If the north poles of two bar magnets are brought close to each other, the mag uf8/uvepiafj9fu: 3:nefe8f u3vi::uuapf 9j/ts will

  If the south pole of c+lz)q o;5pzf5y ckb9ie (j+kone bar magnet is brought near the north pole of a second bar mai ; p+k5f ojc5qb )z(l9kycez+gnet, the two magnets will

  If a bar magnet is divided intwjt1-dw wk 2ycew ro/i969h1so two equal pieces,

  The Earth's geographic Norbtf m iix2h).;jcq+-mth Pole is magnetically a

  The south pole of a magnet points toward the Earth': z. 2crup7dh gk);hlns

  An electric current producesipg)r9 7kz hk;/qffp .

  Which of the following is correctnxhi(7i(g j.uml 0ek iz.24 be?

  A vertical wire carries a current st n)9t5r( njcgnraight down. To the east of this wire, the magnetic field poinn(gcj) 59r tnnts

  A horizontal wire carries a current straight to; ot o24qanl+ke nb01zward you. From your point of view, the magnetic field caused by thisntb4; 1oe+qza 0 2lonk current

  A current carrying loop of wire lies flat on a table top.esu e4r-8p2 gz When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magneti 4ez8epu- 2rsgc field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop ofdvc-fm6 01 nuv.zgr; 2zew/ ln wire lies flat on a table top. When viewed from n v1;6nvce/r u.z 2zmwdl0-fgabove, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fielcw8t a0j w;:ghd is the

  1 T is equivalent to/5+sht f hu1s9kv ks4i

  The direction of the force on a current-carrying wmjypqvm 792 rao +h6k.ire in a magnetic field is described by 7mp+m yq v96r2.jhko awhich of the following?

  The force on a current-carrying wire in a magnetic field is the strongest we9ow a73: fakhfnb(.sh fg*h3hen

  The force on a current-carrying wire in a magnetic field i06i xdl)6l4 bw q;ubuxz,ll7 os equal to zero when

  A vertical wire carries a current straight up in a region where the ma6kt5fpqa.h igt 2yqi9lmqph :m d045+gnetic field vemqdh0y lf5 : qiit2+qh.atp4 9kmp65gctor points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic 72vmd9q :i7)hmdgequ 6v2 kzvforce. From this we can conclvg u6qmk 27v29 :heq)dzvm7id ude that

  A charged particle moves with a constant spe ;pw9,dzkx:ured through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the partizw :d9, uxrkp;cle moves

  A charged particle moves across a constant magnetic field. The magnetic 0izc9i vkpi +;force on this pi;picvkz09i+ article

  A charged particle is injected into a uniform magnee;tj sf;fg* r7- g.nxptic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, tf js;-x.* gg7rnef;pthe particle will

  A charged particle is observed traveling in a cf786b9nc iu y)e1 l85de vejjutp8r b mfl(i5/ircular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path woultue y9leb r5 )6i l7d8ifpfn5b8um1(c jv8e/jd be

  A particle carrying a charge of +e travels in a9:opm. sljtqrti1/pals 7 m5 5 circular path in a uniform magnetic field. If i5/lm7 pp1tlt.mji9s:sa oq5r nstead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron movek4 )qm:kcs1vis eastward at speed V in a uniform magnetic field that is directed straight sk1cqm: ik4) vdownward. The magnetic force that acts on it is

  An electron has an initiaz c eg*/d)cs8jl velocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic fi* cjc )z/8gsedeld is

  An electron moving along the +f/ma+* w 1iv,r3;4fx l tdfs)-wcytoax axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the i;o v-r tyd/,+wf4wa fst)fmaxl* 31cmagnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-car8c,xdj lls9 vo65o: btrying wire is

  At double the distance from a long curcbyhwg,,: .r qyx-q 7erent-carrying wire, the strength of the magnetic field produced by thatq.x-,by7qgrwyc e,h: wire decreases to

  Two long parallel wires placed side-by-stpwy0oa p/qt8d i:bnj -6ac13ide 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 exactly midway between the twd1a-y 8 t0j:ctpbao n6 wi/3qpo wires

  Two long parallel wires placed side-by-side on a horizontal table carrq (we6: uixck)y identical current straightuw(:qx 6 )ckie toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. p.;ol -t;c 6if8r96 jlqm/ camx)vug tThe magnitude of the force between the wir-;l; )plfg 86aqi.m jtc v69rctxu/ omes 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 wire carries current tm 8v0q,m ty3t7ctc7p )fte ba)oward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on the p877t, mtqfpcc t)bye )t30mav roton?

  A wire lying in the plane of the page carries a current toward the vji,fqk 9 .k.mbottom of the page. What is the direction of the magnetic fq, k .kf.imvj9orce 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 on a horizontal table. 1i pnv1q1d 7.uvvr7or If the wires carry current in the sam7r1 1nv7r pq1o.udivve direction,

  Two long parallel wires are placed side-byv5-9zp9r i vic-side on a horizontal table. If the wires ci-vz vc r9pi95arry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one sc (6.cd xxcoh xt5dfh 6gv-cu*gvp8(1trand of wire 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 hdx1*-tpxcoc5 u(x(g8c vgcvfdh.6 6 the larger loop is

  Consider two current-4( rrpoqgew: ;carrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radiuop:wr4g(q;e rs 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 ch .bo7r.; (nna 8xion+qzy3ts)d gg 9oarrying loop occurs when the angle between the loop's mast+h; .qgngon i.nx7b a3o(zdy9r 8)ognetic moment and the magnetic field vector is

  When placed askew in a mlmd1, uicz rg1q556jhagnetic field, a current carrying loop that is free to rotatelm 1ziuqjc,1gdh655r in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the oper2)f/ why6 9fbrzylb9 bation of essentially all electric motors? b9bfyf/yz6r bhw9 )2l

  A circular wire loop lies in a horizontal plane on a table andw+vsatbh4kg )nq.w+vt ;j.p + carries current in a counterclockwise direction whenwh s )qg .+wvp+vn+ b4tj.k;ta viewed from above. At this point, the Earth's magnetic 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 p f u+6fgh(a4vf;smut*w+n d ;uarticle of mass m and charge q is accelerated 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 gfu+smv4u;f d+n*hfau(w t6;an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector con+327jr(9ceur ru 9bhpt9cns l4psdm *sists of 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 followi2* mch3uedp9sr s( l+r97 bj 4unpr9tcng, disregard the magnitudes of the fields. In a velocity selector, the particles move 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 4.6/-yjsx;ib tm / 7nmbhhm pha current of 0.60 A is oriented parallel to a uniform magnetic field o6 .hmm bth y4sbph-i/ j/7xnm;f
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dire5z a(3i6b3o6gh zu y /uzl x(qh4,xfpiction 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 5.0 A when ij y9w- orod)o fu.v3*tih o+1yt is placed in a magnetic field of 0.020 T? The wire makes an angle v.ooy*9o3 dfo+)yirh1tjuw- 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 indr i3f6yq /8zdo1j4f k a magnetic field of 0.10 T. Whaji 1drq4fz8yf6k/o 3dt minimum 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 magnetic field of 0.20 T.1w.)ct vo9 dqef yj ;y vsf2msw/rk,5+aw,9et What is the magnitudwk cyy1swe2 9o,t f; , a.sr)q+fmedvvtj/w59e of the magnetic force on 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 szy3tk0d4sd*p ;hlw k,bqc + .qpeed 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 spe yrkl ie; (4x1;1tmttxed 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 nor;udd:b*uy j0ix(hi g)th 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 sp;pjss5 9q)n; ,,a naj u.9tgqmr* inufeed 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 wi ckhi(bk o9 /jvg6.4tgth 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 acceleration of the electron.

  A proton has a speed lf*4k 2 put+ tpbmv19mof $3.0 \times 10^6 \; m/s$ 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 curren *,v hjzlfudiag8s1e2ao q3hy(/ ,pm5 t of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m fdpaaofh3*s8, zu1j i2gvl(e 5 /my qh,rom the wire?

  A high power line carrying 1000 A generates what magnetic field at the gfvv0lidjp049 round, 10 m awaypjfd 4l9v0iv 0?

  How much current must flow for -gin hy/-2.hp bm ,.yy1czob;ovtiya 0y r69c $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wirid/e0)k r n yp2 pudh6r04/huue carrying a current of 5.0 A is the magnitude of the mahuudrunpiy 6 0k4/p0/ hr)2ed gnetic field due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wire/w i.r5 y9faxus carry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point thatxawryui5f.9/ is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry curr 9s9 g-7: 8xm1rziqkz;8px ,ogjkap .gorrre,ents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 rp8,g esx r9pzi7gmk j 8:,og.1 9-rz r;aokqxm. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direc3/ y s8(j noi1phjwcwqes41*gtions. The wires are separated by 0.20 m. At what point between the two wires are t(i ss8p ohy1/w*w 3qne41jcjghe contributions from the two wires the same?

  Four long parallel wires each carryw+)knlrow.y s.i c ;56may/eit.a*pf 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 the x-y plane. What magnetic field does one of thei*l.k)f5aarys./ n.wmey;tp w+6c i o wires experience due to the other wires?

  Two long parallel wires carry curgq2cfe w 83mn)rents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find cnf )28eg3mqwthe magnetic force per unit length between the two wires.

  What is the magnetic field at the center off)qca n.8e lsj9pxv0oa)0lk0 a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wir)l0sl8cv a0 j .xfne)a90op kqe?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fielo7:;b-aba vv+i b,x tud is produced at the center v bao:; ita7-,xbvu+bof the solenoid when a current of 10 A flows?

  A solenoid with 500 turnsx1xaj7ick4el 3ieb -1 sha6 aw7xkzf3q g(.+l is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at its center?g f.s(1xe 67j7lxaihw q 4+31lkaickb 3z xae-

  How much current must pass through a 400 turn coil/z. vn0j5 j subz i71p18zhfoq 4.0 cm long to generate a 1.0-T magbs1ivpzzf .huq07/jzn8 5 o1jnetic field at the center?

  How many turns should a 10-cm long solenoid abvbgpj wcf.;,1 e*b7have 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 120 turns gv4j 1:xf4z61a4 koo3ftvlqe that carries 6.0 A if its dimensions are 4.0 cm x v6114agtvq fj3zf: elo4 4ko x8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnca ijs1)ept4/r9;qf p etic field of 0.30 T. The current in the loop is 2.0 A. aj/ 4qei spf1c;rt 9)pWhat is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire o724ix2d tpeg lf 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 p93 sb*kvmrd: in a magnetic field of 3.5 T. The loop has an area k*:sm vd9b3p rof $0.12 \; m^{2}$ 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 tf sw723zl ac4of 0.30 T. The current in the loop is 2fl3724 zcstwa .0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire oq 4toihg,* v.crx rt5p*m+os/4l2edef radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loopg+,d tme4o* r*/5icp.lqet 24 voxhrs is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop o /sunvi 4-im+af area $0.25 \; m^{2}$ 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 x9g 3xj; j6ndzf 0civbfjr 5)elh7;/,vhi3nyof $1.0 \times 10^6 \; m/s$ 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 withx oar86n*lmi * 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 kV and then moves into a magnetic fi*,ia3 tgykojo-xuc)q9 y1f6;d lp) ow eld of 0.040 T. What is the radius of the proton's resultinig wkx ;)3uoqly 9o,d oay6-p1)ctj*f g orbit?

  A proton is accelerated from rest t4-a yree lp)2zhrough 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine tz2 lyepr)4-aehe radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV befog, y(+uar cvim1 hzy;:re entering a velocity selector. If the B-field of the vhg y+:z ,yc;i 1ru(mavelocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?