If the north poles of twon qcxh* .,q/ tffoet+7;ex0fu bar magnets are brought close to each other, the magnet/*cq.e+ e7;tux xfn0tof,fhqs will

  If the south pole of one bar mdvgzm a1tsb/g1/2/+x u6b czmagnet is brought near the north pole of a second bar magnet, the two mzgz1sm/ xb +/dct6/2 gumva1 bagnets will

  If a bar magnet is divided ipv + uh,)4.dqctenmz8 nto two equal pieces,

  The Earth's geographic Nort* s z/,d(co+w,ua ujpqh Pole is magnetically a

  The south pole of a ma6y u.u*m7hho hgnet points toward the Earth's

  An electric current pl3o2-0 tsxhbueg97:tg yk4h c5lh hv8roduces

  Which of the following is j 9cc b:(we;;zd sbd)ecorrect?

  A vertical wire carries a current straight down. 3;z+ytb; k4o/ gcl fv-k9ofqh To the east of this wire, the magnetic field pointv kzo3 t;/o+k4cff-g;l9hb qys

  A horizontal wire carries a current stqw+.zt vt9+na tm4lo5raight toward you. From your point of view, the magnetic field caused by this 4volt++9w m.aznt tq5 current

  A current carrying loop o-:3lh crt/ygs+fobq xpwn +/p-x su.7 f 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 field caused by this current, - sp:fpqo xbg73rlsyx/w hu.ct-n/++outside the loop? The magnetic field

  A current carrying c:w j3jel*5)nn4 fz,oezt)-k j y(h;awmifr1xircular loop 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 magwkn,xom fy:3r 1l h t5n 4*ajf)wzjee-z(); jinetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fii;i+ava1i kqaim16qc t- k/9eeld is the

  1 T is equivalent to2hn7zp t2+w,. w ,yfgicg,g 5c h56qyyh iq:vs

  The direction of the force onz (-bij )ruw7e a current-carrying wire in a magnetic field is describedb7-ru eji wz() by which of the following?

  The force on a current-carryin 4 isj+ljv- 7vzsfzg7*g wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magj)-gx7ww)g 3z+: irrghbsvx;ggw7 )ar9tls ;netic field is equal to zero when

  A vertical wire carries a current straight up ed2zbg;dyvd+0 /wv2q in a region where the magnetic field vector points due north. What is the direction of the resulting force on thisd /qv2ew+zd0v 2yd g;b current?

  A charged particle moves and experiences no ;.f. p+sxdszwmagnetic force. From this we can conclude thas pswxzd. f;.+t

  A charged particle moves wike ev (qvtd+n9b8xl 32th a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this partib d 2v39vkne+tx(8q elcle will be maximum when the particle moves

  A charged particle moves across a constant magnetic fizd s)6aw.gooojr; * c;eld. The magnetic force on this ;;d z*r. asgc6wo ojo)particle

  A charged particle is injected into a uniform magnetic field such that its vefw69fc4hl-o :hijsl ( locity ve-lho6c (l hw ffij4s9:ctor is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed trk9 zu pyht.6v-*-,zks2 gpwl)a/ vwqkaveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would be/qya2k)vk, hw-9 *pwvkt zps ugl6.-z

  A particle carrying a charge of +e travels o9 a v7dth9yu6g+lb wvqj56j7;ih,ov in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the , bit; 7hvd7h9v9ao+6yjvu o 5wgj6lq circular path would have been

  At a particular instant, an elect+h7f/lha us n.6 bw7gjron moves eastward at speed V in a uniform magnetic field that is directed straight do6/bwsa+jgh . 7uhfln 7wnward. The magnetic force that acts on it is

  An electron has an initial velocit h88n+yld1(ydl soca3y to the south but is observed to curve upward as the result of a magnet(lds1h8a3yc dno l+y8ic field. The direction of the magnetic field is

  An electron moving ali2 p,yploqnk4g9 **d/8f wzy aong the +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of th2yoy d9p k4*z8fi,/w plqag n*e magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying wire5pd7qacveg65 wf6 .aidapl-8u /aq1va+ l xl+ is

  At double the distance from a long curr4bb6 lw4+c yxgent-carrying wire, the strength of the magnetbc6l 44y+ xgbwic field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry id.ejo+cf k rn-(entical size currenfc.n o(-+rjke ts 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 wize h/4+ovv 3pwres placed side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field z v+w3h/4po evat the point exactly between the two wires

  Two long parallel wires capr)0 0ykd9pe trry equal currents. 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 therdk)tp 90p 0ye two wires?

  A long straight wire carries current toward thhswq -9ky 5db6e east. A proton moves toward the east alongside and just south of the wire. What is the direction of the h6bqw 95- yksdforce on the proton?

  A wire lying in the plane of the page carries a current toward the bottom ofios8 jv(8i* lq5mkfdvxl:4,7 /i cdvc the page. What is the direction of the magnetic forc/fm:d,vik84qvci7 l 8 xvoj 5dslci*(e 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 f)it5 lzl)c, iplaced side-by-side on a horizontal table. If the wires carry currllfit)5) iz,c ent in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If theph00tld n+am5 wires carry current in o+la nd05htm0p pposite directions,

  Consider two current-carrying circular loops. Both are made frod2* 7uh -cbhizm one strand of wire and both carry the same current, but one has twice the radius of the other. Compared ih z2b-dh7c*uto 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 cir06cjxgaz(l4 dos9ap(e +h9r1iggra(nc sz23cular loops. Both are made from one strand of wio(4z3gr6g+9 ( jhdgn92s lx0aapa(1izsr cecre 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 larger loop is

  The maximum torque on a current carryin )k(./by3fgc sv wf(odg loop occurs when the angle between the loop's magnetic moment and the magnetic field vegk/ vfof(y.(3dc)ws bctor is

  When placed askew in a magnetsvd/mf5 w.j fl4zanc:aw t4 40ic field, a current carrying loop that is free to rotate in any direction will experience a torque until its:m4 tf0wc jwva4f4adn./ 5lsz magnetic moment vector

  What fundamental fact underlies the opoyowzhd ; yq,);x+ qu6eration of essentially all electric motors?zqo +y)6w hx ,yqou;d;

  A circular wire loop lies in a horizontal pl7x1yuvhtnq )/ane 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 inter7tu/ qyv)hx n1action with the magnetic field?

  In a mass spectrometer a particle of mass m and (oc urued.5/h-m5m o8- ltcp :5ap wukcharge q is accelerated 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 perpendrt wk- uou.oum-mp 5: lc8e/c5a(h5pd icular 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 part,cc6d:g cipau2m1tpn8 y* w*jicle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directioycw c8ugat1dc*n ,p j:*62mpi 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 carryingmf- hwky - 1wkyt(1zl8 a current of 0.60 A is oriented parallel to a uniform magnetic fiel(whyw yt-8zk1-m 1 flkd of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curre;*ebam;f.be lt*7 vjxx 3m)ej qark (2nt of 10 A in a direction 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 awpk5ia,gdn/pw y( e 1+kfx9.t straight wire carrying 5.0 A when it is placed in a magnetic ,+(pg /e ykw9.5 adp1k ftixwnfield 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 bc0 otsl39 xt.mass of 0.050 kg and is in a magnetic field of 0.10 T. Whabx.tst o90cl3 t 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 magnetic field of 0.20 T)a4ve6f5 66kt0vr bte febpxmab87 f- . What is the magnitude of th r0tvf6k6ta-6fv b mepx b ae)f584be7e 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 spee5nqsb1r .l7a wd 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 oflzs3yw,xuz 8l;2 kjo : $5.0 \times 10^7 \; m/s$ 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 w0eumog7 qq*bn g kb6 gbi35,myu34,duith 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 wimxfw .ib71xf* th a speed 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 witj d-n2n3 :kauxh a speed 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 myjy09c i shy8a//+ 9pcge2 hw$3.0 \times 10^6 \; m/s$ 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 iq dgs-n ;v83vfs the magnitude of the magnetic field at a distance of 0.15 m frg ;s-83 dvvfqnom the wire?

  A high power line carrying 1000 A generatqqi9*xn. 4hcut * p *iif2b7hres what magnetic field at the ground, 10 m b*fx pq2* iih*r97cu4nthqi. away?

  How much current must flow foho) +z3qov(3gv+lcr rr $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current *; t5ss.l ;qlxvatf5 iof 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Ea l*5f .qttlxsai5 s;;vrth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions 5x.d jk1oxg bnw:pnkns,77f-j9v . hk. They are separated by 40 cm. , o-j..57:jkwkpgvxhn7n9n fxs 1db k 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 oeqq ) m1dpp37xf 20 A and 5.0 A in opposite directions. The wires are separated by 0m 1q 3p)pdeqx7.20 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 i7 7t3 vj.)l+5ko6uwhyu tb4fhuoog1 directions. The wires are separated by 0.20 m. At what point between the two wires are the contribu1h7 yti o6+jkwv7htfugo.5oubl3u 4) tions from the two wires the same?

  Four long parallel wires each carry 2.0-2q wu* j+xp1l jhwb/q 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 field does one of the wires experience due to the other wwl q12h*w jbp+/u jq-xires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A i p5sjicx0s+2uy2d7e /av j-qun the opposite direction. The wires are separate-52s/yu +d isp2cuxqa v0jj e7d by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the c0jk-4ory x9(izl zc. menter of a circular loop of wire of radius 4.0 cm whr4iy( lzczo0m.-x j9 ken a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. rt b7t u-wq7h/snewdw2.:,u)p drqq+3 :o oesWhat magnetic field is produced at the cente2b7us,+:-3rt h:wqdwtdsewp) .noq7o /q u rer of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.1a09m9qs6agy bdn6*sqd ,) nvz0 m long and carries a current of 4.0 A. What strength of magnetic field wi6,na60 a zm*vqb d9ysg)n9sdqll it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to g h/zpjx ,g(rq)enerate a 1.0-T magnetic f)xj(gr/zph ,qield at the center?

  How many turns should a 10-cm longuc) nxt-pt hgu8o, 83v 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 that p o:- +vpyj;x.ne(mvicarries 6.0 A if it;npv:-x p+m ( o.ejiyvs dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of e sdi86;67)ng0 ;amau6st vc,eyetkyj2 i*op0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendiculam6;ky*e0,pavt 7ceu)i;6 sga2 6deos in j8 tyr to the magnetic field?

  A circular loop of wire of cross-sectional are1,r2txk)zlo p6rf vj)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 magnem iq/5x26l7 ,kz dlnoftic field of 3.5 T. The loop haskflxd6 ,2 m7z/o5ilnq 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 0.30 , g*no 1ag,au1arruxtpl1 z4 6T. The current in the loop is 2.0 A. What is the magnetic torque when the plane ,4r l og1nupz,a1axa1ru*6t gof the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fiellgp tlhql/t3;b( k x:/./l ttvd of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque tk. :pqlhlb (//vt x /tt3;llgwhen the plane of the loop is parallel to the magnetic field?

  A circular wire loopy en2-)0dka(fsn 5,jdxqw;cbwvg b : 9 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 (charge e) has g en.fdhjorm-h 8,)wuwntoonl8 ; /8*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 qa j.j hsx(cc y7h5m11velocity $6.9 \times 10^6 \; m/s$ 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 :uw*onk /yye5(rm 8yz a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of tky*uy:/rze (no5ymw 8he proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It entermm4q9q 5kz4sysy/d+kn,sq2ymv a t(*s a magnetic field of 0.30 T oriented perpendicu4snk, my/vz k5qqd 9+ysa2 (ms*4ytmqlar to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential diffe1 c/yhbetfx5yfa - 2mz*6f)furence of 10 kV before entering a velz 5u tff61bcame/fh*2y - yf)xocity 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?