If the north poles of two bar magnets are brought close to each o j+et u(tho9i4ther, the magnets wi9( +etojhut 4ill

  If the south pole of one bar magnet is brought ne ,pq 4vfcb-f5nar the north pole of a second bar magnet, the twvf,4 pc-qf5nb o magnets will

  If a bar magnet is divide6.: vprsah 7 oxvf6c2zd into two equal pieces,

  The Earth's geographic N a6-e :r/mxiewm 8mf+morth Pole is magnetically a

  The south pole of a maa- ht3*ijsl kqz;oz: *gnet points toward the Earth's

  An electric current prd 9(pzin/j6 euoduces

  Which of the followingcjm bke /7h h dc*,8txb*j8nehq38nb2 is correct?

  A vertical wire carries a current straight dowq mgzk1i-*s/ pn. To the east of this wire, the magnetic field pk siqmz/*p -g1oints

  A horizontal wire carries a current straight toward you. From your point3mq3q*onz s hj /u)y n101dcio of view, the magnetic field ci3nq y h*djz)oq1/num3cs1 0oaused by this current

  A current carrying loop of wire lies flat on a table top. Wh( j f9j)*fsn-gqcn-am2 n(x qu h78dnden viewed from above, the current moves around the loop in a counterclockwijf2ga fu9dj-(* x8cqn (7dhn-q n)nmsse sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular oibtus:8k 2vp1k4 v7xloop of wire lies flat on a table top. When viewed from above, the current moves around the loovktvu1 sib8: k2xo47p p in a 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 fie1is(hp:pzv(ck7m.d r ld is the

  1 T is equivalent toqc37a; kosnqo o;+-jap fj/q1

  The direction of the force on a current-carrying wire in a magnetic field is de 0ohmht5gx:67g j:2ps de vq1(nxhpi,scribed by which of t:o0ge27 mxipv, 5 gsq(dh:1j6phnthxhe following?

  The force on a current-carryl8bqq)b1b4w r ing wire in a magnetic field is the strongest when

  The force on a current-carrying wire in axc eo31f.h vv. magnetic field is equal to zero when

  A vertical wire carries a current straight up in.woy+h:nbv t)088wr ztbzt q gk,d7s7 a region where the magnetic field vector points due north. Ww,qtw7t7: sno brztby. +vdkghz)08 8 hat is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this fs:ak 7,oo6wlwe can conclude tha,fl7so6oaw k:t

  A charged particle moves with a constant speed through a ak1 *-sd49);rgr p4de roo;2ykahthbregion where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be aes ao4rhrbd d1 9;k4ypo2r hg;)kt*- maximum when the particle moves

  A charged particle moves ackicnsqn ):fj 07 ad09cross a constant magnetic field. The magnetic force on this p cfa09k0di )s:n qjcn7article

  A charged particle is injected7 9whpgmf-p6s*nns ;z into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weign;gpns 9z6-7fpswh*m ht, the particle will

  A charged particle is obr ;qzy;.cwd ;tserved traveling in a circular path in a uniform magnetic field. If the pd;rz yqc;w;.tarticle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a char )8qxf.do rxuwoub4tn f by755 kck;9+ge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the 5ut;ukfx+ ) o 7wyr q.knx8fc4bbo59dradius of the circular path would have been

  At a particular instant, an electron moves eastward at speed fgx wvd )xmdhbu0).,d 3l/3bx V in a uniform magnetic field that is directed straight downward. The magnetic forceb.d0d3 fxmh /x wgud lv)x,b3) that acts on it is

  An electron has an initial velocity to the south u.j: dkqs(f/o but is observed to curve upward as the result of a magnetic field. The direction of the magnetic fqf u(sd./ok:jield is

  An electron moving along the +x axis enters a region where thereyo ci2it *bq7z,3jz1n is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+3i bj7yctzo *n2i,z1qx to right, +y up, and +z out of the page.)

  The magnetic field produu;+;vr*4flz vwtvrp*/*k yxqced by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of thwj;z)j7i 2o -uu7w (y+k tizn*3hbthve magnetujwinkzihz( 77 v )2uty+bw-3;jhto*ic field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry identizi6snsud. : x(cal 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 exac z i6n.(:ssuxdtly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal trnsa+j7:e qjdtf;0 -kable carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the two +7 ktf ;e-rq:d 0ajnsjwires

  Two long parallel wires carry equal currents. The magnitude of them6t6+ wdp xsfq( i-y/h force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force betw66f/sit+xpd- wmq( yh een the two wires?

  A long straight wire carriek)ses) 9vk)n0zo6e ahs current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force o ahs)z069 eknekosv)) n the proton?

  A wire lying in the plane of the page carries a current toward the bottom of thu;y jpn ;1ah1me page. What is the direction of the magnetic force it produces on an electn11ajhup; m;y ron 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 horizontal table. If thyq.ihliu, :ip8 v /o*qe wires carry current in the same . /8ou:liiqp i*vq y,hdirection,

  Two long parallel wires are placed side-b- shoa f/nq (;qu uwbu m7c, 3:dw.jzbsb2)hn2y-side on a horizontal table. If the wires carry current in opa.n:f, dssh7n(q3wbuw2 b-ou mb)2qzj;u / chposite directions,

  Consider two current-carrying circular lo ejs4;ti4rrvh u2o (9hops. Both are made from one 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 smalei(9o4r u tr;hsvh24 jler loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. B: ) hmkb)u-xt8 qvqym2r44m gld m5kf(oth are made from one strand of wire and both carry the same current, but one has twice the radius of 8ktxry m5lv -mk)2 :uhf(qm)g4 4bdmq the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a cuw+tz u*2x y agcfmx(k b, 27s-deb*,vorrent carrying loop occurs when the angle between the loop's magneeuydsg mt+cv,x , b*(k -azxw2o b72*ftic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carr*j:t /gb(n nvhying loop that is free to rotate ivbjn( * :ght/nn any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electrichz 9 of73kv wygqgu,;, motorsuz v9k g3,7,yg;wqhfo?

  A circular wire loop lies in a horizontal plane on a tabler(s7k) n lf gkt( ,:zh(/xkrmo 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. W)x(r(,/z h(ksmf no kt 7g:krlhich 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 retq 28 8 vqzgxn+x .(buw5xu7.c; rtpof 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 uniform and oriented perpendicular to the velocity of the particle.5 rbungr ce2 8.wxx8+p(;uttz.q xv q7 Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consisc 6jvm4*y2. ( nqtvodlts 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 d(volt642v njcq.*dy m irected 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,+vdkwer/,jkf- e,o d* zetkl:-ia4g to a uniform magnetic,w,id : e-gzakor,te *4jk e/l-+vkdf field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 1 vi e-p3s0gd):r ezw;t0 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 a straight wire carrying 5.0 A when-:,lri y+mum9 s/pk tn it is placed in a magnetic field of 0.020 T? l:ky9imnpm/tsu ,+r - The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long7sicnht9m/4;jq ala.2 4eaog has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order forai4/c . a net7j4sgaq9 ;lmoh2 the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic f1krpee66y(w ym e.0xg ield of 0.20 T. What is the magnitude of 6w.gykr1ey6 xmp e 0e(the 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 speed of /)jo2b7 )nm/hvjpmtfl ld1tvv. 7 z)f$5.0 \times 10^4 \; m/s$ 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 wpmaet4qt-- 3a 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 withxke+bj/um ga vg)8u; oa gd629 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 sp0ist(cq i8 5ftr jlgrr*z,w -+eed 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 4aa tl9b0kt fers1 +b7of $8.0 \times 10^6 \; m/s$ 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 1l:djz,v lswb v4:k9j 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 wire carr8gn+nk 7 o3xskmt4 l.ries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wire l7k 3osnrm.8t+kx ng4?

  A high power line carrying 1000 A generates what magnetic field at the groundi*2oh ;pg061 ymsj)amx*q;vgsq lnq 5,xkf ;g, 10 m aw hg;q21g,o *g qv0xnymm;sk*i 5s;fa lp q6jx)ay?

  How much current must dvd n9nu27 wy-flow 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 current of x 6etpyanz6e+ akvuf(1o47cc (w27hd5.0 A is the magnitude of the magnetic field due to the wire equal to cepwha t1vufxco 7a62(kdyz +6 n(74e the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry cu4wn2nnltlay qs24+ r6. kj0nsbig k5:rrents 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 that is 20 cm from one w2rl gnni4w s2.n+0k tba6l sq4j:k n5yire and 60 cm from the other?

  Two long parallel wires carry currents of 20v+(y3 m awpt7g x8tnk9y30aa x/j8lyt A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnekyy tp8v nt9y 3ax3/atwj7 gml+ax08(tic field midway between the two wires?

  Two long parallel wires cabmpo,3 z,+2pc d/qcx,szd1 usrry currents of 20 A and 5.0 A in opposite directions. The wires areo,+ cmzcu3s pd b xz/p,1q,2ds separated by 0.20 m. At what 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 directioniqe 5a5y2+ nmoqr t-.f. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in them5f2-or5qnea +yi qt. x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry cma /c2w rzantru j0d9(2-b6 xcurrents of 5.0 A and 8.0 A in the opposite direction. The wires are separated6xt2z w r9d-r0/cub maj n(a2c by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the centersk cg)xq0pb-3jb h *h, of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flow, 0 jchp)xshg3 q*-bkbs in the wire?

  A solenoid 20 cm long *ia(1 f; nqcch u3a/ysis wound with 5000 turns of wire. What magnetic field is produced at the center of the soleq1iu ;c3(syf/n ahac*noid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. gm2 nvv*wwy+2f. j2nxWhat strength of ma2vwy+ wnvx*f.2m2nj ggnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.e7jou602jk d+:(pza 2gj fft j0 cm long to generate a 1.0-T magnetic field at the centef0(dk:oj jfaj zte72j6gp+2u r?

  How many turns shoul-/ps)j8 j9bzp4v:0;pjgulxzr 4 v j ied a 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 rectangular looph8eqsj9* ohmn l*x(u + of 120 turns that carries 6.0 A if i e(*qho+ 8smhxu*j9nl ts dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in up;yv9i03;c)qx m20iii yyqq a uniform magnetic field of 0.30 p;9v2 30 miy)yqi;icyxi 0qquT. The current in the loop is 2.0 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-sqgkb73tm4j3 c5: fy,v)kmmp. cm o8 ,:ekeow oectional 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 e1juu/8ck+xc8q7 o :l, t9ym p1fjm wavjgc)(2.0 A is in a magnetic field of 3.5 T. The loop has an are 7/e8mcwjy(1utmpc c x1glf qja:9,vk)j+o8ua 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 a5k 0xso-4zpbu1 xpt1c uniform magnetic field of 0.30 T. T1px1usbo zcx4 0kt-5phe current 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 loop of wire of radius 0.50 m is in a uniiun ntq z q7;:yims0,6form magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magneticnqun:yzq iit7,60; ms torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop n (6 *6 itzsob0 x7z8kswaxfpgdwf6h6p2ka 4)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 l9 q3bpxaxt8: 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 veloh/ qogl 6)al6pcity $6.9 \times 10^6 \; m/s$ 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 potential ooth h6c, nh8liav u*e* e*)ptpf6(h)of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resultht,f *hp6oua ch))lo6v8 p(*ieen*hting orbit?

  A proton is accelerated from rest through 500 V. It enter)29( x- olv:sn(txc hijfu:cis a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determi xvo-s(h9lni(2)f ctucji x::ne the radius of the path it follows.

  A beam of electrons is accelerated through a potentuhd w v42o6u6nial 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 particles are to be undefnu6dwv4 26uohlected?