If the north poles of two bar magnets are brought c ) pb/rf tn).fklxb*,mlose to each other, the magnets.,l) *xmfn/bkrb) t fp will

  If the south pole of one bar magnet is brought near the nor*o+eot s6wm3av; *xg rth pole of a second bar magnetgs3tv*;wx +oe6a*o mr, the two magnets will

  If a bar magnet is dividedcsmfc6 h w4s;vpn;5f+nx *x+q into two equal pieces,

  The Earth's geographic North Pole is mags 3iw2/de g9)-3 pf0ruiw0xhkmh8qh xnetically a

  The south pole of a magnet points toward the Earth15 pb.ojfvr1l k(y4f t's

  An electric current prkozbj*6ig:bo; /l iw .oduces

  Which of the following is0fd2ia,.iiho8j fppy7;df c e6k1lf/ correct?

  A vertical wire carries a currlhnedqby/l, mid-xbgj 9 hm,+-i 298 gent straight down. To the east of this wire, the magneticbi ,8dh+en9-im d,2 lj/hx-q9 gylmgb field points

  A horizontal wire carries a jbfdd+7pf w+ m: k(m7dcurrent straight toward you. From your point of view, the magnetic field caus+b:pw j mddmd(ff k7+7ed by this current

  A current carrying loop of wire lies flat on a table ibjh-; ),s k,5hwn kmb(s8pw dtop. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the mdk;8b5(s,)w j bhms nhiw k-p,agnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circjj 7i/3plr3 czular loop 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 direction of the magnetic field caused by this cur/337jz jcpil rrent, inside the loop? The magnetic field

  The SI unit of magnetic sce :hfd)*n2mk4 vc-krdbr 8 7field is the

  1 T is equivalent to 8-7c 0wmhualbrgb 3mhj; a+1f bby)5j

  The direction of the force olt k,w*0*ozr,y dn.o.ti3iv y n a current-carrying wire in a magnetic field is described by which of the following?yywt zdvo,*lkn*r,o 3. t0 .ii

  The force on a current-carrying wire in a magnetic field iso;ow1is -)nmvak,w)bx9l+vd the strongest when

  The force on a current-carryinhr:kf ;it,ro68f 8)uhc+n5d2t annkq2 br s5r g wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magnetice6i ln6 tkd84b field vector points due north. What is the directionti8dke 64b6 ln of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we can cb*pgse x7b 5.donclude thap bd75.e bgs*xt

  A charged particle moves/i:vj s rv1ed5;rzr j df9w+:z with a constant speed through a region where a uniform magnetic field is present. If fi+; ::v 1wrvszjrd/d je 5z9rthe magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic forceux)urvn, wprr0d7m*5.8 vs l g on this partiuns 7*lvx 5rvr 0dr, mwpg)u8.cle

  A charged particle is injected into a unw5q tp0z/y9 ; oav u:bsl+wy-piform magnetic field such that its velocity 0bpu sqoz+w yt ;a95-lp :vw/yvector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle iskxm-o a;l*9hk1iim : j observed traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path wom;ji *:l- ohim9kxk1a uld be

  A particle carrying a charge of +e tr0txa3 hnn)c.savels in a circular path in a uniform magnetic field. If instead the paxn0 hnt.c sa)3rticle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, a atnim-ic.)/hkyy, i0 z1)*od6po l ovn electron moves eastward at speed V in a uniform magnetic field that is directed sti,.im -oz)v) ic h t0*a61dlonp/oyy kraight downward. The magnetic force that acts on it is

  An electron has an initial:bvv vdbg :747bjd;ca velocity to the south but is observed to curve upward as the resul a4bdv;7bc vjd bg:7:vt of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there ef d),b(m0sjl is a uniform magnetic field in the +y direction. What is the directbjel,)ds (mf0 ion 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 current-carrying wirelp8 g*62pr+)zv9 m) f wtaku+6vdfjtv is

  At double the distance from a long current-carrying lm1so65*le+p :p kwj.wxah o. wire, the strength of the magnetic field produced by that wire decrease*ooe p :hp xw5l+js .kw6mla1.s to

  Two long parallel wires placed side-by-side ona6/rlp6d sukg tf6u65 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 yoau666kgp /r sl5f6d utur point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires plaepv 3i(;puk eky/tyt*) k6m.+;wpmr vced side-by-side on a horizontal table carry identical current straight toward you. From your point of v+ey ep*3k).ktv6p (rt;kum/;v iw pmy iew, the magnetic field at the point exactly between the two wires

  Two long parallel wirddhr *,5g lk0xw,x;y6l8hqvm 2 ,ailhes carry equal currents. The magnitude of the force between the wires is F. The current in each wire is noxl , hkv;,g l dyqhdl*im2056rhx8w, aw doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves toward th8 3fx --88 nrit;ut-u s-drs:1szyrf myaezv -e east alongside and just south of the wire. What is 8f r-i u-yesvtx f-3dnau-8zs1:s-8t r rz y;mthe direction of the force on the proton?

  A wire lying in the plane ofjas-- *5zlf rs the page carries a current toward the bottom of the page. What is the direction of the magnetic force it plsj-* a f-szr5roduces 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 tab k( klr2mpie)ie2j1)qle. If the wires carry current in the same dir(22qplerii e)1j km)kection,

  Two long parallel wires hmly j+*cggmw, 9p h,i -3ca(/vo nb/zare placed side-by-side on a horizontal table. If the wires carrng, hgbymv9amp(/ oh/+,ccziw 3 l* -jy current in opposite directions,

  Consider two current-carrf2n)(iwbj 1jwl6u h w2ying 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. Compare(2 l6)ubnjw2hf ijww1d 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 circular loops. je4m( y4q i:d;u3 yb:nllxs6 m;nlv 3j 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 momes:ndyj:jmyv;b 4xl3n 3q;(6luie4ml nt of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrtdx0d0(ubzp v58; w 9 mmi62nf w)oezxying loop occurs when the angle between the loop's magnetic moment and the magnetic field vecto0u(98)f dzix 5 mo pxmden06tww2z;bvr is

  When placed askew in a magnetic field, a current carrying loop that is free totxn3df .5 0let :e5lyr rotate in any direction will experience a tdy 0ne5llr3 ex.f t5:torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all**39 8n tzib vkg2jdenpb) w:z electric motors?)evw n bk8bz dgn39tpjz2i: **

  A circular wire loop lies in a horizontal plane on a table and carries cp-8g 9td.4yhxu.u j owvc uj.xfku(;1urrent 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. Which side of the u- d uctfj8.j4yxpk.x;(.1h gu 9ouvwcoil tends to lift off of the table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer au 8mf7von:)sm2ujnf0 particle 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. Derif 7mvnsuj m0n): ufo82ve an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector z*d9azv de5,y w f:y5qconsists 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 following, 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 po weaqdz5y: d*5,yvfz9int?

  A 2.0-m wire carrying a current of 0nzl6 vhn4s (-.(mwmb n.60 A is oriented parallel to a uniform magnetic fieldmznlhsn b- m v(nw46(. of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A ird ow4f xvaq gyib ;b)4bk/2 o(ca;7a-n 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 straight wire carrying 5.0 9.+toh ddt*dm A when it is placed in a magnetic field of 0.020 T? The wire makes an angmt* t9h dd+od.le of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m bkied4-5y(o f long has a mass 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 magn4k5- ye(fbdioetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the magnng-p2 q uv.h*aitude of the magnetic force on taqn v2h*. upg-he 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 sp5z g3jxjuujm 6l3*dd )ht::geeed 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 sp acp2i()kj;woyq.) aae o5 uu6eed 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 with spei;2w:hrw;6 pu; k54s3h goorjk.y xqced $4.0 \times 10^5 \; m/s$ 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 *bv esx4fl8ckh8 w8o6of $8.0 \times 10^6 \; m/s$ 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 p4 / j)cll*dyo(w,z ktof $8.0 \times 10^6 \; m/s$ 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 speeducero5hg.3 t . 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 l *cryjq( w7kt te:k*f+7 uv)jthe magnitude of the magnetic field at a distance of 0.15 m from the wire?cul)y 7e :*tt*+ 7kqjfvrwj(k

  A high power line carrying 10:jzs5sjzqvp7x;2- bh (qeuvt4r *hx ngl k+8/ 00 A generates what magnetic field at the ground, 10 m (gh/n jr28zb uj7-sx+vzpl:khxt4*e5;sqq v away?

  How much current must f u2lk fan5721r5obuehlow 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 wif .f : nvbvhd1lkll)s03fk1v1re carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strelkl sflvnf) bkf011hv3.:1 dvngth of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A +k bv4jo53nbe b0x2po in opposite directions. They are separated by 40 cm. What is the 52o0ojn3bk xbve +b4pmagnetic field in the 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 a eddxyk0.4fw6nd 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magn k06d.yx fwed4etic field midway between the two wires?

  Two long parallel wires carry currnzy9lzpb1 9e7ents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires a7yl1pz9zn be9re the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. Theu8dgah .h8c3by c4b- rs/ln)py 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 mabp arb dg) 48u3h-y/cc.s8nlhgnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents xeyj x,x(4 is/6d er(mof 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between ti d4(jm /,r6xxx sey(ehe two wires.

  What is the magnetic fies53(ic:f elsw v :jnvd1c 8j3;eodqs 4*s* anpld at the center of a circular loop of wire of radius 4.0 cm when a current of 2.3 p*c:d v:ns dsa8e ewnjijvcsf431os5(*;lq0 A flows in the wire?

  A solenoid 20 cm long 7cuxrea111fzx 6pv6c b2qjr1e3v9jb is wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of f616jjv 7cvx ezc1ra31qbpur2xe 1 9 b10 A flows?

  A solenoid with 500 turns is 0.10 m long and carrzn 7y+2lz4e,d+8dxachdg +jkj tz9 4o iekp;1ies a current of 4.0 A. What strength of magnetic field will it have a 9opck +1a++z4jh e,ddzj 2xd87;lyez nk4igtt its center?

  How much current must pass through uh;oeg qa/no4 9hhw02 a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the 2nhh;oeqaowg9 4h u/ 0center?

  How many turns should a 10-cm long solenoid have if it is to gs fpju+g34c:)g szqb3enerate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment 3si6 )fulc hyeu:;y/owtr, 3cof a rectangular loop of 120 turns that carries 6.0 A if its dimensioi)l36/ chr u: ycey;tsf wuo3,ns are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 alzwd o 7*/- ec)bx5b3 z0b(kuwz9lgyT. The current in the loop is 2.0 A. What is the magnetic torquwc gal3 b7u9ebz*b 0 y-z5(lod /zw)xke when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cw6wkro jm;7 /ng05unrw sd 79kross-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 flni5p5/k 20 jv/ qushzield of 3.5 T. The loop has an area oipz0 ks 5vhnl //u25jqf $0.12 \; m^{2}$ 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 w3s 6 dcf x7+(fenxxu;nire of radius 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 wncn udsf7(x;+fe3 xx6hen the plane of the loop is parallel to the magnetic field?

  A circular loop of wireamjg qhox ,699 of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current inho j969mxa,qg 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 wire loop of areaay5/oor dj;ox1i:jw .5aemk , $0.25 \; m^{2}$ 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 w1;o(ypnnmky 4o(:ru yyf2 0ya 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/db*ei+-.pp ,cmz fvcq i a49p 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 kV and then moves into a magnetiu*fpl/ssv0o1fr*h w)v )6mc em yxl4(c field of 0.040 T. What is the radius of the pme )um0y /f*voxl)vhs*1frpl64cs( wroton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field o3.vre:exoz- c3 axggw) e2bd +f 0.30 T oriented perpendicular dg3 x+c2.:ee-rbo a)x wvgze3to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated -h:ncig +xqtx8yv /m 2cc )6txthrough a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a valucc:8ntm/x ) 6-x+igyqh xtvc2e of 0.010 T, what value of the E-field is required if the particles are to be undeflected?