If the north poles of two bar magnets are brought close to ee n y51*-w)fn6cue9o gn*t exzach other, the magnegnf yn wete19z x)-5o*unc *6ets will

  If the south pole of one bar m.o*uym t6 a ofzm24dg/agnet is brought near the north pole of a second bar magnet, the two magnez aou f yd/*4m62gmt.ots will

  If a bar magnet is divided i :h2gycogvb y sh0j,g;3p;sd 1nto two equal pieces,

  The Earth's geographic North Pole is magneticalal6t:v ts/yj .9tj 5cqly a

  The south pole of a magnet points toward the x3j5fh:fi ,e(podbg(y3a- hcEarth's

  An electric current produce q b /ndy,1ch1sad*e1xmvpk6 5glro+)s

  Which of the following 9 f349mq-4(g rtub qrxbbcpi )is correct?

  A vertical wire carries a k)q:/fn*vl op current straight down. To the east of this wire, the magnetic field poinkp)l v:q/f o*nts

  A horizontal wire carries a current straight toward y4z) tos eg0anw/0r,lzou. From your point of view, the magnetic field causega or0/zzel)s4 ,t0wnd by this current

  A current carrying loop of wire lies flat on a table top. When 8 dme6i r4nag3vbl h+vr05)oyviewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field 6 )8n0r 5l yh3mdvie4v+ brgoacaused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. W2c4:h8v p,-o x5xjn2kprx bzyy+co.g hen viewed from above,c g52ny p,: covkj- .oxpy+h8xrx4z2 b the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magneti(dwsdq y)y5t )c field is the

  1 T is equivalent tod 97lxt-oz5:stnwdo-d+y ef )

  The direction of the force on a current-carfk+8opeg0 h;b0lfp,gh ezd)2rying wire in a magnetic field is described bl he0gpfzb8 hg,2k e)+f;p0o dy which of the following?

  The force on a current-carrying wire in a magnetic field isotp0tv9u*;e5 lb.m oh the strongest when

  The force on a current-carrying wire in a magnetic field is equa pgc( czbvus1c2qhvv vz68*3(l to zero when

  A vertical wire carries a current s jrx.5 4pt: hx-qny5sy3p *8(hdzirwitraight up in a region where the magnetic fie:.hi-s pxt(w3r 5 h*4dqyxpznj85 yr ild vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and expe+7 o4;m:i ouxoe8honiriences no magnetic force. From this we can conclude t 8i;:ho+ oinoo7uem4xhat

  A charged particle moves with a constant spe4af8* xnb)eek ed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this partic4en*ab ex) fk8le will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The map9 st/lg1wgf j66nk-dgnetic force on this pwn-69 s61fgljtpd/ kgarticle

  A charged particle is injected into a uniform magnetic field such that /w hmpoy.gguz59b i *51h7y llits velocity vector is perpendicular to the magnetic field vector y/wz h79lhp5gl.by um o15ig*. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling *7 w -zw9dk9qd7 vtvovin a circular path in a uniform magnetic field. If the particle had been travel79dwd9q 7wvtv o-kv*z ing twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a b/c7 bqffx k)x g-d2w 7uao*j*nzhr+.circular path in a uniform magnetic field. If instead t krwf/o x n7hu7-bxqb*agdf) c+2*z. jhe particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electronu3 .csxhs*)xdr r9d5 x moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnet3r )hc*x9.d rdxx u5ssic force that acts on it is

  An electron has an initial velocity to the south but is observed k: i,r t/jq)qpto curve upward as the result of a magnetic field)ri k:,q/ptjq . The direction of the magnetic field is

  An electron moving along the +x axisewev*yo(gz + 3s416(a ka dwgf enters a region where there is a uniform magnetic field in eswg* 6( dawf3ogv yk+4a(ze1 the +y direction. 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 straight currukh *8ew7 2 d2zbmxx,ye v1/znent-carrying wire is

  At double the distance from a long current-carrying wire, the strength of t4gksz ,lq),otc 5lhpvh* z.a. he magnetic field produced by that wire de) v p hlcq*h z5l.z.g4,k,asotcreases to

  Two long parallel wires placed side-by-side on a horizoah0v,z w 97xqyntal table carry identical size currents in opposite directions. The wire ,0vy7a xzqh9w 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 plac,-9 )6vk odpvf djv.died side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic dv-i,fpj )d6 okvv.9d field at the point exactly between the two wires

  Two long parallel wires carry equal curren lst qfk.k.+7jts. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wirek.k f7q+lstj .s?

  A long straight wire carries current toward the east. A proton moves toward 7 hr2ru,v:9mmr4agj9g8xalw the east alongside and just south of the wire. What is the direction of the force on trgarg7v9m 8m42rh 9u:jw la x,he proton?

  A wire lying in the plane of the page carries a current toward v) ihl*c(tqt6rei ( zb*gwz .9the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perp((.twci9ig)evbt rlz h z *q6*endicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizkdql 38s6m nh5ontal table. If the wires carry current in5 m6lsh8dqn3k the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. Impawl19- v c)if the wires carry current in opposite - mai) lcwp9v1directions,

  Consider two current-carrying circular loops. Both are made from one strand of t4f l3l,8j rjdogj h)4wire 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, thhtrf g83,4jj)ojd4ll e magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from onsom e80y) ih;ml ;ml 5lcsv;4ne strand of wire and both carry 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 lars8l ;lnis m;moe;5chyv)0 ml 4ger loop is

  The maximum torque on a current carrying loop occurs when the angle between thez37,keinki 9)6a uirykr5 s6 h luys)r,36z 7kih5 i keirn 6k9aoop's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying luza+x/oqw e1rl;hn 39 oop that is free to rotate in any direction will experience a torque untilrol x3; qa+1ehnu w/9z its magnetic moment vector

  What fundamental fact underlies the op6mxsq1u8azsl8/ 3jnd 1;lw em*6gnx seration of essentially all electric motorsdj6ues6 nssq;3 mlx 1z8lg8 xm/ wn*1a?

  A circular wire loop lies in 6vhn*b y vj(c-jx0uwva8)x1wa horizontal 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 interaction wit wjxvnwcb*v v-y61a0jhux() 8h the magnetic field?

  In a mass spectrometer a partic0j5fp291;kfay yc 9cao/th njle of mass m and charge q is accelerated through a potential differenc2yt9yjcoan9/ p;1hk fj5 af0 ce 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. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged p j;mv ik74tda-i2g+d hg7; n0nrq5k luarticle 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 direct-nm7lg;gnktr5dvdi0 4 ak27 h uq +i;jion should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriendj lw7vxq;3 (dlpwv/w1l .,aated parallel to a uniform magnetic fx ww(plv71jv3a qdl/,wl;a d .ield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a d2zyxz.gp8xb q: 2)is f4c5lp birection 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 ii,opl /hgz wv;g7c3a4 t is placed in a magnetic fieldgw;ag4/h7 vi,o c p3lz 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 awn rl,h s7vt;)+0c wg,djbw :lnd is in a magnetic field of 0.10 T. What m7,0w v h s:,)wn d+wb;lcrjtglinimum 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 field ofhun 4y93k f)l1c2p ebo 0.20 T. What is the magnitude of the magnetic force on the prp)ufy 19 nc32khb oe4loton?

  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 spe24zhl;dv v5+gnd4i zxed 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 speedwccji et, ;)o (p:2(n6egnji*onsh- e 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 speed:sqp t4 ol:-mi ryd6+q $4.0 \times 10^5 \; m/s$ 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 speeenj0 e(d(jj9h2ts 8ts d 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 speedi *hhk4b /rm (,+dxwlm 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 i n0ru3-) (ymgvk4vjkof $3.0 \times 10^6 \; m/s$ 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 the m g ums6; 44xuiyvt4a.8ngs s0sc+rz ,aagnitude of the magnetic field at a dis44, sagmi xr+a468n0.u zguyscsvts;tance of 0.15 m from the wire?

  A high power line carryin g6e nq*gj/psl,ow7t-g 1000 A generates what magnetic field at the ground, 1nl6*/wsgjeoq7 g-t, p 0 m away?

  How much current mus9+q,i(*kyx anzpfh (ucna ,:ht 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 cute9 8z* f/sw3bn3c rharrying a current of 5.0 A is the magnitude of the magnehcnz8/339e uw br*t sftic field due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 Aujr+lemx3bxcy :f:9 lcyn.96 in opposite directions. They are separated by 40 cm. What is the magnetic fiel:c mlc63 x ex9jrfu+l.9 byyn:d 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 currents7jamu m ;2bpewv;o 1: .hxy0fe 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 two w b;e7 jmmo1:0;yvaxw hf.p u2eires?

  Two long parallel wiresr 5 0op0i c0osmc wfu/)z ciw-9i--kwn carry currents 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 a)0c-o0z uw9wofi5i-wrpmc cn / 0ki s-re the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same directio./i;z.pfnbw56 q jc cag.jla3 n. They 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 placpjw;3 5fz.b cgaq.j n a/.li6ne. 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 tq677 bnatfv /lywog 1-5y s9lj3jdsm 6he opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two w7 1fa3tlvm/ ngd7 6yb swl-s6j 9o5yqjires.

  What is the magnetic field at the centegmrbq. h9gf*84*-lqssm 9 hvxr of a circular loop of wire of radius 4.08 xqm*9l.sgvgh-qrh9f *m 4 sb cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magqcw b1tsxg..u.pr/x 9netic field is produced at the center of the solenoid when a current of 10 A flows? rgw.t.9uqbp sx1xc./

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. Whatzu pia )q 0.+m+zbct4j strength of magnetic fzp )4.tmqj0b ++aicuzield will it have at its center?

  How much current must pass through a 400 turn z22t :fz2heko coil 4.0 cm long to generate a 1.0-T m tzfkz22:oh2eagnetic field at the center?

  How many turns should a44feo: - a1 rt2xk/au,guhg wp 10-cm long 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 of a rectangular loop of -7mn9 uyu.cq-j kthwo 6/6gtj120 turns that carries 6.0 A if its dimensions are 4.0 cm x h/oj6k7 t6. ngywuj c --q9utm8.0 cm?

  A circular loop of wire of radius , ebw;qh ky:;m (nd5 v/.xberk0.50 m is in a uniform magnetic field of 0.30 T. The cure wdqe;x/nmbv h,.kk(r5: b y;rent 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 wire of cross-sectional arw-q fl;f3lqj y,d/vvt eb3hh)c b4 2yx:/gdt)ea $0.12 \; m^{2}$ 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 aqn )x,,x qi;i,7t)6ndxipka s current of 2.0 A is in a magnetic field of 3.5 T. The loop has an i,,q76itk xsiq,dxan)) x; pn 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 uniform28 nu55ku(daqa h /irf magnetic field of 0.30 T. The current in the loop is 2/u k8i( 55h2afra dqnu.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 magnez n 4q)6s,krmutic field of 0.30 T. The current in the loop is 2.0 A. z)k,qn46rmsu What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of a 5vsx0e xcx1/ ndvf)so )ix72zrea $0.25 \; m^{2}$ 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) ha9wi 4vk6pk di;hi6ucd3 1l*ax+v hip9s 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 velwjze,f4 5z wqruptm.zouf9k1 h 3) a3.ocity $6.9 \times 10^6 \; m/s$ 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 ma8763wuzkx tq 3:t1icr ri6lmoves into a magnetic field of 0.040 T. What is the raz:utmr 7 i68k33liqc1w xt6 radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic f js zf0 zci4(+x:f* mhaz73mczk 39frfield of im4:f9zf3zha(mcx 0rj kfsz+ z f*7 3c0.30 T oriented 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 befo (-iq f2m,q-oshtswi fj+)* ljre 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 h)wi offjj*2qq-mt+(l i,s-s are to be undeflected?