0o 7a9c/bcht. It enters a region of space in which there is an electric field direb/3oah 9;fu0 mimkc 7ccted 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 an iv*0c 2fiyrkp 7xv3fgft*48re7i 3sld 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 determined* hcw+cxr k0f6g-2k bp bygpw*f b k0+xcckr-62h

  09.27: A proton moves straight up the plane of this page into a region that c bj as+y;.9vh ao..vjhas a magnetic field directed to the rig.ja v yo+a.. sjvh9;bcht. 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 page through two re(. 2dd :di* v s8gmgb2f8axxkagions 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 electric field in Region II. What is a necessary directa2i8dx kdax:vfg sg ( 2.8m*bdion of the magnetic field in regions I and II?
Ignore gravitational forces.

  12.36: A positive charge moves with constant velocity through a re eo)i-2wsx4a/t +elgf:m,qt j gion of space containing 2wqe+i afet) sm4t,/ xjgo: l-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 constab-2omn2new3 (8yctzm nt non-zero 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 feo 3ycmw-n28t 2 (znmbield that exist at the location of the electron? Any electric field in the region originates from an unseen external source.