If the north poles obkgkt8: 8 f6fimpwe ld9/ s:t5f two bar magnets are brought close to each other, the magnet5m:w6ptfk8fges t i8k/d 9lb :s will

  If the south pole oflwqh0hxuk+bnol1. gd 7 p*1-w one bar magnet is brought near the north pole of a second bar magnet, the two mag xh k0.d-bw1*7lgp qn+louh1wnets will

  If a bar magnet is divided into two e d+9; a*obwpekpi0s,i qual pieces,

  The Earth's geographic North Pole is magnetically vy/r9v9 n- gq tfzog.sv(eu6 *a

  The south pole of a ma562m rev,ajq*6gl bpignet points toward the Earth's

  An electric current producesx);hdn;zdi 09eu*tlm

  Which of the following isaiueebbx ;arq.) jq kk; .3:5n correct?

  A vertical wire carries a current straight down. To the east of th4tj4- h cls) -eeok+kcis wire, the mag4 -h+oek-lj ec)ts4cknetic field points

  A horizontal wire carr n42k qoosiw7fd.6*b ; evl:ijies a current straight toward you. From your point of view, the magnetic fieldqe6. os; wldb *jk:27i4ifvno caused by this current

  A current carrying loop of wire lies flat on 4 xhy7uf /o ya+njhvftk47g0irse./1 a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the gk4 uj n/e+hf/ 0yar4ovfyx.t si 77h1magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of w/*zfji2 t;,bov juds87l*prn apa v5:ire lies flat on a table top. When viewed from above, the current moves around the loop in o / ;2a spartz,n*d7 :v8vujl *ifjb5pa counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic wj/ bq.ihi -a*field is the

  1 T is equivalent top78lx h1d .aqu

  The direction of the force on a current-carrying wire in a magnetic fg74fqskz9 e +4 3ka)2bkswhwv ield is described by which of the foqes7+ 4g)hwfkza2k4bwvk s93llowing?

  The force on a current-carrying wire in a magnetic field is the stron:*kh*rsr3mpm(:7p lkik gb . 0bmyhu 1gest when

  The force on a current-care*r pipb r:xiv6i-)m+rying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where theo/(i f: ks 4(zdws1yb azl/8pa magnetic field vector points due north. Wh(a/z(zyp8sdaf1 : kio4/ws blat is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic7mu *gh6hom)c force. From this we can conclude th)om7 ughch* 6mat

  A charged particle moves with a constant speed through a region wwvsxj - -e2 ol+d-e5pnhere a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this partis+ vnl2jo5ewep- -xd-cle will be maximum when the particle moves

  A charged particle moves across a constant magnet8cdefu4*7 t ciclv *k5ic field. The magnetic force on ttluec4 c5kv fd*ci8*7 his particle

  A charged particle is injected into a uniform magnetic field such that 1r vhg, m5erq fq,(of(its velocity vector is perpendicular toe,g oqrf vr1 ,hfmq5(( the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a unpk4mh6)x jt 9yr)c+ e95tywk-kk j,waiform magnetic field. If the particle had been traveling twice as fast, the radius of the circular4 kac+t)ej,phxr ky5j -)kmtkyw 9w96 path would be

  A particle carrying a chargen 6soc 5.yy(fm of +e travels in a circular path in a uniform magnetic field. If instead the particle carriyfosnc56 y. m(ed a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eam1. 3aps*wly8 vv;kzjr w(g)p9 kiv34inri1i stward at speed V in a uniform magnetic field that is directvn appy( kirm i 913 v48is )1gzlwwv;j3kr.i*ed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but i2k xai qcv)re7o.az-2 s observed to curve upward as t7.22 eck z)oiavqr- xahe result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +: rwqdv56sa,2;0wzrff9gpi 41-d z k;vdssogx axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magssa zdidovg4;w v-2pf6k: r0 ;fzdg1,wq5r 9snetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-cahu :lon/wbxs*hi d+65 t8t4tvyu p9f3rrying wire is

  At double the distance fromiw;/,d chovn 5vn1h9 v a long current-carrying wire, the strength of the magnetic fieldhc/h,9o1i nnv v;5w dv produced by that wire decreases to

  Two long parallel wires placed sitf1ykat 86l l43ln;)+up bnldde-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 3ny u blkt 1)+p6l;ll48dftanof view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wire xr-y6xa-lxxvhu5/r5b, 8fa js placed side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the poinx /l5vr - xuaxx5f rh,-8jyba6t exactly between the two wires

  Two long parallel wires carry er) qzwq a.qz49d zbfc*k(hy -1qual 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 the b1hdk)cq4w q- q*zzaz9ryf. ( two wires?

  A long straight wire carries current to2 7mcp.k ,jvl-/ ggedeward the east. A proton moves toward the east alongside and just southl e/cmkpj- . vgdge,27 of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the pageqdct*u3+bgw8+xa ui- carries a current 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 the plane ofu+i*-bwtq cau3+xg 8d the page, from your right?

  Two long parallel wires are placed si3j7c mw/e-n ib7jrxh a/6ycc*de-by-side on a horizontal table. If the wires carry curren n-c/y a7j7rbich xe6wc/3*mjt in the same direction,

  Two long parallel wires are placed side-by-side on a pca5k1z 4iop7w.+ opq horizontal table. If the wires carry current in opposite directio z+wa ipkp5ooq1c p74.ns,

  Consider two current-carrying circular loops. Both are made from onr6z9 5 pdxol7p,mum t:e 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, thr6,o9 pumzl7:5 xpmdte magnetic field at the center of the larger loop is

  Consider two current-carryiao1gt z dhrr(5e4a.k,ng circular loops. Both are made from one strand of wire ke.1odra h ( 4,z5gatrand 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 carrying loop occurs when the *7 wiv ra1pwrc0:gf9 sangle between the loop's magnetic moment and the magnetic fierrw a*w7fcsvi91p0 g: ld vector is

  When placed askew in a magnetic field, a0jyf6wdu k)0t current carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment veck wt)jd0u60yftor

  What fundamental fact un c2p*v. +m ziebak5fc:derlies the operation of essentially all electric motors?k*2c. bm5:z+faic pe v

  A circular wire loop lies in a horizontal plane on a table and carrisq: fa9wqy:cbvrcdz . 30pj/9es current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic f3azj: cpqs 9/:0 r fby.9wdcvqield 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 particlra3epzqzw )y* -/*:*ee vapqw e of mass m and charge 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 uniformp) *eawr3ye*wqav pe/q z*:- z 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 cow,ulu *e5gso.p f( v.snsists of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only pau(p 5usw.gl,ef . o*svrticles 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 oriented parallel to a unifor(sk /pq:eqb,t8ocxl1lz 7 j, kiqk3c/m magnet,szc/(l3bkkq x o jilek 8/q17pt,:cqic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a di178q 1d,o0 bif9t st0sf :njmcn:lmsqrection 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.vu9u 7xk,8,-h funrl8c n;qp c0 A when it is placed in a magnetic f ,p-kr9 un7;q,8vlcf uuhc n8xield 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 mxzb, /9bdf l9and is in a magnetic field of 0.10 T. What minimum current in the rod l,99m b/xzbdf 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. Wgb9n 0(ij nql dft7.vhaq7b.2 hat is the magnitude of the magnetq7l9ai7.gbt(qh 2d0. nvnf jbic 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 speed 2 dy9 dda5ti:vof $5.0 \times 10^4 \; m/s$ 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 tzj+(e:or b4kc-1aw ga speed 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 r dou*bfn 7iv (7+)kdf$4.0 \times 10^5 \; m/s$ 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 withh3 ;;1icc bld tgiomx 53 .by/fe.i7nj 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 with a speed of ,h8wzvbx:5 zhc*9 y6to slje 2k;dkm0$8.0 \times 10^6 \; m/s$ 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 ofnh-x. y9c z34 fm,5z ;cjtcyzh $3.0 \times 10^6 \; m/s$ 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 carriescr0z m r:3fnf* a current of 25 A. What is the magnitude of the magnetic field at a distanrfr 3f:0zn mc*ce of 0.15 m from the wire?

  A high power line carrying 1000 A ge i pea2wv3;23d0mozpanerates what magnetic field at the ground, 10 m away?;dp0wp33 vz a e2o2mai

  How much current must flow fodr - s6n+gi2utr $1.0 \times 10^{-3} \; T$ 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 u .ti(2j1 ioajy8*stgthe magnitude of the magnetic field due to the wire equal to the st a(ti1jut gs*8.i2y jorength 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 dijl;qo *(* xqtnrections. They are separated by 40 cm. What is the magnetic field inno*tj ql;qx(* 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 of 20s6/zjepdw +j8 A and 5.0 A in opposite directions. T pd zw68/sejj+he wires are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currentsfv nj92ql3y p) r.zko-hf y)+c of 20 A and 5.0 A in opposite directions. The wires are separate3qv2ry+ )plzhnj).9fyc fo -kd by 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires eac ,:- uqznfbj o -:4o+*0dlog oru7dmm/r v/yxgh carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square oxoyu z/v4d0+gmlm*:b7gd u n-/o,r qo-f:ro jf 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 5.0 A and 8.0 A in the g6c ol1.fg fz0opposite directil 1.cgzfgof6 0on. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field ergewmt;rwp7 cz +dd2)x fo)/ a*o* 5sat the center of a circular loop of wire of radius 4.0 cm e5f apr+ m tsg*/c7oz )o*2ew )xwrd;dwhen a current of 2.0 A flows in the wire?

  A solenoid 20 cm long tl/bw :iey n)*q7v fqx p3g+a(is wound with 5000 turns of wire. What magnetic field is produced at the center of n 3 ple/w7g)byx :ti *(vfqqa+the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a cj4n,s* gz si;;5fls fiurrent of 4.0 A. What strength of magnetic field will it have at its cente i,*isnf;s s;lj4z fg5r?

  How much current must pass through a 400 turn /k5lk4w57 af (rpr a35t9vvdnzpz 7bxcoil 4.0 cm long to generate a 1.0-T magnetic fie/ k7rfplaz4 pr5ta97z(vwdn55 3 bkxvld at the center?

  How many turns should a 10-cm long solenoid have if it is to w- )k*x7k79fska h q1fndm3cdgenerate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rec5dcg v3n b6wn+tangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 3+vd5 6gncbwn 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.373b1wht e5iu p0 T. The current in the loop is 2.uw7p h5ite13 b0 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-seo36mox0:knl lctional 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 2.0 A i0d1 (o - ;f*onrnwb5 iz6ggonis in a magnetic field of 3.5 T. The loop has an area ofno n 01(6oiogwzbgi *;-drfn5 $0.12 \; m^{2}$ 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 uni-4gqpfwc90n6js0 +vw7n )az rc8vjh bform magnetic field of 0.30 T. The current inqj-bc 7cvvn00nhpw f z4968 ag)s+ wjr the loop is 2.0 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 magnetic field gzwrazvv vo22m *vx+*;sgot7l *z1r3of 0.30 T. The curren *ws+;vv*ovr2 t*23 ov1 7zrzamlxgzg t in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop gedovo 4:c5 b8oj lr/5of 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- hz1bvctz.iep*b-/*d 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 wi w gnw:w*qd+:fth 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 thro;zz7pq7qigac9: *z clugh a potential of 1.0 kV and then moves into a magnetic field of 0.040 7 c;p7 zz:lg9*cqzqia T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters m ,6r;2k7c*nk royjdvno3r +u a magnetic field of 0.30 T oriented perpendicular tru ny6vd2;jc3n * ro7r+o ,kkmo its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerate2)t6 zt 8ipmdbzbsu+)d through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a v )sbb8i)zmtp2+tdu6 zalue of 0.010 T, what value of the E-field is required if the particles are to be undeflected?