09.18: A wire has a conventional current I directed to the right. At the instan:6s3 i-8o v+bk96erxlq hln pkt sh36+-kkqlbp 8lvix er9sno: 6hown 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 the figure, which choice bes*e/b ) (fw 4-jrsans0 xx-toaft describes the direction of the magnetic field at t*xs0 a/xfsaf)nobe ( 4jt-r-whe point P located directly above the center of the magnet?

  11.34: A wire lies in the pwm f1v a+61wdt e)(heslane of the page with conventional current I shown. At the instant shown, what is the direction of the magnetic force on th6mh1wt)e1d v fs w(+aee electron that is moving directly to the right toward the wire?

  13.30: Electrons flow to the left in a wihx01xxqqz 9 r/re as shown. For the proton moving toward the top of the/xq rz01h9q xx page at the instant shown, what is the direction of the magnetic force on the proton?

  94.30: The conventional cure3pgiu)(fd ibi ji(5:dsoj mdw/ )o24rent I in a long straight 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 eb5) si igi( :2opjdfi(j /4du3w m)odforce on the proton is:

  95.16: A charged particle with constant speed enters a uniform magnet4lr r9m:8qwj0lxrma * got1.oic field whose direction is perpendicular to the particle’s velo0r *9loxm.gq4:or r18t ajlwmcity. The particle will:

  98.10: A charged particle with constant velocity enters a uniform6 le+*mwq sy;u magnetic field whose direction is parallel to the particle’s velocity. The particle +wqu s;e*y6lm will

  03.34: A positively charged particle of mass M is at res qsu3 bs6xm9a)m+/ 2kbc a8qnnt 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 the qx86k as 2bbn/u+ c3mmansq9) electric force on the particle $F_E$ compared to the magneti force on the particle $F_B$?

  16.24: A proton moves wito- + eiigz.y4b baap10h 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 electr o1 ai-gy+bib0 a4ezp.ic field in this region of space? Ignore gravity

  04.14: A positive electric charge of negligible weightern:, tyr6;ksbd t5 3i is released from rest between the poles of a horseshoe magnet as shown. What would be the direction of the accele,dbiy 3;:rnk5 rtst6 eration of the charge caused by the magnetic field?

  10.26: An electron moving in the plane of the page at an angle of 300 to thuh6ot 98mm pqvyl 0-:) mbx9tde horizontal enters a region with a contq hyob m 8 )lumdtv:9-9x0m6pstant 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 movem: wznp;5 b7ql i,ook+1, o 8kjhtqj1es 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 mdhag q,y4ek). ni ey75 travels at a speed v in a plane perpendicular to a magneeed h,g5niy yq.4 k)a7tic 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, andn4 btr19/*6eqik g6sjj oeoy( speed v enters a magnetic field B and is deflected into a path withe1i4qjj y b96o/reg 6o(*snkt a radius of curvature R. If a second 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 magnew qn sw,).2-e/idg z5zfuoe+b tic 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 t- +nb5oze./sqzu f)wge,i wd 2he ratio of the speed of the helium to the speed of the proton?

  10.43: Two ions travel perpendicular to the same uniform magnet4 a*teqh k5a7x1ilb kb:ct:2wq /,asvic field. The ions carry the same charge and have the same bsb4e 2q hakti :715kv/w*cal,: tqx apath radius in the magnetic field. Which of the following quantities must be the same for the two ions?

  02.15: A positively charged particle moves to the nbj 6qba*w1*mwh prq/7 )m9pi right. It enters a region of space in which there is an electric field directed up the *6*pr imbqmh)nw wb1ajpq9 /7plane 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 energy/ rp cpu5vqfu4 c9l,g6 $E_k$ 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 palthin 3fmzkaddbi h85d3f g1.(: .t-wrticles is commonly determined by tf g3blda.:(dwf-n.ii 3tdh 1m58zkh

  09.27: A proton moves straight up the plane2qcob 4n- 6k/egi 6o;yknqv6s of this page into a region that has a magnetic field directed to the right. If the particle is undeflected as it passes ogecs6k6k4ni2q oq y-6/;n bv through this region, in what direction must there be a component of electric field? Ignore gravity.

  08.36: An electron movesasqj+ zn+zz7yx h1+/y in the plane of the page through two regions of space along the doahjy+zn7 /sy+q z+1zxtted-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 direction of the magnetic field in regions I and II?
Ignore gravitational forces.

  12.36: A positive charge moves with constant velocity thr4u32 bkg 4of tgp h8pw-myu0k7ough a region of space kom4gwbf ukgt 47p py3-u2 80hcontaining 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-zero velocity directly between two lk:tok+db1fb8. f ,bjhong 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 magnek.b8f+dbtj,b1:k fo htic 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.