If the north poles of two bar magnets are brought close to each other, te 8y(ch nf47hp3)tzof he magnetfnct4h38y p(f) zh7o es will

  If the south pole of one bar magnet is brought near mk*-b2g9 ayi8scl)b zthe north pole of a second bar magnet, the two ys)m z ai9*b8clg2-bkmagnets will

  If a bar magnet is duc)p)a()gd.n -8gcfe b vqh1hivided into two equal pieces,

  The Earth's geographic North Pole is magn 4sey.jm6 kv0oetically a

  The south pole of a magnet poi5,a h (q;odxy1q 2 ,tvh;arstmnts toward the Earth's

  An electric current p t 0ye6txiiqk3q23fg 3roduces

  Which of the followi yh7;ov+0t huewg -nu+ng is correct?

  A vertical wire carries a current k:xxwx u6fzs5roqs8;e p8)7estraight down. To the east of this wire, the mxr:8 fewx)os k 8sx5pz76e; quagnetic field points

  A horizontal wire carries a current straight toward you. 4l gk+zys e-jl6v* q.gih(0hr1rl pv1From your point of view, the magnetic field caused 1ijp(z 4-l+0lglv.ghe k*rv sy61qrhby this current

  A current carrying loop of wire lies flat on a table top. Whenv1r ftao gz;zw(6 tohjye0*43 viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field causz*t1j h fg6 v4 tr(3ozeway0;oed by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on v 3an,gup t-j/a table top. When viewed from above, the current moves around the loop in a counterclockap /n3jugt,-v wise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field ,o hk6u7vm + qyc5pe)flfa/z:iw5b7ois the

  1 T is equivalent to7.c0 gskao ./m lfae.6xy2mvm

  The direction of the force on a current-carrying wire icq e672sqicaxt0j 0x1n a magnetic field is described by whe6a s 12j xti00cqc7qxich of the following?

  The force on a current-carrying wire in a magnetic field is the stronusblw4vql /1 aw-*n1.z vz9xfgest when

  The force on a current-carrying wire in a magnetic field is e *;e:hpj3i glkqual to zero when

  A vertical wire carries a current straight up in a re1 gjhh3t bo17y;zc 0 f8.zaqyfgion where the magnetic field vector points due north. What is the direction o3j1y qh.yao g01f;cf78 thzzbf the resulting force on this current?

  A charged particle moves and experiences no magneticu)+ 3ware kip8qp(b+o force. From this we can conclude thq+w ()opp3+ uab8rkei at

  A charged particle moves with a constant speed through a region whereq t r,5*0cbqoy a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle ,qbrytq o *05cwill be maximum when the particle moves

  A charged particle moves across a constant magnetic field. gp5ikdih, cb4 j6o0 f0The magnetic force on th0k gpdjfh oi c,i4605bis particle

  A charged particle is /v dds8o/ r:kyinjected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. yr s/vk/8do :dIgnoring the particle's weight, the particle will

  A charged particle is observed traveling in a circula8 i8:d mgemx bk5xvy*sm578 brr path in a uniform magnetic field. If the particle 588e dkgrv5yb 7mi*x mm: 8xbshad been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in (va +u7e3izgwf31wup 4mr z6ka circular path in a uniform magnetic fg7 z3pi uf1k6wvua z(m e+rw43ield. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instanm u.)r5 scg29di no7xtt, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force txg uom ts5)7i.n2rc9d hat acts on it is

  An electron has an initial velocity to the south but is observed to c+:(bf +hc,pwo (xpg0a 5kzzvyurve upward as the result of a5 ow(zbahp:( pf 0+kxzyv,gc+ magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region n4.vetwdyjb;r*92m u where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up,rydb wv.m92n e4jt*;u and +z out of the page.)

  The magnetic field produced by a long stpcay - l5lr.y tq+ta hmt2ta94cf 4-r3raight current-carrying wire is

  At double the distance from a long current-carrying wl:+;dp) cw/xcd) qg dxire, the strength of the magnetic fieldx cw:/xp) qdd+c )gd;l produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry ident 3rqy03kb:vm+p :*pshnyg3a 3/ on omtical 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 exactly midway between the two w:p3 ahp to y om*r0vbs+: /q3n3mkn3ygires

  Two long parallel wires placed side-by-side on a horizontal table carry idq1h g3ex5u7q,. k qrbsentical current strqq,qu17re 5k. hx3bgsaight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carryu38bti d;wqrx1t(j u: equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wu(x;u:diq1tw jt3b 8rires?

  A long straight wire carries current toward the east. A proton moogv+ ipgl xywcp v;/s7b77wx/f; 7w1eves toward the east alongside and just south of the wire. What is the direction x e7pw7x7g/lg ;+1ywibo /csp;7fwv vof the force on the proton?

  A wire lying in the plane of the page carries a current towardnp1zyq9 a8 xnw8 od6),vribj.va9b; h the bottom of the.6z9 nbbo)jdxva; w 188ph r9vqny,a i page. What is 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 side-by-side e2uy+ wo hwg03z :u*yqon a horizontal table. If the wires carry current in the same di:2h y3gzw 0*e yw+uuqorection,

  Two long parallel wires are placedb v x(zvq+8rr u;)po;b side-by-side on a horizontal table. If the wires carry current in opp+;vu) brpo bx;(r vz8qosite directions,

  Consider two current-carrying circular loops. Both; .ggd6gvqd9 j are made from one strand of wireqjd.9;gv gd g6 and both carry the 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-carryin g 3kz7x-;7g.iar xfft,hixm- g circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the ma7 i-mgfr-x3x,kt z fxh.ai;7ggnetic moment of the larger loop is

  The maximum torque on a currec. qg;xatcxdh4qhs:zb +,7)int carrying loop occurs when the angle between the loop's magnetic momet,d7hq4h xq;a cizxg)+.:b csnt and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is;ft6jd alvt( lixm n pmlpzj*:v4(32. free to rotate in any direction will experience a torque until its magnetic moment vectpllt3 i z ; p(:d4*vxnaj2vlj 6t.mm(for

  What fundamental fact underlies the operation of essentially all elexl- )wldg x*/hmho :(jctric motors)x ( lhjwhdg x:lom*/-?

  A circular wire loop ln7sjvf*t, .ot.7yk y-0-uq4j denpxw4o nwx0 ies in a horizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dips below the horizontal. y4dt e7js,.ovf0w- .on yt-*0wpuk74 n qxxnj 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 accelerated th1vg fj4 0h.4ca+ sovkmrough a potential difference V and allowed to ente4.agc+vs1 jm hkf40 vor 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 expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists o n )jwqrh *f9.bd98cj/fw0 teof a charged particle passing through crossed 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 toward the east, and thcno80f/dh * r.w9 9twjeqf) bje 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 uniform magngj(g i4q8rxj 6lz4z o; q6q1nfetic fiel4g;zr 6zjjo n8i64qx q1( gqlfd of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current j;8 pp 5kyc7x(wgax4 tof 10 A in a direction 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 straigh w, t 0dk-5iwe*)votcpt wire carrying 5.0 A when it is placed in a magnetic fitvepw d)*c0tkwio-, 5eld 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 is in a magnetiywvau 0 zlv-t;l )21ufc field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel 1z)l w ;-uuyatv2lvf0the weight of the rod?

  A stationary proton is in a u2 kgxz6s7oa;y4i+j p- * .sm4po6 j3cntqfeas niform magnetic field of 0.20 T. What is the magnitude of the magnetic force on th4cpz24oj-6oga7 a3+y;e* nsk6tq m sfis.jxpe 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 witp+q/no(z /dy/ ol :uhq i6uyp(h a speed 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 spee- *nh)u 3fmfl n9w)jsyd of $5.0 \times 10^7 \; m/s$ 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 nort+*9ik injkt 3wh 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 with a speed wph5nwv 8*7p--x bi7uw xjmrr s5k3c+ 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 sp (dvtt* 9gar;w/5-kvawtd h dm.3*hceeed 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 acceleration of the electron.

  A proton has a speedcw o s0j0b(ttga /7ee/;:eon l of $3.0 \times 10^6 \; m/s$ 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 current of 25 A. What is the *q7xs7y yt-pw off)3f magnitude of the magnetic field at a distance of 0.1- oftq7yfswy37fxp* )5 m from the wire?

  A high power line carrying 1000 A generates whglc 8edc /j.;9 ukly5aat magnetic field at the ground, 10 m aw key8clja/l 9gd.u;5cay?

  How much current must flow forg:o d4 dtqq-zgan 0 a8q0*hra) $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long stfgu (,eea63e 3ukda 2traight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equa6,f3 g(ee a2uta3d ukel to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in o)yqq dj42 z g.n5pod7+e 1tyd i1ywfg,pposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 2d fyn4)d ygi5qd+7y1, 1qg ejtwo.pzcm from one wire and 60 cm from the other?

  Two long parallel wires d q;eeeisgb5;8q67dyh oj7a : carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the two wisddee ge q:65h8i qbyo ;j7;7ares?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposima4wel6pe( 8 ir6gly,u, )zktte directions. The wires are separated by 0.20 m. At what point between thp4r8 (y), at6e llgmuie w6,kze two wires are the contributions from the two wires the same?

  Four long parallel wiresqckmy w/fjo50bv+l ,. each carry 2.0 A in 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 tl/b kmfwjo5,qcv+. 0y he x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wiv bb.z5 avn) e8)u 8hq4xac8znres carry currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated b. v5 8 bxu8 aq4h8)nzbazev)cny 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field atvuc0yn soo5wx ms )/*- the center of a circular loop of wire of radius 4.0 cm when a current of 2./0o) s- vow*xn myus5c0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. l,xg97a 4 nju1lknc:u(4ebpg What magnetic field is produced at the center of the solenoi:ce4 uj1plb gl na(uk 749nx,gd when a current of 10 A flows?

  A solenoid with 500 tu 6x rix19lj(ys m3 ojxus nc,or36.pb+rns is 0.10 m long and carries a current of 4.0 A. What strength of magnet 6 ob1cyi,xusrsxx9j3mro+l6n(3p. j ic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cmhx6zod u)9s wf):fg6c-n:e 7fqvn4 dopxs3 n. long to generate a 1.0-T uxs3 x:)n 9. 7pqnho f-66w:)zn4vdds gcf feomagnetic field at the center?

  How many turns should l qr5ux2ezl 4c:/i;dz a 10-cm long solenoid have 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 rectangular loop of w32iz6cu( haw120 turns that carries 6.0 A if its dimensc ahu2w6zi3(w ions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unif+qdj 8vnz2g.p sl1gp1orm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the lovp18 .ng+sj1zdl q p2gop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectionalc6t-i vcgz+jc ) ))h:cpyl)d )gvcek; 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 p dsv(0av j7l4is in a magnetic field of 3.5 T. The loop has ( lspvdj40a7v 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 fieq8 ymq1ze:t8q ld of 0.30 T. The current in the loop is 2.0 A. What is the maqq8yet mz8:q1gnetic 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 fikb0ul ,-nnk,zkrgvxv5 f;8z6eld of 0.30 T. The current in the loop is 2.0 A. What is the magnetic to,l0u ;,x6vznkkb5 n8v grz -kfrque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area 07 o +k5:2 z*pcwu9 -bivo.fagxsejw e$0.25 \; m^{2}$ 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 speew-vrs1htj 0rnv ):kyc+ot*.bd of $1.0 \times 10^6 \; m/s$ 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 ion with v my))rv)oywney29gb e ccd. rb(,36jlelocity $6.9 \times 10^6 \; m/s$ 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 2n*lb4r opx8 gv:m ;7d1oxdjfof 1.0 kV and then moves into a magnetic field of8xx o d1n*g7 m pl;rvfo42jb:d 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters q ko bg(, h,9vfdlk 2yku(lug b9467dba magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the pathg4 y6k lgu(bq d u7v2d k9fkbh,b9(l,o it follows.

  A beam of electrons nknlu2a bk5* ,87f q eyfy3ck)is accelerated through a potential difference of 10 kV before entering a velocity selector. If the B-f)f3k,alnbqy7*k 5 f2c8ue kynield of the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?