If the north poles of two bar m:cbg ,x idvby/kdkus *8w;s 79;m6nsuec*eh 8agnets are brought close to each other, the magne:h 6bds*bek 7s,v; nu ;gc x/ us8*e9iw8mydckts will

  If the south pole of one bar magnet is brought near sqdqdek)gy*p s;u +54y(gsd 5the north pole of a second bar kd)(*5pdu qy54qgys +sgesd ;magnet, the two magnets will

  If a bar magnet is divie/q36 h g5s0rgc9b odided into two equal pieces,

  The Earth's geographic North Pole hhls+ l ;y4;i/j7-hm gxgezw 1is magnetically a

  The south pole of a magnet points towf 8d l52ur idp8jma ygu3 vj3:7wzx,6zard the Earth's

  An electric current produce,ns;qq;1o nrjrs /l p9s

  Which of the following i 9tz-*oin,fsks correct?

  A vertical wire carrie/xz mmk-v of5*s a current straight down. To the east of this wire, the magnetic fieldmkvxz -f /5*om points

  A horizontal wire carries a curren zjh6 i:/yc-+nuawmv2t straight toward you. From your point of view, the magnetic fi+imwyja uc2h-v/:6zn eld caused by this current

  A current carrying loop of wire lies flat on a table top. When vn7tj10 vg)th viewed from above, the current moves around the loop in a counterclockwise sense. What is) vg0v7tnj1 th the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop qdqscw71w7l3 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 dd71q clww7 s3qirection of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is then 4r xi-t.duu y8ug1 os,8z9zrjr)gn0

  1 T is equivalent to 2j-af oc:m(ua6f6f ea

  The direction of the force on a current-carrying wire in a magnetiigr;l m72 ij0h9*fjfqn-qs;l c field is described by which of tf fi7hgjs;ir ll0 *9nj-2 ;qmqhe following?

  The force on a current-carrying wire in a magnetic field isujd3kn,iannv( vq7;ya 2 *m0* vl xc1f the strongest when

  The force on a current-cariv kuq985+gaawc 96;qjpa cn 6rying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region whlv0)0 xlm okp3ere the magnetic field vector points due north. What is the direction of the resulting force on this curvk3)pmx0l 0 lorent?

  A charged particle moves and ext2c, j+r,;xfjb)4j i2fswvxhrh.z : y periences no magnetic force. From this we can conclude thyx2+,h; wsf2 ,4v) f.jzrih:cbjrjtx at

  A charged particle moves with a constant speed through a region wh h /uagg,g2do,ere a uniform magnetic field is prese/2gud ,,o hggant. If the 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 fib uex8sc ;nh*8eld. The magnetic force on this particle 8n*u;x hcbe8s

  A charged particle is injected into a uniform magnetic field -)-d2gg5 vsoeu ypmw*such that its velocity vector is perpend)-veoysm* w -g5g 2pudicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in ,))d ysnn1 o9vgg f7mvf ew0x;a circular path in a uniform magnetic field. swvf) 9ym 7 f,nx)n;o1ggevd0 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 circular path in a uniformpyu4f;*ic xa0.6 ww3fkdwo f- magnetic field. If instead the particle carried a charge of +2e, the 3f.4fi wf6-uw;*pw ax o0dck yradius of the circular path would have been

  At a particular instant, an electron moves eastward at spego 6e 2zvr,2gane33cx 7xw)wid ;lr8q ed V in a uniform magnetic field that is directed stg 3xqv ;78x gn 2o3w,zrerd6)e2lwaicraight downward. The magnetic force that acts on it is

  An electron has an initgof .( ( sxfvqhpj,0t0ial velocity to the south but is observed to curve upward as the result of a magnetic field. The direction of thef x pgq(v0(o,jt.fs0h magnetic field is

  An electron moving along the +x axif1vihe2 9 kww;s ;nts6s enters a region where there is a uniform magnetic field in the +y directiwefs2w 9it n ksv61;;hon. What is the direction 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 s:v s ivlaa:s3mb7 1)d4bkx s:jtraight current-carrying wire is

  At double the distance from a long current-carryinglu v x:v nr9wne.3i,(g wire, the strength of the magnetic field produced by that wire decreasesnnl u, g :wvx(9er.v3i to

  Two long parallel wires placed side-by-side on a horizontal table 3(kd(f) mrsrr 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 fiekrrrs 3dm()(fld at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on -i6 wzgy y:-yw;/os hv0)sa* sv.ptln a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the two wira-6z) .yywi go s:/shws0l;v*-vtnpyes

  Two long parallel wires carry equal currents. The magnitude of the fotk8q)eza6c d yu-h70vrce between the wires is F. The current in each wire is now doubled. What is the magnitude of the new ) k 7dyuz h-8avcqe6t0force between the two wires?

  A long straight wire cam(ght gf,0 +pikg g;(yrries current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the foy+ m0,pkt;i((gh fgg grce on the proton?

  A wire lying in the plane of the page oca 3 q(0+wiysezg b(/carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularlzq +go0yc s((ai we/b3y toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed sidw s8d01 1wg(fl il5taee-by-side on a horizontal table. If the wires carry curra( e i5lgldtw018 fw1sent in the same direction,

  Two long parallel wires are p)wj*)lal9 p, *d8 /fo qbwsithlaced side-by-side on a horizontal table. If the wires carry current in opposite directios b9ol,8fl/*a*hd p )jtqwi)wns,

  Consider two current-carrying circular loops. Both are made fl4nsvnx 26 aq,rom one strand of wire and bos4lan6q vn2, xth 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 currenth,ph1ogsjw6;9r1o2v c4qb qfr w/u4 m-carrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twfc6;j 1r/m2 ,ohgvqw9 s qh4wrbpo4u1ice 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 between tgj-aw *;p5eo sn3 wag1he loop's magnetic jw os-gn a;*ae31 w5pgmoment and the magnetic field vector is

  When placed askew in a magnetic fiev zr bqx1 kp*(s6j f3/wbzg,88d(obygld, a current carrying loop that is free to rotate in any direction will expe sz8ov ypzg b/81dxjq(36*,bwrg (fkbrience a torque until its magnetic moment vector

  What fundamental fact underlies x7 j kzsep/ce5:s;h:)5 mkrsc the operation of essentially all electric motors?c r7e)x k;h:5s jskz:pcesm5 /

  A circular wire loop lies in a horizontal plane on a tabzv;v caq8 (-xqv*zpwc1t,m(ug* +tqwle 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. Which side of the coil tends to liftz p;,u(a*vg( +*qzcwqq81 w v m-xttcv 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 through ,z- n ksx9x*m)xlg,nza 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. n-,z*m,s 9)nkgxl x zxDerive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a chargiv*njnvmtu:9 urb qxs*- m:-)ed particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles-v b:sm*x -ituq9)nrun*v:mj 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 point?

  A 2.0-m wire carrying a current of 0.60 A is orientedm(sd g.6tb8q e parallel to a uniform magnetic fe(sq8.mt 6d bgield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curre8kj-oz-n+ h(ubvd( p s+akv4b nt of 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 straight wire carrying 5.05t/k ef,6xm z xw7 j/tnfc-7qj A when it is placed in a magnetic field of 0.020 T? wtj /fjfx,c-7 xeq k56n/7mzt 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 a n3*0 hyzfaqvs*qq a+qc q7,hcv1*3hmagnetic field of 0.1h+qcv azf*h syc q7n33,q*vhqa0*1a q0 T. What 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 xdhh(i/ qt9 kh0b/-otfield of 0.20 T. What is the magnitude of ththhh-oqxb0/(k9 i dt/ e 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 zo..olf) gps9a 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 speex+ m. bhgdwy2*d 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 no/j.c eesobd, c s v2h*5.1aouerth 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 sdwz hbnnt63oad un)uw;p)),io a /u27peed 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 speyp- 7qql0djc;l d/fx0ed 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 ov4+nk k7fbcljj/fk*y.y * yb 5f $3.0 \times 10^6 \; m/s$ 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 carriedv ebt-s 5 21kt4kdzf) bum93os a current of 25 A. What is the magnitude of the magnetic field a zb4) d3voekd1fmt 5ukb92ts-t a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic f na/(0ymn0,e0jx; 8irl+szoi dc r 8tlield at the ground, 10 m awae 8xadilmr8i c,n0(+rzs0 /j on0 tl;yy?

  How much current must floz y+o jey prh6j;x03xd *2+ wkp g.qj8e7d4xfww 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 wirq5eaeef*0 h 3h gq8g5se carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic5 8se0ghf3qh* gq5ee a field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite ,8 j s1fid ; 1oeqlozb(rlv))rdirections. They are separated by 40 cm. What is the magnetic field in thleqr) 8lvor)i( , 11zobs;d fje 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 cxi b5(dek*:dlurrents 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 te:blkixd(d5 *wo wires?

  Two long parallel wires carry currents of ,tqsey)i7qby 9 n/v 3z20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point benb ,zsqte/q9y7v)iy 3 tween the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direct 1l(,sr)c zrwz7woqehf.-le)ion. They are parallel to the z-axis, and they pass through the corners of a square of siqws,elrz(f .le 1 )o h-w7crz)de 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 carry currents of 5.0 A andizjalx/k :c6,q9 hbd4 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find ckdi /jq b,6h9: xzal4the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire oohgi .b+3u8u eoq ,pvl5ui7f+ f radius 4.0 cm when a g+ 5uv7b8epiu o,qoul+fih3. current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fieltmdxp:o* *g/l;tkk u9:oh ) 2p1z gihzd is produced at the center of the solenoid when a current of 10 A fugzlpo1th)g;kt* o*mi:x /ph 2:k 9dz lows?

  A solenoid with 500 turns is 0.10 m long and cof qtnzsz/ u9sza)u. 3i5oq58arries a current of 4.0 A. What strength of magnetic field will it have sn9f zqat8o)5i/uzoq 3.u5zs at its center?

  How much current must pas))4xv xc a2dcexl2kgl7 0c-hss through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the centelsc)c2kx4 a )xhlxc27ev -0 dgr?

  How many turns should a 10-cm long solenoid have if imlm9 4p,m l)/ipzaax5 t 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 that carries 6.0o gg /pj )6,mfc,it0ygc.7zmq A if gf,myqgg 0m7ct )oj.,p/i6 cz its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform maghlq*qlq06-+ patdt ii s-ux9( netic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loot0dp (ah*9-q siqlu ilqx+-6tp is perpendicular to the magnetic field?

  A circular loop of wire ofs0m;;mq xz- c m3m1szye79s rf 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 currejlhppji.3p8c ;c 9s+bnt of 2.0 A is in a magnetic field of 3.5 T. The loop hphc c3 jl8;p9jb.p+ isas 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 wir 1gytqhu o)4c1e of radius 0.50 m is in a uniform magnetic field of 0.30 T. 4y1ouqc)gt1h The current in 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 9, fdit c5:c3tn+eaa gmagnetic field of 0.30 T. The current in the loon3 ,agt9 5d:cteacf+ip 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 ar86f h)ts y ih2b9hysf0ea $0.25 \; m^{2}$ 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 par8nbd yrtpc 10 h;hh+r+ticle (charge e) 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 with vfumqh3 z175s l) v/9uprpdy2i elocity $6.9 \times 10^6 \; m/s$ 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 int9:c p*f slu0fho: 4ostp-jw p5o a magnetic field of 0.040 T. What isup:5p4 * sjcool0twhf:-9 pfs the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 )4 qpu8 zsz/.kfaw31glz1ojmV. It enters a magnetic field of 0.30 T oriented perpendicular to its direction8jza 1)p mzsz 4 3.oufqwk/1gl of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV befosf)rw.cuxuo6j :l4, 6kbop / ix)ifh;re 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 particles are to be undeflect6x ;kpi/fhu6bu .: ,)4loowirjx) sfc ed?