09.18: A wire has a conventi., pq5iqtlws+m6i.nblzp* /ponal current I directed to the right. At the instant shown in the figlis *ntm. lzpbq+ 6/.p pwi,5qure, 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 figurn;dpg8 6h qme8e, which choice best describes the direction of the magnetic field at the point P located directly above the center op8menh8g6dq ;f the magnet?

  11.34: A wire lies in j nxz8 i-vmyig0;3t0f3 +zhm nthe plane of the page with conventional current I shown. At the instant shown, what is the direction of the magnetic force on the electron that is moving directly to the right toward the f+ 3vmy0z g3xmj8;0intn zhi -wire?

  13.30: Electrons flow to the left in a (o;lwh.t qom;wire as shown. For the proton moving towar ow mho.lq(;;td the top 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+:w fm l*6oi-.v aatzc flows in the upward direction as shown in the figure. (Electron flow is downward.).c wf-ta+vil *zm:oa 6 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 *dzc+k8bx7j ffield whose direction is perpendicular to tb8kf+z*cj x7 dhe particle’s velocity. The particle will:

  98.10: A charged particle with constant velocity(b 70y) zpsahyfv8,sc enters a uniform magnetic field whose direction is parallel to thbcz (vs87,yhp y)0 asfe particle’s velocity. The particle will

  03.34: A positively charged particle of 1ga+9sw ktr9m;9nwxbmass M is at rest 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 abk9w gs 1t awxnrm99;+bout 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 djqz64f;98 pghz mv s4velocity in a region of space that has a uniform magnetic field directp8gzs 9;v4hm46 fdqj zed 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 re iks)/ pqwyk6 6v*cfsz,**eelleased from rest between the poles of a horseshoe magnet as shown. What would be the direction of the acceleration of the charge ca6k6c*lieqsp ,*z *fyew vs)/ kused by the magnetic field?

  10.26: An electron movingwonh )s/m70bbqrvtlj77a )m tihl2 ;7 in the plane 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 the instant that the electron enters the magnetic field, which best describes the direction of770h)2rs no7q7w )a;lmmjb tbt vl/ih the resulting magnetic force on the electron?

  11.29: An electron moves with speed t;m2 7/qs ayy5mjv*0lvd :uku$1.00× 10^3\: m/s$ 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 o9hv9 m 9oo+lm−e and mass 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 a time t, the l9ovo9 9hmm+o 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 6x pw85(ll2oz kzup k7q, mass m, and speed v enters a magnetic field B and is deflected into a path with a radius oul76pk8o2x5plwz z( k 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 circ0*yx6i2 jwi t( 7w bwntrjz-p/ular orbit in 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 spe iirzjj0y2xp ww7t6 /(tnb w*-ed of the proton?

  10.43: Two ions travel perpendicular to tov1 mnhhwixjjy5-2 ; +he same uniform magnetic field. The ions carry the same charge and have the same path radius in the magnetic field. Which of the following quantities must bejxjh2 +15-omw vih; yn the same for the two ions?

  02.15: A positively charged particle movq:/l)mqc nin d,8 d9nqes to 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 direction does a magnetic field have to point in c/,9 : qqln)nmd8i qndthis region so that the particle maintains a constant velocity?

  96.40: A proton of maj3:4oi*em gymss M and 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 q.o*vx px:1x7 fc7fnzcharged beta particles is commonly determined bf 1*xc.vpx7 f:oz 7xnqy

  09.27: A proton moves straight up the plane of this page into a r4 ( kb+v +7wqaejr9fs4lg k.vtegion that has a magnetic field directed to the right. If the particle is undeflee4aq7tf. ++(s4jlwvkbg 9krv cted 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. (f del47wur d.-*ml 72ltqm op4vtyr 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 plane of the page (as shown). There is no electric field in Region II. What is a necessary direction of the magnetic fv r7ut oy2m dlr44mew fp .qdtl-7*.(lield in regions I and II?
Ignore gravitational forces.

  12.36: A positive charge moves with consta+a 4kglf 3gj5m;s mu0nnt velocity through a region of space containa+g 3l5 us mkgj;f4mn0ing 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 consnvvo7 f4gk5p0 tant non-zero velocity directly between two long straight wires. The conventional current in e 04k7nvv 5gpfoach 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 from an unseen external source.