If the north poles of two bar ma)e( p ;zcqgi/cgnets are brought close to each other, the magnets wilc(; p)qg/ciez l

  If the south pole of one bar magnet ism9j4u) +uhiiq 3gtz ,k brought near the north pole of a second bar gq4iik,z)u3utm9j+ hmagnet, the two magnets will

  If a bar magnet is divided into two equal pieces,u *2 grz;)m dy(d4lgsf

  The Earth's geographic N uhqjo- jyw 96t6xvl6m +mzt/9orth Pole is magnetically a

  The south pole of a magnet points toward thuokt);mza wy kz w714rwwi6/t0 k fh(-e Earth's

  An electric current produces-ioxwnxb 1e+pwlgu :mi 9: u:6

  Which of the following is co7 rzkl,vnn: 4gnoj 3w-rrect?

  A vertical wire carries a current straight down. To the east of this wi(dqds;h*f+o;ja a oozsf4 bd1xjj .:8re, the magnetic field p*j(: 48;b;sdq sjfao.+ z dxfoh ojad1oints

  A horizontal wire carries a xsqq 5u(0 di(g5 7 .lgnbseukq(.pmf:current straight toward you. From your point of view, t np7eflg. dsqb(5u. iqq( xk(m5gs:u0he magnetic field caused by this current

  A current carrying loop of wic6ddqt63j)e ,a69g.epjb rp-*pie qr 5mgmw 4re 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 tmirpq ewem6 6 cdbpeqj4,g gjp. 5*93)t-dar6his current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a tahjf qjcvm9.ih3kc1 au25 /4f dble top. When viewed from above, the current moves around the loop in a counterclockwise sense. 3a/ 9 fd4v 5chq21ju.kchmfij What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is thr*ngkbm+-7.5 tq xv/ptb qsh ;q*oih9t. r4f xe

  1 T is equivalent to-zsnvu lt8 pbb-1s0rya )b7 +d

  The direction of the force on a current-carrying wire ab/((su9 ruc *t7dqo,s qkm 8knt /ci4in a magnetic field is described by which of thdq/q inmkb9/r*8 ot,c( sk uas74tuc(e following?

  The force on a current-carrying wire in a magnetic fieln r x,zqcbnhh:ji-t k+5,0t*f d is the strongest when

  The force on a current-carrying wire in a magnetic field is equal toc6 kp -;t8rgljmd;z:e zero when

  A vertical wire carries a current straight upa3( s *nqa18auvn7w ts ns.e6c in a region where the magnetic field vector points due north. What is the direc6s1s .uanea7 *aq8t3cvns (wntion of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we c**m)vxy)r( u+xvns 0slvj*bcan conclude t*m+nv() vu vjsxc0lx*)srb y *hat

  A charged particle moves with a c2nlikaa* bkx6ro y4+l uqt-- g--:mg konstant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force actialkxqro:2 t-kngl*g-u+y 64-abk-ming on this particle will be maximum when the particle moves

  A charged particle moves across a constant magneticuvuls a/ h)6fs lns( r*8d(x.o field. The magnetic force on thishufd.6olvr( s(/su ax*)s8 ln particle

  A charged particle is injj - 6yh3limx2jected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the part6- imj2h 3xjlyicle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uni1(fc;fv xlpy mjic-*8form magnetic fie c*(pyl8i1 -xfj;mvcfld. 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 circul lbipwm dx0(;o),pqp+ar path in a uniform magnetic field. If instead the particle carried a charge of +2e, t0w;dl xpm+pob( ,)iqphe radius of the circular path would have been

  At a particular instant, an elect7asbv rc()sb*eict; .ron moves eastward at speed V in a uniform magnetic field that is directed straight downwse(.;v *ic 7bcbrsat)ard. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed t vo :i5 8+ibix/ qypdem,x2ly0;snaq;o curve upward as the result of a magnetic field. The direca8neio,x; v/: qpqm+20disxy5 ; iybltion of the magnetic field is

  An electron moving a4wqpfi) )u4xv pw 83mllong the +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the diu)m wpl3i44vqx)f w8prection of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field producef e(3cy(n7 l)g nw-n ejngcf-;d by a long straight current-carrying wire is

  At double the distance from a wuv ++h tk4sif0vv58y long current-carrying wire, the strength of the magneti k5u 4fvt0y8 wshviv++c field produced by that wire decreases to

  Two long parallel wires placeda)h19pf 5p6lpsh z4j k side-by-side on a horizontal table carry identicahplh456) p1zfjk9pa sl 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 two wires

  Two long parallel wires placed side-by-side on a hdcugryeq4: ;s 0 1.gss.xhb 4borizontal table carry identical current straight toward you. From your point of view, the magnetic field at th x y:1 gescugq.0 r44s;hbdbs.e point exactly between the two wires

  Two long parallel wires4w xq) lpud+wj4-:m 7qfr2xtf carry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude otj2 u)qwwp44ldx:mfr7+- fxqf the new force between the two wires?

  A long straight wire carries cur4u8a vw yqt)e+rent toward the east. A proton moves toward the east alongside and just south a qe)v48yw tu+of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a currxx22vzx 2 dlycn: 1lkf2zo m/5 hbad)/ent toward the bottom of the page. What is the 2k a2h lcm)nx2 vzf/lz25/x1 dod yxb: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 right?

  Two long parallel wires are placed side-bybzz. fym7q)4 f 5r1hfq-side on a horizontal table. If the wires carry current in the same direction,4r5)yffhq1bqz m7fz.

  Two long parallel wires are placed side-by-siddc0ri(gi; ck)psw/qa50n p+.zl -/p8ucruvme on a horizontal table. If the wicwcc0 pp)z+;u lgd/r.p0a( im 8run5sq k/i v-res carry current in opposite directions,

  Consider two current-carrying circular loops.m5+qyp pvf(rbj.d x+l: cwi81 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 field at the center of the smaller loop, the magnetic field at the center of tmlvciy1 pjq+.rdf:+xb(w5 p 8 he larger loop is

  Consider two current-carrying circular loops. 3a1g f :rki.lna d8tq3Both are made from one strand of wire and both carry the same current, but 1i3 a:fk drq83gtn .alone 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 carnqac9l: /nru7rying loop occurs when the angle between the loop's magnetic momentu79 ancl:/rq n and the magnetic field vector is

  When placed askew in a magnetic q4 ndjd 7h.pe mu.v;:ea9)gidfield, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment vectien7up. 9;dhq.ddg:j) e amv 4or

  What fundamental fact underlies the operation of xg :3-hta*i eh3o idx*pdh/x;essentially all electric motors?3 o*pah:x;x* ix /hhitg -d3ed

  A circular wire loop lies in a dpil/j at .s- jb850cmhorizontal plane on 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 the coil tends to lift off of the table because of the torque caused by the currents inter /b0jslj 5-dm8.cpa itaction with the magnetic field?

  In a mass spectrometer a particlh6 yhp-b8 8bh oqt3vg.e of mass m and charge q is accelerated through a potential difference V and allowed to enter a magneticy 8ph3tvqobgh8 6b .h- 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 an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through crossed eq2wreqwyzs5/4+ .c ollectric and magnetic fields. The forces exerted by these fields co szr+/yqlq.w 542weare 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 point?

  A 2.0-m wire carrying a current of 0.6jk77zl*q e .m+q,owbm 0 A is oriented parallel to a uniform magnetic field ,wj7 lk ob*q7zeqm.m+ of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a d),/gebg:iz,qovon7 ,s7zdj nirection 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 it is placed bz6g9 qf+p9 ,coj27sol;wwbw d1fgy8in a magnetic field of 0.020 T? The wire + zwg bj, woyq998c;fsb1f72lgow p6d 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 ob3rln;gf q91p* *sj75nem r(h e tl;a0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the ma*fq;jr *me9on 3b; at71p 5 llhsr(egngnetic force to cancel the weight of the rod?

  A stationary proton ik,y7i ln.jl b+s in a uniform magnetic field of 0.20 T. What is the magniy.kl+nj i7l ,btude 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 mq3o3tw m6o 2gspeed 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 speq s)*qj/cmw.qlf2 )q aed 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 nohq-6nw ttvo/9rth 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 speed ow,)mtd/j5d veb ,3vamf $8.0 \times 10^6 \; m/s$ 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 sp yy: ye- f.w+92dykdmdeed 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 :uiq)jlhh; togy2. 7p$3.0 \times 10^6 \; m/s$ 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 f xh yt8t: 2ui9 z7c;+8aegdarcarries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wire:h8ycad82zfxrt9; ea7 gi t+ u?

  A high power line carrying 1000 A generates what mah9v x f1,r; * s l5/nm;kmj:quhqm4eihgnetic field at the ground, 10 mq*4:h,;9mu5nr;keif1v /sxh mjh lq m away?

  How much current must flow fort38 pedkv 6lg.sk4e/r0pli ; y $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from9zt5b2 tyufqe3d(ze+ a long straight wire 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 magnetiu z5fy(9qzdt e23t+ ebc field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wire-ovdk6:9.*w5gogkip o )u mpos carry currents of 10 A in opposite directions. They are sek65.u og wko* po)gm:i-9vopd parated 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 cm from the other?

  Two long parallel wires carry currentc r7elxn7/b 3o6i,effg ;h9aqs of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway , /h7rbqfcolag69ex7f 3ein;between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 iw9ab*n cl;) lbb c*-uA in opposite directions. The wires are sepa;-c9)*n i*buawlbbclrated 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 2.0 A ,j-vnqgjr ,o6g2v8 vr in the same direction. They are parallel to the z-axis, andogr6v r- ,8gjvn 2,qjv 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 the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposite directv6y clz 6s e):2d.yktcion. The wires e6y sc.)y:kld2t cv z6are 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 gc go/ova4aqa,*:x,e radius 4.0 cm when a ga ,* eq,xvag:o4/oca current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of:8n ikh vt5g-h wire. What magnetic field is produced at the center of the solenoid when a current of vh5 g8ti:k -hn10 A flows?

  A solenoid with 500 turns is 0.10 m lom ,dml9wrc./sbq; )kqng and carries a current of 4.0 A. What strength ocqrw.mk s)/,;bmq9d lf magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate y0kmsj* (7qp3lxza( 6ue o6bq;h/jbva 1.0-T magnetic field at bl y 0(*puqmj ;ske(xh oj a6/v63qz7bthe center?

  How many turns should a 10-cm dou1gtuph+be/ aww fp: 16 -1rlong solenoid have 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 -4 8 jlonx.z:fwteic0z62hsdof a rectangular loop of 120 turns that carries 6.0 A if its dimension0h-8ol 4w: c xtize.nd2fs6 jzs are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field o hr5rwj c++t ha.l1qr9f 0.30 T. T.r1+ lw9 crhtq +jr5ahhe current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wirex;) ft(h8jxnj h/qeg) of 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 in a magnetic fiel;vsc;2 c of-x zd kn+d(e*dj-fd of 3.5 T. The loop h f-czcx+2-dndfkvd *;e o(; sjas 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 a51fkn;udi) sv uniform magnetic field of 0.30 T u );fnd51vksi. 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 rar8g+7bkt.ox;m im -ava8jn8z dius 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 parall8m;7xg tjko 8arz8 a+-m.ivn bel to the magnetic field?

  A circular wire loop8o:abm pa /rrsx3xo.-*t q*y g of 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 mqq9 r3y/;bq lsxyl o73kp.b0(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 veloh hr 4;osd)m0zcity $6.9 \times 10^6 \; m/s$ 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 ax7 uwn.th;*ud/ )fiy g magnetic field of 0.040 T. What is the radius of the w* )7uxd .tu;h/gnifyproton's resulting orbit?

  A proton is accelerated from rest through 500 V. cwm(+uz lqs 3l8 1koyc n9w-f1It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determin+z3ll8(ckn9s w 1m1ofyuc -wqe the radius of the path it follows.

  A beam of electrons is accelerated through a potential difrgmf / p85va1nference of 10 kV before 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 undeflected?1 gpmvnfr8a5 /