If the north poles of two bar mag8x0/l0o sd; vte3vmnw nets are brought close to each other, the magnewm0txsev;/3d n 8lo0vts will

  If the south pole of one bar magnet is brought near the north pole of a s-f7jfy36jju ds x axs/c /6y/lt/vcz-econd bar magnet, the two magnets-/6stlj 3 -6 d/yy7fa /sfcxjz/vcujx will

  If a bar magnet is divid7 yf+j,a8r jvwimk1yj0ks (-ked into two equal pieces,

  The Earth's geographic N*o gdmj;v r/d7xrql36trs7 (eorth Pole is magnetically a

  The south pole of a magnet points toxijzf1nk +90 fward the Earth's

  An electric current produc,d ec7:rxh, 2-ak0pl1da xdvvwi; b0r es

  Which of the following iskpm,63;h 4 /mj bi(zby/pi.p/odfyhr correct?

  A vertical wire carri+72xpm ek j,4yzjche/o0 k ax0es a current straight down. To the east of this wire, the magnetic field poiny z0 4k,xexme+k7jpoh 0/ja2 cts

  A horizontal wire carries a currentv) puwp*ad m * jhsjqv/sy1 k/v,j-,m- straight toward you. From your point of view vpskj* -h pj)uy,vdqv,j//*ms1m-a w, the magnetic field caused by this current

  A current carrying looev bqh5nvn-5 hk/g;k.p of wire lies flat on a table top. When viewed from above, tv b kvnk;hg-heq./n55he current moves around the 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 circuyzb2 bfqcg3lh udb8c 6i:p-+3lar loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. Whc3hq6b 3gd-2l f +bizy8p:bcuat is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fie9xh g0ban89 fpm 33ignld is the

  1 T is equivalent to e1m kd38+g )llge(oor

  The direction of the force on a current-carrybd,nrzfg.s; 1qy:h- ping wire in a magnetic field is describedhgdns,;fz- :. 1yp rqb by which of the following?

  The force on a current-carrying wire in a magnetic field g8f,)iz e /lkghe*jp1 is the strongest when

  The force on a currenvjrde 4 fi-jsdjc3d4/q-q 2y 3t-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a c4wnj4 , lvyqb)urrent straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force oqbnlj v)w 4,y4n this current?

  A charged particle moves and experiences no magnetic force. From this w8txl6kn twgz idq h:6wq3+b+0 e can conclude that+wtlik+gq6tx0nw3bd:6hq 8z

  A charged particle moves with a constant dcxvik-zh 44t4 d j5m;speed through a region where a uniform magnetic fi4d4xv kjimch- ;45tdzeld is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. T:7 q w6f9cavlnhe magnetic force on this partifql wn 9c6av7:cle

  A charged particle is injected into a uniform magnetic field suchxj +kk+,.mz+v oepz k6 that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the e,kz .+oj6 zmk+vxpk+ particle will

  A charged particle is observed traveling in a circular path in xik.rka b st)2)qbj7,a uniform magnetic field. If the particle had bee)bs)ai72kbxqjr ,tk .n traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular pa )sclupk9tvnmag 3*)(n oi9 .cd v7o9wth in a uniform magnetic fi.3mwacn9*pid u) 9 l(kn)v7 s9tovcogeld. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward+yrpx15 xj sfegwcnxo9,u.sw i(7( m + at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it is9 , +g m. ox(nc1x+u5ws7yrwp(sifxje

  An electron has an initial velocity to the south but is observedc15gsz /uxu:wk 6fhzp2v35mz to curve upward as the result o2/:z wcv6ump5 h5xkg1fsz 3uzf a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis endit*n-toc ;a)rl:tm. ters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on m . -t:da*tc;r) iotnlthe electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight curren4grum*mh s9+9 3 i7 s8oeeilcmvk1q8at-carrying wire is

  At double the distance from a long current-carre+w:t /d 4s igpez(c d3i(tbn6ying wire, the strength of the magnep 63(e bigsdetinw4(t: /d+zctic field produced by that wire decreases to

  Two long parallel wires xt x6 afow5h0qp/5 l.mplaced side-by-side on 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. From your point of view, the magnetic field at the point exactly midway betweenp 65lxw qxa 0tfh5.o/m the two wires

  Two long parallel wires placed side-by-side on aw6tc+z d/g8a bs 4qlc3 horizontal table carry identical currentc8 sqw /4z+6al3 gdbtc straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitud4h7oozvc0jtbuj+ vy(fia9 .,d -s+fhe of the force between the wires is F. y4shvj+0ohbtcuf(j. 9 od,f7-av +izThe current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A pa/t,blzpu ak-:vu0vun d) a ,:roton moves toward the east alongside and just south of the wire. What is the direction of the k,u)a :u v ,t-/adnavzlub0p: force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom 0w,yr +n b:tzxl0xgn+q 9 nu1fao3eg-of the page. 0nn,ruwoxe bg9 a+ fxg:+qlzty 0-13nWhat is the 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-by-side on a ho gxy(pv6a e+a;rizontal table. If the wires c+v( e;yxa6ap garry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. Ift35sdvwe * zy0r(5hhi the wiret *hi53vzdyw 5rs0eh(s carry current in opposite directions,

  Consider two current-carrying ciu4j (eeam+xvu :k8q +rrcular loops. Both are made from one strand of wireauk eq:u(8v++em rx4j 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 the larger loop is

  Consider two current-carrying circular loops. Both are made jkg 0cd-s2jw 9from one strand of wire akj 29c0wds-gj nd 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 carryingolw,e crn +2udpyt ewvj 4:xdd98 6*in5,8xkk loop occurs when the angle between the loop's magnetic moment and the magnetic fieedep,xcx l *kd 8wtnor94wv ,d+2jin8 uyk:56ld vector is

  When placed askew in;p :bsae6y:s v a magnetic field, a current carrying loop that is free to rotate in any direction will experience a torque ey:: bp6;savs until its magnetic moment vector

  What fundamental fact underlies thear+k5i/ne0t 1nq *:sr m 9shjl operation of essentially all electric motorslnk 0tm q1/*h:rs 5near+s ij9?

  A circular wire loop lies in a horizontal plane on a table and 7a use3nu -) ho* *khop+k8qrfcarries current in a counterclockwis)e3p +fh ou78h*k nuko- *srqae 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 with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated througjsdx -9**,pac4 fdgl eh 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 perpendicular ga49,*s*fj-edx ldpc 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 crosserejy:8o6g0 rt p),- gs 7jvlhc;ns2d ed 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 eg:d j rrhes; 2jes,vpn6g0y-8c)t 7 loast, and the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a cu+x9f/ft j mt,crrent of 0.60 A is oriented parallel to a uniform magnetic field 9c,tx + tj/fmfof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A icw(g vf,4 k)*i8 jhvukn 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 a strl.jg wot6maebxs6, m::p:x z :aight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle 6s lx: mazp:w gmo:x.,t6bej:of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long dnw41f5ih ic8 has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod i 5hfiid84 c1wns needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a unifobgej-j10e:8s6p es s,c/ u5bjty6b gj rm magnetic field of 0.20 T. What is the magnitude of t051- gbj/st6 pseybcje,sj:b u6g8 e jhe 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 spdq :dha*9gpf+ a,nrrl q (rm4/eed 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 sa hj (ft)nu /z)vz;8hopeed 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 witkd6le yz/-:y5xqjc - ph 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 speeccqs:mum3n u:mc n1bkrn5fy: 44l1 :md 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 speed ovka y1k, vb7e k:u.fv4f $8.0 \times 10^6 \; m/s$ 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 9*-x31jeav ofdt za2fof $3.0 \times 10^6 \; m/s$ 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. Whmvj26)je)5ub w), doeuuqtx , at is the magnitude of the magnetic field at a distance oj2)e ub6 5uo,d w)et uvx,)jmqf 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field :id+brzj+d0 cn6 f4edbhw1 i,at the ground, 10iid +,j zh0 f+ 6cd1brnd:b4we m away?

  How much current must flow for4bii rafmk1(y39nf * :9l jxw x0to2gg $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a ctj 3 iqc iiuc2lz27.j, kqd-a1urrent of 5.0 A is the magnitude of the maqc,ju1z7.lc id -a3ikjti q 22gnetic 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 A in opposite directions. They a0 fz.0s/kzjm dre separated by 40 cm. What is the magnetic field in th.s 0zj zk0/dmfe 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 of 20 A anzl b0zg (l.q)qd 5.0 A in opposite directions. bq(.zl0gq)l z The wires are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires /ky r*x2 *t9ogchh+ye carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point betweexh9orgy t*ykc+/ h2*en 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 k4jsfv 92fj+xq5zrf6 are parallel to the z-axis, and they pass through the corners of a squ925s6jfzk vjrf+f x4 qare 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 5.04u-b.h; 7e pig3cubjc A and 8.0 A in the opposite direction. The wires are sepa cecb ijbuhp 7gu4;3.-rated 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 radius rpi3u.kse 6w k7krp8/ 4.0 cm when a current of 2.0 A fl8 k/kksru6rp 37. eiwpows in the wire?

  A solenoid 20 cm long is wound with 5000 turns oh4 fm /rhe27tof wire. What magnetic field is produced at the center of the solenoid when a current of 1/r metho7 hf420 A flows?

  A solenoid with 500 turns is 0.10 m long anr ; ttn9delpp-yo089nd carries a current of 4.0 A. What strengt9ne t9 8ol- r;pn0pdyth of magnetic field will it have at its center?

  How much current must a; v-;bhywqk:pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magy; qkw:bvh;- anetic field at the center?

  How many turns should a 10-cm long solenoid have if it wu2mm1tb88 f lis to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a9 c:0kkuqz: nu2eow( c nllqz2. ik28o rectangular loop of 120 turns that carries 6.0 A qluo20u 29 k (ne2c nk8.ckzliwqzo: :if its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire o+tznm*f9 uugw32a :0rwu;yvi f radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Wha f w2+u rum9:wa ;inzyuv*03gtt is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional y1r ey 4tm2c-pa-:v vnarea $0.12 \; m^{2}$ 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 carr6v/(ft )kgd4 3e g(eezyjzej 2ying a current of 2.0 A is in a magnetic field of 3.5 T. The loop has anfedj y4/ kzj e(3(2tezeg)v g6 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 unifor1*xod9no ve 5sm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when te sn 95*o1xvodhe plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 06 uzef 5ri6tg7( - dshyuw7w0v.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the m6uu t0wh6frd5sw ei7-g v( 7zyagnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of a qu14fe+ah- enrea $0.25 \; m^{2}$ 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 a sleen .ih,/5y v2wyg:so /.vbm peed 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 5g-d1 ; uimcyj(0cazwc17dy twith velocity $6.9 \times 10^6 \; m/s$ 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 o; f f*p0wso0ya potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the ra;00o* fswofpy dius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It ewc05zrwy ,v*e nters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path itw0,rc z5 wev*y follows.

  A beam of electrons is accelerated through a potenti8nq6 r ol3t6lial difference 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 par66q8i3l nrtolticles are to be undeflected?