If the north poles of two bar magnets are broughtg,vvg+qp ; ,dogtb3 4l close to each other, the magnets g 4d ovt,; v+glp3gbq,will

  If the south pole ofmr2e* fr40the1p uy) u one bar magnet is brought near the north pole of a second bar magnet, the two magne1re*hy2mu u0e)tr p f4ts will

  If a bar magnet is divided into two equal piecesnr1x) mtvbxpl;, ;bx;ww3n w5 ,

  The Earth's geographic a(03s2dy:k 6lbovf tnv t 5j81xo:ssrNorth Pole is magnetically a

  The south pole of a magn1:psvh0;m eb.xlhcq2.rq :wmet points toward the Earth's

  An electric current gl9ezj:7 he glr 13c(vproduces

  Which of the following 3nicj o(zi 8 *iaq8.pyis correct?

  A vertical wire carries a current straight down. To the east of this wire,/ q khh-g: *gku e((ywqgx:gtt(;cc;l the magnetic;; wg ul-t/yg(q*k:ch e xt( gk:gh(qc field points

  A horizontal wire carries a current 4aw0/bqpql px1e+m4gstraight toward you. From your point of view, the magnetic fiexq a/gwlmb0 +pe1p4q 4ld caused by this current

  A current carrying loop of wire lies + 3dqtxcku g56sh-w 7nflat on a table top. When viewed from above, the current moves around thencwx h+67-ktg3u 5qsd loop in a counterclockwise sense. 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 flhqtm i+or1)+ vnz 6v3/ ,fhworat 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 z+/qv f31wvh)6+,rnoih m rotthis current, inside the loop? The magnetic field

  The SI unit of magnetic field i hdh3l-hraz(( s the

  1 T is equivalent toapp4l 7fx2,wc

  The direction of the force on a current-carrying wire in a ma4jayhl3c:d)q*/p e nfqf;af * gnetic field is described by which of* elfdn/;h3q) *fyc 4jq aafp: the following?

  The force on a current-carrqd-l )ep0 yv+x/ob9x;ip0tdfying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field21 bg 5zi(hfcq is equal to zero when

  A vertical wire carries a current straight up in a region where the mkzels86nt+ p+:a d(x dagnetic field vector points due north. What is the direction of the resultin p+t(68skdax+z:n ldeg force on this current?

  A charged particle moves and em-kn 87inj,xo (q3 xkpxy+2bxxperiences no magnetic force. From this we can conclude tha-xxy237x+ n q,xkok 8pb(nijm t

  A charged particle moves with a constant speed 5v3g a yso;2ztthrough a region where a uniform magnetic field is present. If the magnetic field points straight upward y23got;sa5zv , the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves acrz s wnc5 of)/jhjq,1gm/45j yboss a constant magnetic field. The magnetic force on this /m hqj j1/w,jyc)5s5on4fbg zparticle

  A charged particle is injected into a uniform magnetic field suc+i,42/fna ms brlf d;cwh14b7zty :rz h that its velocity vector is perpendi2 4btd:rh 4cm71 ziwab/,r sf+ nyf;zlcular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is obsere qf, i2.tv3ph.lb.z:ey mio/ ved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of thfm/ .,. ezi2. 3vie:ltohp byqe circular path would be

  A particle carrying a charge of +e travels in a circular path in a s9bjup1v6:ok w hn3r qkvr+ 3 p.dj3r1uniform magnetic field. If insteajb9rp.p1n3wju :v+oh33 qsr6 kr1 kdvd the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at0f s(l1d fu)elfm8ab4 speed V in a uniform magnetic field that is directed straight downward. The magnetic fbe(f)d1lsmlu af 4f8 0orce that acts on it is

  An electron has an initial velocity to the niyw3g h+d 63w.gex3t south but is observed to curve upward as t3 x3g wd3t.wn yihg+e6he result of a magnetic field. The direction of the magnetic field is

  An electron moving along tqs 1y p+arre88he +x axis enters a region where there is a uniform magneta1e s8pyrq r+8ic field in 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 ,bv 0 znp 7310w aiiade65mpbocurrent-carrying wire is

  At double the distance from a lon rjue:7tp8- pmg current-carrying wire, the strength of the magnetic field produced by8m r t7jp-ue:p that wire decreases to

  Two long parallel wires placed side-by-side z rbrkq5l4tp *(,*.d (yqdeqgon a horizontal table 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. Frr d*k,pq5r t (qg(.lz*eq4dby om your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-sido*h+:eygyzaihj;+ yif22 p8 ge on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the two jze2y+y8p h* io+ ya gfg;2i:hwires

  Two long parallel wires carry equal currents. The o- )aapr( hiip) ;wwl ,ky13cqmagnitude of the force between the wires is F. The current in each wire is now doubled. Whapcqrh,3y)ika w( a 1 ipowl-;)t is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves toward thias,z),f inw l:z*ld.7gpb)d e east alongside and just southbp,, lzi) .sza 7g)f*w:idn dl of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a currenc(fl xyu 32rn6t toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in theyrc f 6xn3lu(2 plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a hfxw) s zw kttil8 ;9djw:0i82borizontal table. If the wires carry current in the same directioi k;2b0tfls d88tw9 xww)z:ji n,

  Two long parallel wires are placed side-by-side on a ho0g ekt(ez cfgrkz1l;mq8 /0)jvx;q9b rizontal table. If the wires carrk )le0ejgft b;qkc(xg8r;vzm/z 9q01y current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strans; yz*j+g.hp fklr. hmov3 xovq-4 k11d of wire and bkj q mxh*v zo+olsp .; 4r13gyfhvk.1-oth 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 current-carrying circular loops. Both are made from one strandrae0fp+v2c1d9.zg dv of wire and both carry the same current, but one has twice the radius of the other. Compared to the ma va0f2dec9 . pz+grv1dgnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angbexlhn 74) 7ngle between the loop's magnetihx 47lne nb)7gc moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop 7 )q ms2ap;wx0z(lzb hthat is free to rotate in any direction will experience a torque until its magnetic7(zlaq ;m hxwzbsp)2 0 moment vector

  What fundamental fact uc s b 9k88/clx.4nhxcznderlies the operation of essentially all electric motors?bx /4 c nslc89z.xck8h

  A circular wire loop lies in a horizontal plane on a table m88bye tbb y*ddj -7lv2fiiybn/d1/ 4and 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 -bylt/f8y8ejv7iydm/b *inbbdd1 24with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is +1se hqgns schr3: p4./xj2bwhxtx59accelerated 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 uniform and oriented +q:xr/3g94xscsb es1jh tn .2pwh5 x hperpendicular 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 2 mc+3pfnbu n0consists 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, disregard the magnitudes of the fields. In a velocity selector, the particles move toward the east, and the magnetic field is directen0bfnuc+ 3p m2d to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented pazxm ad2n0 9pm-t4jw l;rallel to a uniform magnetic field zt4jlw9 ;nm0m- d2paxof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction t7u:w f1wbga+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 straigqc5gb mr5ker0nfdh.2p. 9 i1iht wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wnbrdpg5e r.9. c5i fikm1q20hire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m ab 2y(f 4ffm s:pz+wt0long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. 4 fsp(ytza+f0fmw: b2 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 maj*x5o qcfos;u+kh; ;rgnetic field of 0.20 T. What is the magnitude of the magnetic force on the prot qo; kxfu;rhj+5c o*s;on?

  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 spevn. s;wf7y 5sxe;xz( ved 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 sp2isv)v-x:f roeed 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 duef*(n .xm fa;ul 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 speed odmw7 rab br5qb hf)ad2))y03v)c sr.df $8.0 \times 10^6 \; m/s$ 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 spe*xe.n.nuntq(8u7rl f o1 o)peed 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 +)mpu *1d(6s- m * mdl2jjvwdsk9uurt-xtp q6$3.0 \times 10^6 \; m/s$ 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 magnitudiy)* j ggw/-pc)5qt q q;d gd(ndt;s-de of the magnetic field at a dpi dq(qy *qng -j) tc-/gw;ds5;ddgt)istance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magkp;q7c ks)*2s1 l su: msjsv9enetic field at the ground, 10l)7: 9 su2*p1 skvcqssjk ;esm m away?

  How much current must flow00z)xolqczjw6 (bj k0 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 3wb;dag+ds :.3tznfc(uxc + wwire carrying a current of 5.0 A is the magnitude of the magnetic field dufn;g33as+ cc+tzud(. bd:wx we to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wirh.hy6u -vl1li es carry 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 th.- hvl1h6uy ilat is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A andg(*rcz0li. rx 5.0 A in opposite directions.rl *.x0(czig r The wires are separated 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 direlgfs;h -z8 tt pet+;*ections. The wires are separated by 0.20 m. At w 8+hg; fte-st pt*;ezlhat point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They ar pv)o nlu*td1k1tf(a5*ils. fe parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm poli t1fl5*nfpsv au (1o* .dk)tsitioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry curu7t1zf +xuye3 xuuo/ m9ra8 t-rents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per uniuyamx/u e fu9o u1+87tr-tz3xt length between the two wires.

  What is the magnetic field at the center of a circular loodl5df) 7ac;kd6nt9 yu p of wire of radius 4.0d d 5 kcuf;dyt9al)67n cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns o;b+j8rce 4cgwc:xb/hmyd + 81p ,slrzf wire. What magnetic field is produced8 :4/,chc8zdjgb 1ey c;mwrsx+prb l+ at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carriese31i* 6jl wr)isz uov* a current of 4.0 A. What strength of m uzjiv)s *e6ol1ir3* wagnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm)x 1tbha2mcrji z- tf 309+asd long to generate a 1.0-T mada93c2 zj0-+mf r1satih )btxgnetic field at the center?

  How many turns should a 10-cm long solenoid have if i :7h*ric8f dyn-(zh nlt 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 p6* bu 8,9/jnnrzkr-f6 nrbelthat carries 6.0 A if its dimensio9-nf6 pb6*/rj, r u8kbl zrnnens are 4.0 cm x 8.0 cm?

  A circular loop of wire of radi ,6.kqwehhtj1: u9 dmius 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 magnetic9quhih dwe,jm: .61tk torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wiregl 5n)4gtd.n e 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.zma9 lb,c c( ,ah gpiep/c5)8l0 A is in a magnetic field of 3.5 T. The loop 8ig )pl, /z9am5 ah,lb(cpce chas 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 magnetic field of 0.30xx6t8q9//vpujgzi 5 6bd l;e:cy l)gm T. The current in the loop is 2.0 A. What isdtj8lipy ;bvl/x:6m6g5qxg ) z/ eu9c 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 m./ hiis12efwv : v4 -s,drtuvqagnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque whdvesi-/uqf:1v2thw i4v, .rsen the plane of the loop is parallel to the magnetic field?

  A circular wire loop hwss i)znli;8 otg(rb. w6 b7a6c4o e;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 4k;9 )hulegx dparticle (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 veloci (*atzj ,umn-mu+crpeew( 48q1tqsr 0ty $6.9 \times 10^6 \; m/s$ 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 potenti7 s 1)k9sp(tir npkm)mal of 1.0 kV and then moves into a magnetic field 1m9msp))7nskkp (t ri of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic tdy tu(7g8o 1w-jo2pb/gu/gkfield of 0.30 T oriented perpendicular pg y2uo8dkut-/go (g w1j7/tbto 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 befs,8tmk . jpvk,c lb/0zore es8j0k ltp bzmck,.v,/ntering 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?