09.18: A wire has a conventional current I directed to the rig9z4wx ht*3vuv ht. At the instant shown in the figure, an electron has a velocity directed to the left. The magnetic force on the electron at this invw tzx3v*uh 49stant is

  14.24: For the bar magnet shown in th4+d/ mjio:j.abbz / cie figure, which choice best describes the direction of th/a 4ibc z/jj.mdoi:+be magnetic 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 convwycxwtcx -d : /us4*8bentional current I shown. At the instant shown, what is yw s/c 4d:-ux *8btcxwthe direction of the magnetic force on the electron that is moving directly to the right toward the wire?

  13.30: Electrons flow to the lef. abq) m3j9ce;aibl 0nf7v k,it in a wire as shown. For the proton moving toward the top of the page at the instant shown, what is the direction of the magnetic force on mjl bca a)bik ,3eiq9n.v;f7 0the proton?

  94.30: The conventional current I in a long straight wire fldt sq*:u* bilyx6.3ln ows 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 di:btl6q * lxn*yd.s iu3rectly toward it, the force on the proton is:

  95.16: A charged particle with constant speed enters a uniform magne5tw*6n cl xkzch54b 5.nglpr:tic field whose direction is perpendicular to thk5l*g bn.5xzc65rtn :hl w p4ce particle’s velocity. The particle will:

  98.10: A charged particle with constant velocity 4u d7)w k wnzr7y49bx7w7 6u w7hlngkxenters a uniform magnetic field whose direction is parallel to the parn rz gxn7) x9 lbd7ww74kw6 7u74ywkuhticle’s velocity. The particle will

  03.34: A positively charx dd 9ml e *cct)-4h,9at;sqfvged particle of mass M is at rest on a table. A non- zero electric field E is directed ,d; ht-qm acf)d9l4e*t9csx vinto 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 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 ih0gwv m2nx707l:h 3tlus s8w dn a region of space that has a uniform magnetic field direc nd :slu72tl 0wms7xh3v08whgted 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 negligible weight is released fro5 gtd/v4yjf57wy*g0e ,ska pum rest between the poles of a horseshoe mag*t, 4syapj7gv fye5 0gwku5d /net 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 planr iuk*z(3mx 0ee of the 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 0zxr*i3 (mkue 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 witf(gimq3 2z9l tlgi h.9h 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 masrn1t2. p1dz7x7q l )jeqos /eq5wj1refa s+.ys m travels at a speed v in a plane perpendicular to a magnetic field of magnitude B. The electron follows a circular path of radius R. In 7qls tea1f.zq5op q1js/wed1+n7j)r y x.r 2 ea 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 aze rokk5o:e9 q,tc02d magnetic field B and is deflected into a path with a radius o9ktoeo05cr2 e kqdz: ,f 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 magnetic f n a q5vhma3 u9okyrk;,8/il,4b0mwasb ,0ohnield 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 rat3oqo ak0i b,5h y9 u4as,nr,;h/ma8 wnvklm 0bio of the speed of the helium to the speed of the proton?

  10.43: Two ions travel perpendicular to the sa.b49vyq kuyor )+(tww me uniform magnetic field. The ions carry the t(q 49w+rwoyk uy)b .vsame charge and have the same path 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 right. I 5gy9e- sgl(/gl+rc imt enters a region of space in which there is an electric field directed up the plane of tgs +grily 5ml ec-(/9ghe 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 energduk sdewg)-w ;lx1 2r7/xr +wuy $E_k$ 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 commonlytso z-t3 l y0y*gq8td7qggn1s48cfgn84 c5tm determined bc 8gtf4t 8qo1s0 -7t cg g8s znlt3yg5md4q*yny

  09.27: A proton moves straight up the plane of this page into a region that hao-m (fsld+4p7yfjmy;irm,p 1s a magnetic field directed to the right. If the particle is undeflected as it passes through this(rypm7 ds,my-il ;jffp +1om4 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 regions x .c0rzqmsl60i dgdy3:y ;/ ngof 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 direction of the magneq0g6nm0i lcd .y /s :dyrxgz;3tic field in regions I and II?
Ignore gravitational forces.

  12.36: A positive charge moves with constant velocity thre ( iz.zx5f3srm/4xso ough a region of space containxsfe/ .iszz3 r4m5xo(ing 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 loeo6q.1 m v.jchng 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 originates fro.6 evmcqjh.o 1m an unseen external source.