If the north poles of two cer ov) n8bri3svye(gsao6 ;3 f(;:ki bar magnets are brought close to each other, the magneyvkro e6v:);3n( cgo8bsfa( ir;3 si ets will

  If the south pole of one bar magnet j m(p4x 4-3f8k giyopmis brought near the north pole of a second bar magnet, thf (8xi3gkp yj4p-m 4ome two magnets will

  If a bar magnet is divided itb t.2s.ji 5t (cn3dtgnto two equal pieces,

  The Earth's geographic North Pole iswl11 nqd+1ffwi+ e:xz magnetically a

  The south pole of a magnet points 8+xwwhk.kff 2 toward the Earth's

  An electric current p duzyn9(y (a li usew89/rar2;roduces

  Which of the following is c1zyr.3 4 uagvdorrect?

  A vertical wire carries a current straight down. To the east3ges.0x+i y tn of this wire, the magnetic field pointg.0ty+ixsn3e s

  A horizontal wire carries a current straigu1qdda*pi, jfhjt9u-h46j . jht toward you. From your point of view, the mag4uj h fuj6d9*d ,j jh.qp1ita-netic field caused by this current

  A current carrying loop of wire lies flat on a table top.o9+nia2.4+rcdsu uzns c)yk- When viewed from above, the current moves around the loop in a counterclockwise sense sn+-ucc )2+u4ri.9ny zadkso . What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. tq9bni7e+* oaok(98tk g7e pnWhen viewed from above, the current moves around the loop in a co( o pne *gb7qttn7keik+9 89oaunterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field l1y*)y e(rjb wis the

  1 T is equivalent topt2nnc0r :7oa7dl 7 ec

  The direction of the force oi se p0j08 sx1)sclia4cvn :;cg-d6dsn a current-carrying wire in a magnetic field is described by wh 1ji:s c sxa i6pg ccvs0;)dl0-des4n8ich of the following?

  The force on a current-carrying wire in a magnetic field is pwmw4 (za)lgkv+68v wthe strongest when

  The force on a current-carrying wire in a magbw64 z6u;jeejnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where kbz c9w ;ze8.8imd*l1z k1 hlnthe magnetic field vector points d9l18dw* .ebicz nkh8zlz1k m ;ue north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. Fromqs om,lhib i:h2/1 x*qw.xsj( this we can conclude ths,.(jhsmhx 1iobl *2/ xqwi: qat

  A charged particle moves with a constant speed thr9 z,7z isr 8hfgm.yn;cough a region where a uniform magnetic field is present. If the magnetic field points s ;.yrih8,fn 7zsg zc9mtraight 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 fo,d(z9x1 xs tw3xq9lh qzn;;mkrce on tsz9hdx ;l(nm t3k1zqxx ,wq9 ;his particle

  A charged particle is injected into a uniform magnetic field such that its vet802vj + oakmv bb c9vur0y8x)fkl*q-+qfg;ilocity vect*cb- b r08m)y+k qffiojqk vu029ax;l+8vt g vor is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular pafgk(xwz+6,ey6;isj n r t +aqp5z 17pxth in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular p(x5r gz,6yqzp n 7+ a+;6wteisp1fxkjath would be

  A particle carrying a charge of +e travels in a circular path in apo6mj1 v ouy87 uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been1jm6u ovp7yo 8

  At a particular instant, an electron moves eastward at srg,u6cp1ube(* .if blpeed V in a uniform magnetic field that is directed straight downward. The magneticg.l b c 6r(1i,pub*euf force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwardn/sk)p 0 sxq9y y8ow07taz.nj as the result of a magnetic field. The direction.wt o009y/qkzysn7 n pxj)8as of the magnetic field is

  An electron moving along the +x axis entex(iu0;zz mrza8/ lqxf v)y) y++kh8esrs a region where there is a uniform magnetic field in the +y direction. What is the direyfx svhz/;ay))8+u 8 z k(x rl+q0imzection of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field producc i3s1oz b m4a(w/e.um0hvd8jsar* a7ed by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of the mauae+gf* gohbd3 i l,9lid--;)o x dv+ngnetic field produced by that wirex-iibuohl+ga , +)de 93o-;fgv* lddn decreases to

  Two long parallel wires placedeu9)w 1vslc w+96hlowyjj :7a side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries curwy6u:7 wlvhc 9eaj1s 9ol)jw+rent 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 tab k.qvk5e:jsk/ le carry identical current straight toward you. From yok5: sjv. /kekqur point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the fo auo-b0hp98mzd(y.z db i; .m,cn-wwhrce between the wires is F. The current in each wire is now doubled. What is the c.0.w h,d(uzydb9wmp;a hb-iz m -8no magnitude of the new force between the two wires?

  A long straight wire carries cdj.+he.qoig.p1u u /7 qt t3flurrent toward the east. A proton moves toward the east alongside and just south of the wire. hutt/d3f.glqjpqe+ 1o7ui . .What is the direction of the force on the proton?

  A wire lying in the plane of the page carrdi rz(ml z9-uy(mao:.x) aq2l ies a current toward the bottom of the page. What is the ly9a.2):mdz(-u r(o ma xiqz ldirection 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-by-side on a horizontal table. Ifc g7-,b vjg(al the wires carry current igg7jb( a lc-v,n the same direction,

  Two long parallel wires are placed side-by-side on a hori h,2qji7po6 . e+vjxffzontal table. If the wires carry current in opposite directions,o2xh.f6ievjp f7j+q ,

  Consider two current-carrying circular loops. Both are made-hi4qngvn 9eu m)b.y* 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 tmgvyiu* .q9 ne4bn)-hhe center of the larger loop is

  Consider two current-carrying circular loops. Both are made f4ikv3 g kg 3rauzhwb 1q)*rf1;rom one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetu4;fzrk k3vg )qrghw*a1b 13iic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current cas09ijh -:ah 03f*sjxwj*n pd* k4aykgrrying loop occurs when the angle between the loop's magnetic moment and the magnetic field vector :x-3*dfy aih00knkw jsh9j gas*jp *4 is

  When placed askew in a ma/iuhhb a .aif6oh(/ :vgnetic field, a current carrying loop that is free to rotate in any direction will experience a torque u /haih:h.( iu/ 6avobfntil its magnetic moment vector

  What fundamental fact2/2u ;ej nsqs- (aoxgc underlies the operation of essentially all electric motors?/ oj- axen2 qusg;s(2c

  A circular wire loop lies in a horizontal plane on a tabl1:(f cx/ ructbe and carries current in a counterclockwise direction when viewed from abovec(/f:rbcx ut1. 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 with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is ac * ;y2( hjicmy;l) bsz,nfp1eq inn66fcelerated 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 unifor2c; yn (jy6*qb1zp n)i; 6nhslff,eim m 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 throajui1 ek- m0)uugh crossed electric and magnetic fields. The forces exerted by these fields are in opposite directio1)iuemku ja0- ns, 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 0.60 A is orienqhpg7xbj- c0rxa0,v04 t)y apted parallel to a uniform magnetic fixgphx 4a) -jbr00qa0ct,yp v7 eld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a diret3vu7 * x3 v1lgtvmi*yction 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 straight5gbuvgdc.5 3 gebpv7: wire carrying 5.0 A when it is placed in bbvge cdpv375u5g:g .a magnetic field of 0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.,vjt m )bpzmd.v5sa :;,wk+hj0 m 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 magnetic force to cancel the w md:,) jw;sh +vp.baz5j,tkmv eight of the rod?

  A stationary proton is in a uniform magnetistfz, 3asl+ /g (xip,tc field of 0.20 T. What is the magnitude of the magnetic for/i stf+3,,t(g axslp zce 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 c7n-o- bn-,kxj zti7h m yb*6:xhap)b*zrf/xspeed 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 ofvf1 )jbz; z3k..jsed j/kgic; $5.0 \times 10^7 \; m/s$ 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 travelinh+yyc1b x+h p7g due north 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 spee4+ (jt22uoy;ea ) ex j/z. isjo;yfuucd 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 speezrd 0mi v-i(rq e*0tc/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 acceleration of the electron.

  A proton has a speed qx9th;1 dl9fj1kyx9qof $3.0 \times 10^6 \; m/s$ 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 (l cvgw *ug4/xwire carries a current of 25 A. What is the magnitude of the ma(gvuc* g x/w4lgnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A geneiiiiya(4p,)u q1x gz so2+47xtx/py x rates what magnetic field at the ground, 10 m awsizxy+,( uixa)x471 y2 g4ip tpx/oiq ay?

  How much current must flow vbvaw 0ih*bcy *h9 5k3for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.0 A is thqaj(wu6 qc5r.3(tf8b3juksb (y*ue re magnitude of the magnetic field due to the j kru6y 33r.cqe5u8(jqub( ab(* fstw wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires cafonb+ 6+zpp(d rry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one d6of(ppz+n b +wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions.1e9ulzh,x ) ez5bspt.6y n6hw The wires are separated by 0.20 m. What is the magnetic field midway6py6 h uzw ,e.)ste51blhzxn9 between the two wires?

  Two long parallel wires carry currents of 20 A and0n+5l. . qjlqqftx +tg 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point qf tlq.gltqj +.n x50+between the two wires are the contributions from the two wires the same?

  Four long parallel wires each caryei7/s) d ub 9fy)qxl(ry 2.0 A in the same direction. 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 plane. What magnetic y(e) b/s dx7 f9ulyi)qfield does one of the wires experience due to the other wires?

  Two long parallel wires carry(okhc+lpx.c* n+ ls p) currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.3k). p+ocp+x (sln*c lh0 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 rf n 9)e29d(gqk bqg-*j yzztm3adius 4.0 cm when a current of 2.0 A flows in yekznqqt)z329 f- m j(*gb9gdthe wire?

  A solenoid 20 cm long is wound wit gpyr e:.k(/ *;ot sveb(zx6lxh 5000 turns of wire. What magnetic field is produced at .z o6gvyebl s*(r(/kp:xxte; the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 fc h-:mdpf tr2xq;t01uxtjle.e99 6m m long and carries a current of 4.0 A. What strength of magnetic.2hmtfj91mx -q px9lt60 u;et: edcfr field will it have at its center?

  How much current must pass through a 400 turn coil.2.ky4rkuy7 l;gt wpiu d,fo9 4.0 cm long to generate a 1.0-T magntuu yg29w.d;i47f ,op krlyk.etic field at the center?

  How many turns should a 10-cm longnv(.thfz , ii8 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 120 turns th ulan*x dym7*v 9km/n(3s ish;at carries 6.0 A if i ;*as*n hmky7du x i9/(lnsv3mts dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 vq4ynb e54ll-./ pchja4pkc. 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 perpendicular to the magnlcpqa lpe4 kn-b.hj5vc /44y .etic field?

  A circular loop of wire of cross-sect+l(pqwh1y. o,wdcnv :ional 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 cure1i)zwm dqpvji bu2s2q :+ +o7rent of 2.0 A is in a magnetic field of 3.5 T. The loop hd2ujbm2 i+eqp: z sv)i7+wqo1as 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.++/s)lck6op4wwzscf vhf+ +ehy , j7g50 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 parallel to thv h c,++g)e/os764f +yk cw+ljzwshp fe magnetic field?

  A circular loop of wire of ritf r3xh7l6 ;vla6a2, 5 ttwhvadius 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 whe6 faah5t6 i;wvt3vt 7xlh 2,rln the plane of the loop is parallel to the magnetic field?

  A circular wire loop xgqjggn74r 46of 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 )tgf 1+ah )o+zmx ijocwc6:r1single-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 ve,.wc rsc( b3gnfb5f5elocity $6.9 \times 10^6 \; m/s$ 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 magv*hmt.c 9fw+3 b3tsu tvht 1(jnetic field of 0.040 T. What is the radius of the proton's resulting orbitbsc1t (f9tvu mt33v+hj t.hw* ?

  A proton is accelerated froir-u85+ ynkenm rest through 500 V. It enters a magnetic field of 0.30 T oriented 5kn r-+ e8uiynperpendicular 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 befo1fmn*uq s+) vbl(0 xzbre entering a velocity selector. If the B-field of the velocity sel ulz 0n1bfbx)( s*+qvmector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?