If the north poles of two bar mag kpxdjf31rdyns59nq / l:ypxaze0j h.p5)3 e*nets are brought close to each other, the magnets willnpyj. x 0f5j/z9h) ddp ykr*q x5 13anp3ee:sl

  If the south pole of one bar magne;i7umf/k4:ge) qhj e lt is brought near the north pole of a second bar magnet,je): ifk lh eg/u7;4qm the two magnets will

  If a bar magnet is divided into two equal p yy5n0/b:rg crieces,

  The Earth's geographic North Pole is magnetika: xt8ztyi;q1w9 :mbc3og h7cally a

  The south pole of a l/- c,ghcwly0e 7p u/rmagnet points toward the Earth's

  An electric current produ(;vw0n b(r1r jo l:b3y*cx mmices

  Which of the following is c5 dx4blyk 0v dv84nn/norrect?

  A vertical wire carries a curren 66 vg3/a +olbajkp(n o(smtl(t straight down. To the east of this wire, the magnetic fmob6na/(j+ l6sot (algv3k(p ield points

  A horizontal wire carries a current straight toward y )go;yhruqn-r n3o8e+h1es 7vou. From your point of view, the magnetic field caused by this currune1v 7rrn 8ho y-g;+eoh )sq3ent

  A current carrying loop of wpecmz4 xh-,d9 ho.;+ jkry )rcire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? Tdz r +9cjo,y4r-)c .epm khx;hhe magnetic field

  A current carrying circular loop 3fwbuvmp) tgcew ic9-2 *:hg*of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the b2t-*cw mv* euc :h p)gfwig39direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fielp18 rllh0kl0ld is the

  1 T is equivalent tok h,yipls j1yp-uu 82:

  The direction of the force on a current-carrying wire in 4 xa/le7y:t. k+khsqwj tk260y ezzz- a magnetic field is described by which of the following kzzz7640 y+l e.2:jwak/x te-ykt hsq?

  The force on a current-carrying zpjhl:dhkw ,+)k fg-y9a-fdpd0 3a.oz)i/dkwire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic fielrun; y:+ua(b wd is equal to zero when

  A vertical wire carries a current straight up in a region where 7bxvu9 2h+5 sls+vtsnthe magnetic field vector points due north. What is the dihubv s 7n9l 52+vsxts+rection of the resulting force on this current?

  A charged particle moves and experiencesj6svxv/ j ,ls9w3-n7,te2dce. q hl2rfedjp: no magnetic force. From this we can cos,6 2t/cvlx ph-s , .e e7fjj 9nl2weqddjvr3:nclude that

  A charged particle moves with a constant speed through a region x;n;(dt /tv )5xdo fxbwhere a uniform magnetic field is present. If the magnetic field points straight upward)/vno t;txx(ddx 5bf;, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetico0v 2h5v;gs6 wa wo.i7yeh-dm force oov y5s;vhamweo.wi0d7 g6h2-n this particle

  A charged particle is injected into a uniform magnetic field such that3wyhh msh( 70ux11d1iu.jm, ttdjip0 its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particlej1(0dwy 7i xu0s m1dp,huhmth3ji .t1 will

  A charged particle is observed travelingcqchw xvv bi4o+2lp. 0su3 /e rar--4o in a circular path in a uniform magnetic field. q horc l+iv-/3c44pas2 weuxobv-r.0 If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circularxi l7hzx*qd gy*5 9w8i path in a uniform magnetic field. If instead th z95x 7lgwq8i*x*dyhie particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward 5e(nvud4/ dmp e:;u mdat speed V in a uniform magnetic field that is directed straight downward. The magnetic fp4dduu/ en:5(dm;mev orce that acts on it is

  An electron has an initial velocity to the south but is obseh9*u n fdwmoei*(ur)q1 l3 d.urved to curve upward as the result of a magnetic3.eqh )o*ulnf*(didw9m1 uur field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region wher1cbu9w)k-w nmi/+o:t nmyptzb6b / 5 pe there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, n/9 + :upwmc1ztb- b)bkty/wo65i pnm+y up, and +z out of the page.)

  The magnetic field produced by a long straight current(6) az-boxd idx mp+87swjeq:-carrying wire is

  At double the distance from a long curct q 6. i*fnkm4,ke)5y-qefa prent-carrying wire, the strength of the magnetic field produced by that wire decraye 6q pn.fqet*4ck-,5im fk)eases to

  Two long parallel wires placedguvun 1 . rxwz3+4e0vv side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away from you. From your point of view, the magnetic field at the point ex.wv xugnr1z 0evu43v +actly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table cara .6dm2hxim -gry identical current straight toward you. From your point of view,mm .-xi aghd26 the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. osb2*q-v pb(i The magnitude of the force between tbb2 *pvo( isq-he wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire3r 0y0w d;ngkt carries current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction o;y03rn wg0tdk f the force on the proton?

  A wire lying in the plane of the page carries a cmrzuhbpwje (2 yt0907 urrent toward the bottom of the page. What imbr2w9tp(ue0y 0z j7h s the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed ksa .k.3f x1v*oh ;h7mobzca 8side-by-side on a horizontal table. If the wires carry current in the same di* .h ;xfmkh1. 7saovbk8cz3oarection,

  Two long parallel wires are placj,bw0p z6 vl:ded side-by-side on a horizontal table. If the wires carry current in opposite d,dpl:0z6bj w virections,

  Consider two current-carrying circular loops. Both are made from oneyqj 0.jwh sei/dg g4orxy4)5/ strand of wire and both carry the )iyys j4x/ 5hwg 4o0ejq/g.dr same current, but one has twice the radius of the other. Compared to the magnetic field at the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying cirpd)wfnhtpzr9- z 7 ubpqp ;m6*u,.h ;cxx j,t+cular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius,-npm qu 6 ;,;pdw)t uztpz pxc*9j7rhf.xhb+ of the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop ih+1*s,h tmy h+gb,e. xg gsm-occurs when the angle between the loop's magnetic moment and the magnetic field ve,s, e+ hy+bxgshi*m1 m-g.thgctor is

  When placed askew in a magnetic field, a current carrying qi) 7jgwbl+ .,jrpe 5xloop that is free to rotate in any direction will experience a torque 5+l,)xgw 7jrbpie.q juntil its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric motrvdj3h m*kv/kxc( k5bsr 7m- :ors?3rj: rkxmvcd 75vb-s *k/h(km

  A circular wire loop lies in a horizontal plane on a table okm91pv ami -j le:.)l;7pp 0le: zixsand carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magneo.-1lvp :m9k :ejp0s i zx7la ;elp)imtic field points to the north and dips below the horizontal. Which side of the coil tends to lift off of the table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is v-jb2o t5*0 x5bleyvyaccelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular path of radius R. The magnetic field is uniform and oriented perpendicular to the velocity of the particle. Derive an expre-vt20leby b*5j5y vxo ssion for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through crossxu0 o q.oslc0.ed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocity will move in a straight line. In the following, disregard the magnitudes of the fields. In a velocity selector, the particles move c .losox0.qu0 toward the east, and the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a uniforcp*h95p +k sc db:n7ism magnetic fieldi5 c 7ss9:pp+hdkb c*n of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dirkdp5,xt at1/;s 1ho2)enttwa t -q 7irection of $30^{\circ}$ with respect to the direction of a 0.30-T magnetic field. Find the magnitude of the magnetic force on a 0.50-m length of the wire.

  What is the force per meter on a straight wire carrying y.wo4d 3z1dn;4 4j-o1h nvfzo jw hqa:5.0 A when it is placed in a majzh4w; jv3 4.4y -ozon dnfd 1ohaq:w1gnetic field of 0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.050 kg and il;o g16boh .ks0 1aouas in a magnetic field of 0.10 T. What min.oa1 bh lu61;a osok0gimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform mag ejznztw;0 10-fhwu; 51wsucv netic field of 0.20 T. What is the magnitude of the magnetic force o0t1 wjh 0z-e;1cnw uvszw5u; fn the proton?

  A proton moving at $4.0 \times 10^4 \; m/s$ horizontally enters a region where a magnetic field of 0.13 T is present, directed vertically downward. What force acts on the proton?

  An electron moves with a speemr6 u qtxg6:u-*zba2ud of $5.0 \times 10^4 \; m/s$ perpendicular to a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the electron?

  A proton travels at a speed of y 76dsv8buvxaia+k5)$5.0 \times 10^7 \; m/s$ through a 1.0-T magnetic field. What is the magnitude of the magnetic force which acts on the proton if the angle between the proton's velocity and the magnetic field vector is $30^{\circ}$?

  An electron traveling due nmf ma(kgi984 eorth with speed $4.0 \times 10^5 \; m/s$ enters a region where the Earth's magnetic field has the magnitude $5.0 \times 10^{-5} \; T$ and is directed downward at $45^{\circ}$ below horizontal. What force acts on the electron?

  An electron moves wi2z )vgxfx(mh t3r6jk v8ts (;eth a speed of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the magnetic force of the electron.

  An electron moves with a speed o(ry v x r7 8n(9ocprplg-osd./f $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the acceleration of the electron.

  A proton has a speed ofz/d;t p04. 2qhavnubx d)g/hd $3.0 \times 10^6 \; m/s$ in a direction perpendicular to a uniform magnetic field, and the proton moves in a circle of radius 0.20 m. What is the magnitude of the magnetic field?

  A very long straight wire carries a cg exyfgr yhr(;* nmnd1f :w-bf*m 8d lq-95vm0urrent of 25 A. What is the magnitude of the magnvmx9gfrhnrw 8;fyb-5d :f* dq el1n*0m y(mg- etic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A gener.gmt/pdpbd7o (4dp, o ates what magnetic field at the ground, 10 m atgmo/ddb.p4 dop, 7(p way?

  How much current must flz ;ea cq5nur *8pg4oiz0+h-l dj5vfj9ow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a currentah. 5ovkg, j7l of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic fieldv oga.lkj h75, of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. Theyu174ony flx; :pz +(w8 ngrntr are separated by 40 cm. What is the magnetic field in the zr nt4l8nfg 7+y1;no( urxpw:plane of the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite -sx1(.tn1b d nh 5wxp pc6l8kldirections. The wires are separated by 0.20 m. What is the magnetic h dt5l1.wn(n 1c6 k-x8bspxlpfield midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direi / +wo0(p6 jvyu0lyd)6q iyafctions. The wires are separated by 0.20 m. At what point between the two wires are the contributio ldjiyv 00+/aoi(6yy fwq6p u)ns from the two wires the same?

  Four long parallel wires each carry 2.0 A ino 5*c.btzx).dy n5wkl the same direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires* 5kxdzoynw cl).t .b5?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposite direc -w)n -qr kpdm)2wfy3jtion. The wires are separated by 0.30 m. Find the magnetic force per unit l r wy)f)n-mjpq-wk3 d2ength between the two wires.

  What is the magnetic field at the center of a circular loop of w fq9w+mrb x) 57/vkcbiire of radius 4.0 cm when a current of 2.0 A flows k vxbm9c )rfb+q7wi5/ in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fiein2+o6a 1l 6atu;hmv /)mxc jold is produced at the cuav 1oo)/ tcmj6a;mlxi62+hn enter of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 Ac )r 81rzytpmk, rmz4ut *ncw4 3lb8i7. What strength of magnetic fiel 8cz zty7 i 1m8l4m*4wntpu3r bkcr,)rd will it have at its center?

  How much current must pass through a 400 +bcv prijj8d,l( k+h; turn coil 4.0 cm long to generate a 1.0-T magnetic field at t+kp vrd(lc+j i,h j8;bhe center?

  How many turns should a 10-cm long solenoid h ugibq 6.ic)c)ave if it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectanvnh+4db 02f jigular loop of 120 turns that carries 6.0 A if i20 fih nvdbj+4ts dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magneticuaw :/4h)vb3v .6rlfdvgiqo5 field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane uh. v/)wqi:g6vbrla 3d5 fov4of the loop is perpendicular to the magnetic field?

  A circular loop of wire ofv u9t* f;lftf3 cross-sectional area $0.12 \; m^{2}$ consists of 200 turns, each carrying 0.50 A current. It is placed in a magnetic field of 0.050 T oriented at $30^{\circ}$ to the plane of the loop. What torque acts on the loop?

  A circular loop carrying a current of 2.0 A is in a magnetic fi 3uj0l 0ubh2gnr1 do*qeld of 3.5 T. The loop ho23rnb duq0h0u 1*g ljas an area of $0.12 \; m^{2}$ and its plane is oriented at a $37^{\circ}$ angle to the field. What is the magnitude of the magnetic torque on the loop?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0. +ehtrv 532iy(rjtc-32gr-g)dylca u30 T. The current i2adr2ry3tvtuc+3y)jg( -chlr -e 5gin the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fih7pef0ix ma,8 eld of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallxfh em a8p,i70el to the magnetic field?

  A circular wire loop of ar ju3-( ;v/pd);9qopevx z3lby bdnhk 0ea $0.25 \; m^{2}$ carries a current of 5.0 A. The coil lies in a horizontal plane with the current flowing in the counterclockwise direction when viewed from above. At this point, the Earth's magnetic field is $1.2 \times 10^{-4} \; T$ directed $60^{\circ}$ below the horizontal. What is the magnitude of the torque which acts on the loop?

  In a mass spectrometer, a single-charged particle (charge e) has a speed of-0d s2f2w amqc $1.0 \times 10^6 \; m/s$ and enters a uniform magnetic field of 0.20 T. The radius of the circular orbit is 0.020 m. What is the mass of the particle?

  A doubly charged ionrnqq:n;uv 4 m, with velocity $6.9 \times 10^6 \; m/s$ moves in a path of radius 30 cm in a magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?

  A proton travels through a potential of 1.0 l -l i0gsyty/zn:11zl kV and then moves into a magnetic field of 0.040 T. What is z1/01t:ylsgzlyi-nl the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnelqikj6k y4+ j2tic field of 0.30 T oriented perpendicular to its direction of motjlj+ qk46ky2 iion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV befor21el/zljpak1* g2( dk:vdsxde entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-fie 1/xe: *ldg2kpja(k zs1ldv2 dld is required if the particles are to be undeflected?