If the north poles of two bar magnets are brought close to each o lz7t fqgg64(3ekl:r-c/cs xzther, the magnets w:(lz f/tq3clg4crkx -g6z se7 ill

  If the south pole of one bar magnet is brought near the north pole of qh,chj w75-fd 0xz (guv6el; na second bar magnet, the two magnets w(7qchg zw;u dh0n6ljf5e- ,xv ill

  If a bar magnet is divided into twqcw-i ;iv+ 2xzk;mq. lhw9 q:xo equal pieces,

  The Earth's geographic North Pole is magnetically 2nh1(c wrl rpsbb :t; qo1s0hy5hc2,ba

  The south pole of a magnet points*;g-f8 vepswwf ,b)e a toward the Earth's

  An electric current prod:hvmdq.l 6z l/pw ut5-uces

  Which of the following is co g 5ler:ia)id3rrect?

  A vertical wire carries a current straight down. s9xru-8zp48s 9ogmdg To the east of this wire, the magnetic fie8zrsxupso9 gd-4g m 89ld points

  A horizontal wire carries a current straight towardjuvl4q9w.a(1g:(attnhb; 19 ktyy fk you. From your point of view, the magnetic field causedttnk1 ahbfqy; k(a .:t1lgv4y j 99uw( by this current

  A current carrying loop of wire lies flat on a table top. When viewe*bkzo4;t8xc0 huo z6 vd from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetik8t ob4*0 hzxoc ;z6uvc field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. Whh g i)op9phd0-en viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field ciod) gp-p9h0h aused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fiel0lqo+fqcb 0c n,n0e h8h ec ogkts;,6)d is the

  1 T is equivalent ton2 a rv6fal*xrjr2):n f4(vig

  The direction of the force on a current-care l3/f4wm.jq q/xk:g erying wire in a magnetic field is described by which of thml /qe:w f4j3e k/.gxqe following?

  The force on a current-carrying wire in a magnetic field is the stronges2 7rd3gv-g(6jeduvook+cb044iggr (b y8u qu t when

  The force on a current-carrying wire in a magnetic field irme9n/myg2+ x:5 fdsas equal to zero when

  A vertical wire carries a current straigh7qs :kmq ww1m+t up in a region where the magnetic field vector points due north. What is the direction of tqk:wm+ s7w1qmhe resulting force on this current?

  A charged particle moves,d p 8fupg0jmva1qadgxu t9r79vl,2) and experiences no magnetic force. From this we can conclu 20)uj 7 1x9fpu8mqap ,dtdgvv9,arlgde that

  A charged particle moves with a constant speed 5 aj9rj)a8wt eed h6.gthrough a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle tj a8gr5ahd6e jw). 9ewill be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic forctgp 08a)qeujo6--d z we on 0e o-w6qg atj)z-up8dthis particle

  A charged particle is injected into a uniform magn7v5ne 5vjl*ku:ein p) etic field such that its velocity vector is perpendicular to the magnetic fieldvln7nvup5 i:)*5ej k e vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveloof4rk- i r6aq8 pw1b6ing in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path 8qfr 1p-wbri646o oak would be

  A particle carrying a charge of +e travels in a circular path in a uniform m+-el0x l mhds(w 82nsfagnetic field. If instead the particle carried a charl 20snw-m(+ h8s lfexdge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves east2oj n(y*d3+smxdwpb*h;; vl)ik-* m jilhid6ward at speed V in a uniform magnetic field that is directed straight downward. The magnetii hk i3+;mwj6n)dv;l*lios*xdpb y h d2(jm-*c force that acts on it is

  An electron has an initial velocity to the south bu/z6j i u*b1oijt is observed to curve upward as the result of a ma 1iji/*u obzj6gnetic field. The direction of the magnetic field is

  An electron moving along the +x axsv. m / 0/ oav1 q-pulcfb+v+3pzjdj5wis enters a region where there is a uniform magnetic field in the +y dirzp- o++u fwj03/vpv /1b vmjd5 s.acqlection. 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 current-carrying mg nzka;/bxpb-6 i(.cwire is

  At double the distance from a long current-carryfs3zpfe0*ak ( ing wire, the strength of the magnetic field produced 0af*zp ksf e3(by that wire decreases to

  Two long parallel wires placed side-b 6j mme,a68fp 1s5qcqty-side on a horizontal table carry identicalqa68,e mm 1fsq cpt56j 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 between the two wires

  Two long parallel wires placed side-by-side on a horizontalix)bt:+g. wbfg wt)8-nrqr*l table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the two wt .w lfgn8 w)bx*+r ig)-:tbqrires

  Two long parallel wires carry equal cgcos)peyo:650soc6 quiap.y3 )k 6m yurrents. 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 two wires?6s6o3yoo6e)spa p gq u c)c.yim05k:y

  A long straight wire carries current toward the east. A proto jvtt(bak)z- go4pqq x 3d;o16n moves toward the east alongside4 xvtqodqz(-ot )g3b;kj 6p 1a and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current towardzf*d8ds *xj;r0bcil i ix:. y5 the bottom of the page. What is the direction of the magnetic force it produces o .y 8xxzibi;di0fls*r*jd 5c:n 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 hd(5)j+wsr j/*5 lkhf ylcp v68.s4tft*isl b porizontal table. If the wires carry current ijbp.jfsl5vs4 6lf)tcti pr5+w(*8 hsld yk*/n the same direction,

  Two long parallel wires are placed side-by-side on a horizo) )q7pb2fzob 9x+yf9dh3(ex* x yknwl ntal table. If the wires carry current in opposite dib(xqd+x)epf )y*yfl73wno9hz b 9k 2x rections,

  Consider two current-carrying circular loops. Both are made from onepxrlqnvh10 p qz( z210 strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field at tqp1l hpx0rn1q0v2z (zhe center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Bothju)z8r w )9q/5dq rvy2w0t++zlmr q mn are made from one strand of wi lwm)8r 2z juqdm+qrn)r5twq0z9yv / +re 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 ongnoq6jpjrjc1 .-1ysxdx9zk 2 epi-o9 2r1z x, a current carrying loop occurs when the angle between the loop's magnetic moment and the magne,s1pqxnkcp1 6.oj1yxezj9 ji9 --22zro rgxdtic field vector is

  When placed askew in a magnetic field, a current carryipse (,2,v jfys,x8zl ing loop that is free to rotate in any direction will experience a torque until its magnetic mp,ysx v ,l8fizs j,2e(oment vector

  What fundamental fact underlies the operation of essentially all e;o7)c2xgtzfy dvmy4( ( ch ;rtlectric motorszdrm hxy2(7(fg 4vto;cyt;c ) ?

  A circular wire loop lies in a horszi:.qa 3 nh;gizontal plane 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 t:hg. qzasi; n3able 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 accelerma lsl8.wa)zj, nk-o 7pmrnq7 f86df+ated 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 oriesr+z .d k7m f76j a8-lqpno8wl)mfan,nted 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 through crossed eler: 6azjkaf4 92 ns+6q2ydqee ictric and magnetic fields. The forces exerted by these fields are in opposite direc r +4adeiqsjfna2y6 :kq e96z2tions, 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 oriented parallel to a unifor )mp /i uxn 8:prs*huz,ps1+hsm magnetinis8)ms ,h/:p rux p 1*us+zphc field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directb6k*kw+ss7ch - r6;tc xag*pjion 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 5.0 A when it is placedav(:akt f/ v)c in a magnetic field of 0.020 T? The wirt af:v ()kcav/e 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 and is in a magnetijby;c+5+zt)ih8 o(;h : lu evhigexz 2c field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel thieyiuzl+z xoh 2j5(;tg :)h8bvehc;+ e weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. Whaxnkgm s2ql.0y+.e hc4t is the magnitude of t4xhlye2n+. kgs c.0q mhe 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 withnx s 5 cd*uvs10,-s n.et2iztq a speed 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 29d walq : k3r(b(9v vz)z p;mzfk2idwspeed 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 northn+7d )yj)d)ha*r;c cqbz .kw pmv*d 2w 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 o;ntx6jr 5sd80s +nogff $8.0 \times 10^6 \; m/s$ 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 s1x.gb an2o 84*jk urlhpeed 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 e.c i :g/szpmfxff56 z:n la9/of $3.0 \times 10^6 \; m/s$ 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 w3p t+.u )uvqawire carries a current of 25 A. What is the magnitude of the magnetic field atqav)puu. +w3t a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fizfg 6v5aaov; 7r o64yheld at the ground, 10 m vo5h67;4a ofv z ayg6raway?

  How much current must fp*s( uy8uydp9. t v*wrlow 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 wire carrying a cur3z9gsg:pou92 o 87pzho.q brkrent of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic fielduz9qpk7 . 93:s82ogp oh rgzbo of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. hx0;k8o.0qpqrdk g:hcs, 6j )sba z/z They are separated by 40 cm. What is the magnetic field in the plane of x);0 pskoadzk/z8 gqh.6r :j,qb c s0hthe wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires car* skdzd)sy */try currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magne)stz *k yd/*dstic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in iunzs3tes2 bj:2x0i4;mqn ; h opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the4i:sun z; 2;tq 3mns0xieb2hj two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. The5t:/ h c 5qno7c5 rgs el7ujx9,mqsha(y are parallel to thesmu5a(5xh,79 s7oc :nqeh/ gl5r cq jt 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 wires?

  Two long parallel wires carry( pe l;y 4alb0/fukc qwcj2g), currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force pe/, 2pywf a jc)gbkl4q0eu c(;lr unit length between the two wires.

  What is the magnetic field at the center of h5ve e9eul i5ly-wwy c9g,b5 :a circular loop of wire of radius 4.0 cm when a current of 2.0 A ycgl- 59 ie 5ybe9u:vhwl,e5wflows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What mb2 m5gwj.hhtbocr3j7p0l q /( agnetic field is produced at the center of the sol2h5 bqj( rmcl.g jt/30ho7wpb enoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carrie tg:1r/tfj a0i740 mzn fi1enes a current of 4.0 A. What strength of magnetic field will it have at its cef0i10 znf:4 ng 17att/ierj menter?

  How much current must passax2 0y: 1od5cvro9s;atgs0x l through a 400 turn coil 4.0 cm long to generate a 1.0-T magneticsy1t2 oc:a9x0oxal s ;gd5 v0r field at the center?

  How many turns should ajjplp j,mms zg 4a9712 10-cm long 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 rectangula1,:cwu 6uh sdir loop of 120 turns that carries 6.0 A iwc:hdus16 ,iuf its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unifarclpkb44. fn-mwv,:orm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque w brnc:p,l v4f.k-m4a when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional are x0k/.uc 5dohsn- /vspa $0.12 \; m^{2}$ 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 magnetic fiel+gw1k,g8 gr3znl6qggd of 3.5 T. The loop has an ar3r6g+81glgkz w ng,q gea 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 ih)k2d8pv4wc n csu*(x( *:dzutxkx7ws in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torq 7ku) duwt*pksxh(x *zcd84xwc(n:v2ue when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.7bta l ( 1hsjxi3us,rjl w1e),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 when the plane of the loop 1str7ai, ,j3ju)x1le(bw hsl is parallel to the magnetic field?

  A circular wire loop of arejhs (qv*rwz; j:trd(;a $0.25 \; m^{2}$ 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,hbe)me f/kq 4 bfjbb9 *c1:o.zk,p6yn a single-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 wilp -y(3d- jw4ffzd41a 7y kadxth 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 a potento*c1 acc+,o9 snpqtj ;ial of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the ras91+c oan cq,o*jpc ;tdius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic vwj+mswucg/dny. 1 ; 8field of 0.30 T oriented u8d ww/ jgnv;y.+s c1mperpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a p+oq; +asw jdk6otential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selectoroa+ wj6+kq;ds has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?