09.18: A wire has a conventional hy kgz/06k dp ;afxm).current I directed to the right. At the instant shown in the figure, and0ph6m ak; g/z)y x.kf 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 best describe5o 8(pt -eqowns the direction of the magnetic field at the point P located directly above the center of the magnet?ew8o(-oq5 n pt

  11.34: A wire lies in the plane of the page wito kn9xz+a:uvrx/ ud2 0h conventional current I shown. At the instant shown, whatxa/0kuv :9dou2xn+z r is the direction 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 wire as shown. sxscg5 y;( jcybip80u:9qg1uFor the proton moving toward the top of the page at the instant shown, what is the direction of the magnetic force 8qy uy1g;p0gci scxjbu5(9 :s on the proton?

  94.30: The conventional current 6lldsgb ,j,m3I in a long straight wire flows in the upward direction as shown in the figure. (Electron flobl j6l ,gs,3mdw 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 speedpqs 9wwby e:.- enters a uniform magnetic field whose direction is perpendicular to the particle’s velocity. The ywe-9.wqpb:s particle will:

  98.10: A charged particle with constant veg;x7cic82 xt.(tjvok+; olr g.kj 4uolocity enters a uniform magnetic field whose direction is paral+7l(kt.8;o . t4 2crvgjx;oo xgjuckilel to the particle’s velocity. The particle will

  03.34: A positively charged particlea1b.q 4 jcwk* ; ueoko2a)6h39wopw l;h*dgwn of mass M is at rest on a table. A non- zero electric field E is directed into the 2)aokc b;wh6gadwjl1oup w*n43.;e*hk 9oqwplane 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 in a region of sp6zvu:m; br (8s 1hyusvace that has a unifm8(s v rv;6y :zushb1uorm 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 negl2 o,mo3j(xcu zj;u .han6f rh2igible weight is released from rest between the poles of a horseshoe magnet as shown. What would be the direction of the accemo.f;c xh,2jj2zn(u6u r oh3 aleration of the charge caused by the magnetic field?

  10.26: An electron moving in the plane -n1.,,yk k0ofd fg*1u,ll3q njxhrn rof 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 the instant that the electron enters the magnetic field, which best describes the direction of the resulting magnjf qrkdlofn10 ,n. xhr nk3-g,u1ly, *etic force on the electron?

  11.29: An electron moves sl1ct * cr3pn,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 m traves6vn onfs6wy 37u1ud 6ls at a speed v in a plane perpendicular to a ma un3onsfvsw6d 6176u ygnetic 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 eyihn-6m5oa:xcq1p2 f nters a magnetic field B and is deflected into a path with a radius of curvature R. If a second ion has speed 2v, while m, o21n5h-x: cpq6 iyamfq, 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 m3nw.rps.p+n kxthpe2c w/ k86agnetic field B. A helium nucleus moves in a circular orbit in the same magnetic field. If eacp2t.kwnke8cr6npx+h 3p . s w/h 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 perpendicular to the same uniform magnetic field. 8 .4gdvjz;hr kThe ions carry the same charge and have tj gz4h8 .;drkvhe 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. It ey6kjc5 h: bi/dac .wd7nters a region of space in which there is an electric field directed up the plane of the paper (see figure). In which direction docd j6hkw:c/ bayd 7i5.es a magnetic field have to point in this region so that the particle maintains a constant velocity?

  96.40: A proton of mass M andbyzx s6z/k4 o6 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 chaix(y13 / dgsutrged beta particles is commonly determined b(1 dxut3/ysg iy

  09.27: A proton moves straight up t5sn): (sf+g 7oddd4sk:d xlpche plane of this page into a region that has a magnetic field directed to the right. If the particle is undeflected+ x 4:5f s7 gsl)o(ddpdnkds:c 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 regions of sg2833d/ouwqt60ox.s l-8 icrhaqfu m pace 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 Re8g6o d2mwhtqu3.lxo/raq -0 3sf8uicgion 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 th6fg0qkat. r x*r/dy5wk2ah k hd4,sfh1g o:-mrough a region of space containing both an ,:*q rkr- mky12/w haxdd5ghfs kft4gh6a o.0
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 direcwq 5m c8k(pd+vtly 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 loc(pdc5k8 +vwqmation of the electron? Any electric field in the region originates from an unseen external source.