09.18: A wire has a conventional current I directed to the right. At the inj7rimm7b*a - dstant rdma 7bi-jm* 7shown 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, whic/2hosw5ok (bah choice best describes the direction of the magneok2ao/5sbwh ( tic 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 codbuk 5 xsc-2+ 9 1vyg9jjp.ybfnventional current I shown. At the instant shown, what is the direction of the magnetic force on the elecyjf9uk spy5 vc19b b.g2 -d+xjtron that is moving directly to the right toward the wire?

  13.30: Electrons flow to the left in a wire as shown. For the protoy e 9j.rw1di)dn moving toward the top dd91 j)w yier.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 upwar5o urfb :f lpn3:ki6b;k /)obyd 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 force on the p5bkfrfob i3;/bpln: kuy 6: )oroton is:

  95.16: A charged particle with constant speed enters a(v8lxk.zr9l 2hwg qr8 uniform magnetic field whose direction is perpendicular to the particle’s velocity. 92.8glzl kx8vr rqhw(The particle will:

  98.10: A charged particle with constant velocity enters a uni7myt 9gke(h5vform magnetic field whose direction is parallel to the particle’s velocity. The parti7yke 5gv9m th(cle will

  03.34: A positively charged particle of mass M is at rest on a table. A non- zerjtn9wj w.gd.c +uw44po electric field E is directed into the plane of the table. A non-zero magnetic field B is directed out of the plane of cjg9 n4+wj.4dw. u pwtthe 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 0;fj,jyh8m+srpix8 evelocity 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 el jx+s e,8ijy8p;rf0hm ectric field in this region of space? Ignore gravity

  04.14: A positive electric charge of negligible weight is released from rest6krw35q:813a hd) fbga mnwt y between the poles of a horseshoe magnet as s b1df6r mgat3)a58qnky3wh:whown. 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 anxjdi/y pzilxz3c0v, bx) )(r; angle of 300 to the horizontal enters a region with a xj br(xixilzcyd/pv) ,0 3)z;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 magnetic force on the electron?

  11.29: An electron moe.a ehp7ai 85hves 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 ma 7:2zfv4mz tc*x.sr rbss m travels at a speed v in a plane perpendicu.s:fb*r4mxr2zvz t7 clar 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,-5 4d4d4w;hmebi pb lh mass m, and speed v enters a magnetic field B and is deflected into a path with a raw-l4db4he45ib;m pdhdius 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 inw(s s; 2 e7wk.pthvy*c a uniform magnetic 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 the ratio of the speed of the helium to the speed of ts;ew7wsthp .(cyk2*vhe proton?

  10.43: Two ions travel perpendicular to the same uniform magnetic field. The ((b o 5w qrgsstc 5kybp8;1-mvions carry the same charge and have the samob8s py;51-5q (t(gcbsvrkwme 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)s lsa9fdg)2x ly; cq. the right. It enters a region of space in which there is an electric field directed up the plane of the paper (see figure). In which direction2) qxsy flcd9 al.g;s) 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 kint0 h9)wex65dbsrlb;a etic 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 d-ap,*9owgh ka l1iccxy22 m 2charged beta particles is commonly determined byic9hpawc,lxm -d1og 2 *y 2ka2

  09.27: A proton moves straight up the plane of this page into a regie;scvk x6il6cp/9+ e non that has a magnetic field directed to the right. If the particle is undeflected as it passes throughx9c6 kln i +c/pvs6ee; this region, in what direction must there be a component of electric field? Ignore gravity.

  08.36: An electron moves in the plane of pb h : /* /qkym51amc rxr(q7,yvb/klwthe page through two regions of space along the dotted-line trajectory shown in the figure. There is a uniform electric field in Region I directedy*v5blbcr ,q7/rk( amk p x/y hwmq1/: 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 through a regio zb y,g7a m-rub6,+rayn of space containing both a-gbraba6+y,zu y m,r7n
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 bebr8k za2z37ef 0wgb sk67yye /tween 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 electr3 f7k/ek0egybbw2zza 67sr 8yon? Any electric field in the region originates from an unseen external source.