09.18: A wire has a conventional current I directed to the right. At the +bt k o93.vmyg5onz8j instant shown in the figure, an electron has a velocity directed to the left. The magnetic force on the electron at this instantm8o n39+ oz.bjy 5ktgv is

  14.24: For the bar magnet sh ) dz8i6kim .)p6g1l oz6gxonzown in the figure, which choice best describes the direction of the mip6gl). )k 81mzzg66 xiondzo agnetic 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 cozhn0 v 0zw:; - 8vlqzg(v8whzgnventional current I shown. At the instant shown, what is the direction of the magnetic force on the e0v0vg8-;gqh wv (zznzh:8 w zllectron that is moving directly to the right toward the wire?

  13.30: Electrons flow to the left in a wire as shod;bp)6 bnc3b-ml.kwj wn. For the proton moving toward the top of the page at the instant shown, what is the direction of mb6 c.bjpk3dn-l wb);the magnetic force on the proton?

  94.30: The conventional current I in a long straight wir21(r wdcg9yge e flows in the upward direction as shown in the firwg2ye(9cd 1 ggure. (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 is:

  95.16: A charged particle with constant speed enters a uniform magnetic field wh i9ib0cug)0,afdm-+scm z4r gose direc ggm4)fc0i 9+, sbizumadr0c -tion is perpendicular to the particle’s velocity. The particle will:

  98.10: A charged particle with1por/o6rdy,9qh1xm vfj++a k constant velocity enters a uniform magnetic field whose direction id+ /+,1vm o r1ho9jayfxp6kqrs parallel to the particle’s velocity. The particle will

  03.34: A positively charged particle of mass M is at rest on a t4 x)f;amiika 9;of tq7able. 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 electric force on the qfoa9)fmkt7a4 xi i;;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 regio fcy:j.tu my5*x1lk w3n of space that has a uniform magnetic field directed int.w:tyufxmkl cj5 3y*1o 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 i, yw-ymky),e5jnfw* /sj enz2 s released from rest between the poles of a horseshoe magnet as shown. What would be the direction of the acceleration of the charge caused by the m*-enz 5kwjw2s ,/yyym ne), fjagnetic field?

  10.26: An electron moving in the plane of the page at an angle of 300 to b476vk) kprxqq, rzx/ 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 electk rv)z, 4rx/qkpb7qx6ron enters the magnetic field, which best describes the direction of the resulting magnetic force on the electron?

  11.29: An electron moves with 3iudx6n72q c lspeed $1.00× 10^3\: m/s$ 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 trask,j i1 o +l(m):xbwqgvels at a speed v in a plane perpendicular to a magnetic field of magnitude B. The electron follows a circular path oqi j kmws,gx+)o(:b1lf 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 spezxw w/hpu slul 90(f..rmek20 ed v enters a magnetic field B and is deflected into a path with a radius of curvature R. I(0su.kwfh/ eul92wpzrl m .x0f 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 field Ba gi p (4w 9n6i8z.+qi6qodedb. 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 speed of the 6p o+bdq4i(i .9 eziwq n8ga6dproton?

  10.43: Two ions travel perpendicular to the same uniform magne a/ hmv,.cw/zftic field. The ions carry the same charge and /fzhvmc/w, a. 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 zy4sp dfc (e/stlhi8 4ff/i+ )charged particle moves to the right. It enters a region of space in which there is an electric field d/hzd)yi/f( fc+e tsif8l sp44irected 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 kinetm e+ hc63oqzu1ic 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 c5a *rh3n c8,qflv(sxvharged beta particles is commonly determined by,l r8nfv(c 3 5xqv*has

  09.27: A proton moves straight up the plane of this : +he-:tyhytupage into a region that has a magnetic field directe: he:t uy+-htyd to the right. 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 to:q ;: xyk)3edhz4jwqhe plane of the page through two regions of space along the dotted-line trajectory shown in the figure. There is a uniform electric field in Region I directed into the;j d)3yw:k qh:xzqoe4 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 conuka u.okr i*.e2k/j4*7pqse tstant velocity through a region of space contau/j* 4.rke kou72 keisq.p ta*ining 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 conokjy w bc+i+- 28ussoh)70sru stant 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 field that exist at the location of the electron? Any electric field in the region originats kbc7s0 yowuo+rush2ji+ 8)-es from an unseen external source.