If the north poles of two b*rzz y)pj8;:2+dywv iq3sggzar magnets are brought close to each other, the magnets3;rwjz v)y+ *ypqz8z2dg :ig s will

  If the south pole of one bar magnet is brough9 *vhr tm3fwv7t near the north pole of a second bar magnet, the two magn thfmr3*9vw7 vets will

  If a bar magnet is divided into two equal x( aal7 l7basc/+ahc4 pieces,

  The Earth's geographic North Pole is maqy .ag5(+yc3 mwinfx4 gnetically a

  The south pole of a magnet points to )z*rlw m(+lxqward the Earth's

  An electric current producespq jk fm00z2d+

  Which of the following is correb2dh-4atv4 q .kqej 0n 2j,swr7b;pg vct?

  A vertical wire carrrmqh/bz* b.qcp 0n f.5ies a current straight down. To the east of this wire, the magnetic field point0z.f r*pbqh5 mn /cqb.s

  A horizontal wire carries a curreh1o2h4getrvrt s* y *gx)5/bmnt straight toward you. From your point of view, the magnetic field caut)gy4hx1to*5* rvh /e smb2rgsed by this current

  A current carrying loop of wire lies flat on a table top. When viewzh0xwd( xx (:ded from above, the current moves ad:z0 (xw(xxhdround the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When vieweo7jpivg jj3 y+ :mlyw2x m(n/9d from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by thislyjjvm7/n pwgo (23 :+iyjxm 9 current, inside the loop? The magnetic field

  The SI unit of magnetic yw:.u()7jr xmk y( gbzfield is the

  1 T is equivalent to jkoth .9gnix2,/t a.e

  The direction of the force on a current-carrying wire in a magnevm twe nj +f5*3vu5io7tic field is described +je m3v5t*v5fo wu7n iby which of the following?

  The force on a current-i tzg 5fhh: 2ch,eie)od,y63qcarrying wire in a magnetic field is the strongest when

  The force on a current-carrqohl 3 fw35b*eying wire in a magnetic field is equal to zero when

  A vertical wire carries a curr cq/pjz+kgz4mk+- ik7 ent straight up in a region where the magnetic field vector points duik/+kjqm ck47 zz+p- ge north. What is the direction of the resulting force on this current?

  A charged particle moves and e(e jr7t nof0z+- jwd;cxperiences no magnetic force. From this we can conclude that r-oecnf;+wtjj7z (0d

  A charged particle moves with a constant speed through a region where a9eus nyz1il 8p u;;8g+a vlz;g dgc2q1 uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle w+e1gz gvquy;pl u88 cs1la;2i d9zn; gill be maximum when the particle moves

  A charged particle moves acrossv pq/a6cokoqi+ *g40c a constant magnetic field. The magnetic force on this part i+/oc0q*a cqvg 64kpoicle

  A charged particle is injected into a unifo921undtqs x xk7yg81ge h dn--rm magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's we-y snu 9xd1kqx2gt 8- hn17degight, the particle will

  A charged particle is observed traveling in a circular path in1h2eu u-:h64ydku dvabf *23ap0j kva a uniform magnetic field. If the particle had been travelivd 1*6e u 43k ub:h0-jka22h davfuypang twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travexis:afhox. ); 3ewe o;ls in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius s we)3aoox :ifh x.;e;of the circular path would have been

  At a particular instant, an electron moves eastward zhalp2ng14 g9e17p e(kj3 qa vat speed V in a uniform magnetic field that is directed stran (g qavepkhaz4l2 pj319 e1g7ight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwar3b isdy- bn,/nd as the result of a magnetic field. The direction of the magnetic-y/nsb3id ,b n field is

  An electron moving along the +x axis enters a sjh k:xsls2(*region where there is a uniform magnetic field in the +y direction. What is the dir *sl k2jh:ssx(ection of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight curren x9ht +h:*w:f0px kox/pl-pvct-carrying wire is

  At double the distance from a long current-carrying wire, the strength of tdi 8w, 9nsaw1whe magnetic field produced by wnia8w1,ds 9w that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal ta;h -gj tzb.b5able carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on ; h5z.g-batbjyour left carries current away from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-sixon x1bo9dg /(de on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between thx/n1 xo(ogb d9e two wires

  Two long parallel wires carr8 5)llb2 ;ddlc+ sjoily equal currents. The magnitude of the force between the wires is F. The currentd8lb 2os);llci+5dj l in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries currenveq689y otpi.t toward the east. A proton moves toward the east alongside and just south of the wire.6ie9tqy8 p .ov What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a cu g1;n*k//rzyleh o:c urrent toward the bottom of the 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 righuy;oh: /ng*e1/k l rczt?

  Two long parallel wires are placfaj-61 n-qy wzhhvy6*ed side-by-side on a horizontal table. If the wires carrj qv-fw1a-y yh zh66n*y current in the same direction,

  Two long parallel wires are placed side-by-si9 gaa),eo9kxl de on a horizontal table. If the wires carry g ako,ea9l)9x current in opposite directions,

  Consider two current-carrying circular loops. Both are mad izbl-9cxz2i; s vw+/te from one strand 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-sw + v9/cixbtzi2 z;l smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made froxzg tza(rhu26-h l-c;m one strand of wire and both carry the same cuzg-thl;c urax h6-(z2rrent, but one has twice the radius 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 occurs when the angle b r:vhuy2eh99wahv w tqkx-;6( etween the loop's magnetic moment and ttyuehwhrv 9 (a6x2 h9-wv k;q:he magnetic field vector is

  When placed askew in a magnea.; - gjznjp*ttic field, a current carrying loop that is free to rotate in any direction will experience a torque until tap;gj.-zn * jits magnetic moment vector

  What fundamental fact underlies the oper1z fm,ti/,fmb rpm8 :zation of essentially all electric motors?tp,irm18mz b,/ zm ff:

  A circular wire loop lies in a horizontal plane on.lh;ufxu)ch8hz(l3lwkhb 75 a table and carries current in a counterclocl u;wh f)h5b3k.lux( hc8lzh7kwise direction when 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 particle of mass m and chav2uw l. /acou6rge q is accelerated through a potential difference V and allowed to enter a magnetic fie6uva2wuol/c . ld 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 of a chargepl) h r;a0b1+p7tun)vm 7,epf xt+a bbd 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 paxfup+v )+n a bpa7 p1tbbtm7r;)e,0 lhrticles 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 a current of 0.60 A is oriented parallel to 0pyftndj.j /(a(j nv* a uniform magneyantpnjd.fj j(( /0*v tic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A iz 9j- 2wu e3j3rgyik3l0/ospgn 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 zyivx/ -1y24dpb vu k) n54ir:ydg/kva straight wire carrying 5.0 A when it is placed i d4rv x1p2uv4vkb dk-/ iz5ygy :/)ynin a magnetic 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 ma270km cbjdl) ; fnru *lhl.t00l r+qovss of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of thb70 fch20 0*n ull)l qv mrt.jrl+dko;e rod?

  A stationary proton is i-jz0afb.:, 4p;yr us f lsw5dpn a uniform magnetic field of 0.20 T. What is the magnis 0w,zu.: frbsfa4- dj5ypp ;ltude 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 wi/2q(o.jb lubyvly q*. th 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 ad.xb yya .5ax5:u, 8 famvn)yw speed 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 north ws) j8 oicqtw4/ v8-1 m2bg:aqxmfc4l jith 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 spefp.)ng)vn*,v lt/wv g jbf 9i.ed 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 wit5y (e y4gpvh-rh 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 of a* xmum:pl 83:pwuswvgf6)v+ $3.0 \times 10^6 \; m/s$ 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 d))5ao) pow p4sxfh 2gim(jl:. What is the magnitude of the magnetic field at a distance of 0.15 m from the a sofghm()):lox )pw42i5dpj wire?

  A high power line carrying 1000 A generates what magnetic field at the groundqerd; 1.fcz,0 f7iwdh4*vs r a, 10 m awayrc*r17zvwf0 i dqd. ha4 sf,e;?

  How much current must flm -yy- q.joarg c+b+:jow 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 current of *z wz8es,,vp a .2( p sxbfpcc*aj0a+k5.0 A is the magnitude of the magnetic field due to the wire equa+p8scjvpsfbz2,xe zp* (k, . 0ac*a wal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry cut,3gdn n.qg xnx)58norrents 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 that is 20 cm from one wire and 60 o n3g.n t)nx8nq,x5d gcm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposi u-3 sz3qll6hete directions. The wires are separated by 0.20 m. What is the magnetic field midway bhl-u sq3z63eletween the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposit9,mifgbg05m nks :bbs p::n7 be directions. The wires are separated by 0.20 m. At what point 7kp i0nbggm9n :s5: smb,:b fbbetween the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the saaxtk3ur/euhtded-27f1 km nk4q *h :)me direction. They are parallel to the z-axis, and they pass through the cornek :h1t hx7 madf3ue4r*q)n 2u-tkdk/ers 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?

  Two long parallel wires t ,an*xb6; ge82..ir gmkm choab1p1ep*bs4tcarry currents of 5.0 A and 8.0 A in the opposite direction. The wires areg1acbx imh tg.1o;8*2.a*p e pn, sr4 6etmbkb separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of radiush ;*:f)7 yjqa wyeb.fm 4.0 cm whe ejhwa bfym7y);.f *:qn a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 tu h3bvwvvbl.l(c u/p) 7hjh04prns of wire. What magnetic field is produced at the cen0vpv j3p7bb/c. w h(l)h4hulvter of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 lb8oo)pw dn .6rh3n)o ,/sf) qej zav,m long and carries a current of 4.0 A. What strength of magnet,v) lp6o8fs3 , ))oj a zwbrod.nqn/ehic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to grfe.m nv61:g +e*pethenerate a 1.0-T magnetic fitn1 *:pv rm.g efeh+6eeld at the center?

  How many turns should a 10-cm long solenoid have if it is thseep//f oclrl7d :et37. -xk o 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:seduh3j5y9ks,l x5 n that carries 6.0 A if itssknheyulx5:sj3 ,5d9 dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magne rnt 58(u y26nz5ebnbwtic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when5nnt8ubnbr2 e5 zwy6( the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crd ; n zqn,s-j9fr1v3dfoss-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 magnet eh+ n/(2bgtrwic field of 3.5 T. The loop has an area of th2ng(r b+/we$0.12 \; m^{2}$ 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 p9s80( lw4e+,x anhcdd:h yvs0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the9lnsx,4 he pw:acd 0 hs(8dyv+ plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radiusraj2v +:a lx7d 0.50 m is in a uniform 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 loop is parallel t7 :laxavrd2j+ o the magnetic field?

  A circular wire loop of a) b9z lm.knj6drea $0.25 \; m^{2}$ 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) u8,0um7u7gk)s iijfdt) i xt3 has a speed 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 w ws0go( h1hxx,ith 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 througc,./p 1*xpz nveacq s+h a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the ra1epps c,*+.c/ax qnz vdius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It ennn-ud(j7uo u t5.(tlbxp1d+z ters a magnetic field of 0.30 T ((bn luu.p 751dt xtn+j-duzooriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV beforol7 f:n h- dka*c/do9we entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is required if the partic-fw o* 7ac9o/dnlhkd:les are to be undeflected?