If the north poles o:j t*v5t0d+ rlclag:t f two bar magnets are brought close to each other, the magnett rtcad: +lj05 v:tg*ls will

  If the south pole of one bar magnet is brought near the north pole of a swq 2s9kf95wvi econd bar magnewvfki 95s29qw t, the two magnets will

  If a bar magnet is divided into two equal pieces -tji+h,b*cv2,c:;dq.lnnj ixsi 4cb ,

  The Earth's geographic North Pole is magnetically ) o* ip, 7x(lo11toj+si ck,ith6ge vwa

  The south pole of a magnet.+olm*hpuhv pg-gmde8 ,-0do points toward the Earth's

  An electric current :po1l pdkf/3* qjlgv/produces

  Which of the followin-vfa 6ef ehet2;c,:e)l h vpz)g is correct?

  A vertical wire carries a current straight down. To hy2n0/4y ehdw /9corjthe east of this wire, the magneticwo9ehy0rn2jyc/4/ d h field points

  A horizontal wire carries a current straight todxj5ur) pqx,8imv)n/,:x mny ward you. From your point of view, the magnetic fieldxmipm) 5)/uqxrdn,,xv8jy : n caused by this current

  A current carrying loop of wire lies fhfa5f*zlp-f )ve0l f*lat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is t)v*zpf *f 5 -fafehl0lhe direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular g ,56styp9wt1wk v hm8loop 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 fihymt9v k t 1,5pwws8g6eld caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fcqxa 9iwaq6 uw/.i jcx(8 l):uield is the

  1 T is equivalent to1b 47c *aanc4q yd-e1dc6hxt k

  The direction of the force on a cu-3 4i9agvrl .bfbk1bi dg39 xarrent-carrying wire in a magnetic field is described by which of the followingfgb134 b- lxi93.gd a9akir bv?

  The force on a current-carrying wire iou dyx* adoqk4q d *3m(dti*:+n a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equu+nr, zno ;9udiq,zv 8*g6jpjal to zero when

  A vertical wire carries a current straight up in a regwcyg,o(blja sce+. . (ion where the magnetic field vector pocwe+cb j s (ly.o.,ga(ints due north. What is the direction of the resulting force on this current?

  A charged particle moves and e-z()-tzn jb wivdfo3 (xperiences no magnetic force. From this we can cotznvd- 3 (bf-(z woji)nclude that

  A charged particle moves with a constant speed through a region where a unid 4uuwz+rl:)um4o t;iform w+m);dtoz r44lu:uu imagnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle mor st1;5cmg2m5 vrg ,dnves across a constant magnetic field. The magnetic force on t nm5gmcvr1r5gs2;d ,this particle

  A charged particle is injected into a uniform magnetic field such that its ve npr/ te8,g 4xq54ysnwlocity vector is perpendicular n5ty/4n , 4pgx8rqewsto the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular pat1a 6c8ffc hbl 4e5kw-oh in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular pcoef - 1 fl4bc58wah6kath would be

  A particle carrying a charge of +e travels in a circular path in, itnrjpm dyf4qz 6r*/:i--. uediz b7 a uniform magnetic field. If instead the particle carried a charge n udfm pri*64r 7j/z,- bqdiz:y .ei-tof +2e, the radius of the circular path would have been

  At a particular instant, an elecyjl dhv.(utr4j. 31q27vrehltron moves eastward at speed V in a uniform magnetic field that is directed straighthv124l rj.re7dtv3ly .h quj( downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upw2i4oe x/c6nq zard as the result of a magnetx6on4c2q ez/iic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there il 9rug37tmp n,rj3cb/;p wqkh6h6 i;is a uniform magnetic field in the +y direction. What is the directiont7 cbp6uir3/hr jpq;39;w ,6lkg mhni of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field prodbuhg8b( dx;;j.:nwwp uced by a long straight current-carrying wire is

  At double the distance from a long current-carr6*h;o rd9chk5n k 7qpef(do.nying wire, the strength of the magnetic field produced9do*( 5rh .7ocefhn kkp;ndq 6 by that wire decreases to

  Two long parallel wires placed side i 3f7wpu8qq0w-by-side on a horizontal table carry identical size currents in opp0fpuqqwwi 783osite 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 wires

  Two long parallel wires placed side-by-side on a horizontal table carry ii *ol: tkbf.2fdentical current straight towari *f2b.tfo:l kd you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currkb 6h(*5r tdq5 t(ebyfents. The magnitude of the force between the wires is F. The current 5kte 5ft b* r(q6(hbdyin each wire is now 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 toc 6a5wqqz 3cg2ward the east alongside and just south of the wire. What is the direction of the force on the p5a 6g2cz qc3qwroton?

  A wire lying in the plane of the page carries a current toward 6f2 gzjp4hb7dthe bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wirg j7z24 bh6fpde, also in the plane of the page, from your right?

  Two long parallel wires are placed sidekzzlm oi h88en/x*2w7-by-side on a horizontal table. If the wires carry currentl7z wxe 2n k/8zio*8mh in the same direction,

  Two long parallel wires are placed side-by-side ot;ys c9(qqtnek0hr0p1 vbf 99n a horizontal table. If the wires carry current in oppo991qnckty0(9 vbf;h srp qte0site directions,

  Consider two current-carrying circular loops 86jb*w.gz fxa 3la8gy. Both are made from one strand of wire and both carry the aj6l zw 8ayb3g.8xg*fsame 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- (w.uze 1ety:1nf io1ocarrying circular loops. Both are made from one strand of wire and both 1 e zu1.fw(i:eyootn1carry the same current, 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 curre 7smf odb+-tkf62cq m7nt carrying loop occurs when the angle between the loop's magnetic moment and the magf2md +7b-m7 tk6fcsqo netic field vector is

  When placed askew in m f1hgb6lw t3u sfkc4h9/s.f2a magnetic field, a current carrying loop that is free to rotate in any direction will experience a torque until its ma/gfu wb 32fh lmtsc1. 964hksfgnetic moment vector

  What fundamental fact underlies the operation of ez ;4i.yl fkiki,5 tf3hssentially all electric motorsziik; i hf.y3 lf,4t5k?

  A circular wire loop lies in a horizontal plane o: rxs0zuv+*87d. gteo vymc7wn 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. Which side of t :0r s du7to7*8wvg. zmyc+vexhe 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 il/6 4x8pgy c(codn*rh +hd ,dof 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 iopdr/g4*c cl x,+dhhy6dn 8(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 consej 5.t -;6qqa jjao1ljists 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, disrej;qltj.jq j a5 1a-oe6gard 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 dckw ;o+c, s29ktka0vtt:; i mcurrent of 0.60 A is oriented parallel to a uniform magnei;:wv09+stkk td ;a2t,ckomc tic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directio f*0-es2ktkrrq /y7sgn 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 /joxq-q1u;v8bgn :cx A when it is placed in a magnetic fi1cu;gv8jq x :nxob/q-eld 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 magnev2 ,.lv c611pquougod;p 0blgtic field of 0.10 T. What minimum current in the rod is needed in order for,16g; uc lvd v0p2uoo.1gq lpb the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. Whandmp . 78dn*zpt is the magnitude of the magnetpdp.8mz*7ndn ic 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 spe+h3 zmfd/f :gred 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 speed om c nvgel07.o5f $5.0 \times 10^7 \; m/s$ 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 spel )-1hp/t9vvf8ch poqed $4.0 \times 10^5 \; m/s$ 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 s9 q:vp5)ke ojnpeed 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 spee4 10w(ztasw:2cam0h +s wfiqid 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 o a;ug/zq;mv z tt +.ur,,yoid4f $3.0 \times 10^6 \; m/s$ 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 thac9adr*ob ( ekaw;3zwc h j88:e magnitude of the magnetic fieldb 3 aeh88d *ja9c(:rwkcowaz; at a distance of 0.15 m from the wire?

  A high power line carrying 1pj5ir(b+i4 wzn3zw 8:e1 kjub000 A generates what magnetic field at the ground, 10 m away?nj(k je 45 +wwu8zzip1b:i3br

  How much current mustl(y*ga xj-x15kqmnh1w in 1 7(yrnzt) flow 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 carryins;2zno4/f:(vb 9,,:az+wueo mk cqgx5xwi t pg 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 magnetic field of abouqcg+9u, xs tk 5zf4nx: oome ;(z:a,/v pwbwi2t $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry curreodw 6j2rm:6*tli4rn s nts of 10 A in opposite directions. They are separated by 40 cm onwrljs6d: t*r64 im2. What is the magnetic 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 0 bwsc;/z z:plzx3bt9l0y2wg 20 A and 5.0 A in opposite directions. The wires are ;l2b c0 g3s/90zxptyb:zww zlseparated by 0.20 m. 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 dim6*ah7sqr 4vg9 jooxsldk: 1; rections. The wires ar1s9vmxh d 4 oj6 gs*kla;q:7roe separated by 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2. vh.n2z8xozn 10 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of .xn21vo8z nh zside 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 and 8.0 A in the opnps2w crv+. ++adc f z./0evqnposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit lengdv+ .zn+sfrw a/ 02.p+ncve cqth between the two wires.

  What is the magnetic field at the center of a circular loop of wire oftkp,/ 9.chjuv radius 4.0 cm when a current o . j/cv,h9uptkf 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field iz(f c-2tu )s 7whc/kqb ejm, ex/+5zlns produced at the center of the solenoid when a current)/c7ejultf bezmqn5,/ sk(c+z2w hx- of 10 A flows?

  A solenoid with 500 turns is 0v7s)gb27rx76 5 zfiryuz gjl-.10 m long and carries a current of 4.0 A. What ssl7zuy)xbgv2ji 77rg 5- rz f6trength of magnetic field will it have at its center?

  How much current must pass through a 40 x1ggr5o8fzi kgq0 2*a0 turn coil 4.0 cm long to generate a 1.0-T magnfrga02 qgo ix1*zk g85etic field at the center?

  How many turns should a 10-cm long solenoid have if it is to generatd .fyuwy* pb*4e 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 q 6*af7qvuce-120 turns that carries 6.0 A if its dimensions are 4q-uac7v* q6 fe.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fielx4twzjt (ou k5 w ,c8 l;vfl+4glk+aj2y) gzs+d of 0.30 T. The current in the loop is 2.0 c,+lj;8gs5)u (w l x tzfykwzkv4+l2tagj+ o4A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional arezf5i7g 4gxqu2 a $0.12 \; m^{2}$ 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 magneticjek* g1 zj;s.o field of 3.5 T. Th *j.kszg 1e;oje loop has 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 magneti fu q8tzi9y4zk,9cxhi6fw 2n5 c field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loopi98 zw5cfzu9qk y4xn6 2 fih,t is parallel to the magnetic field?

  A circular loop of wire of htx u i,y4)geuve76y(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 when the plane v(,e yutguxh4y76ie)of the loop is parallel to the magnetic field?

  A circular wire loop of area( 8w5(8otegnodd 6 bel $0.25 \; m^{2}$ 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 sieopvp*.(d l 9mngle-charged particle (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 velo:gwbaq v4v0vw0 qk8s9 city $6.9 \times 10^6 \; m/s$ 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 throt7;8rwj/wg+ n+sqw blugh a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulti+w7t sjb/wr8+;lgqnw ng orbit?

  A proton is accelerated from rest throu: dp2:v5 j5afhsyvti0 gh 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it fohid52sv yj ::a5tvfp 0llows.

  A beam of electrons is accelerated through a potential difference of 10 kV be y1awwmhx;q) urn+2esi1e- 1, v /raecfore entering a velocity selector. If the B-fi2 i1ce yma;x1ev/,rnh)w- r+qw sue1aeld 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?