If the north poles of two bad60 aqq(r(xtwjse)ik/b r3 lz-vx3j 5r magnets are brought close to each other, the magne6 xzqk e x5(3davwlt- b isqr3j(r0/)jts will

  If the south pole of one bar magnengs.+).y3wrel(),uknw +z wm agj4rjt is brought near the north pole of a second bar magnet, the two magnets willgejn n,w+.(m gu z).jya)wl +r4 wskr3

  If a bar magnet is divided into twy i3vr 7;dxb+zygqzey( vs-r*t :tn3v o39d* to equal pieces,

  The Earth's geographic North Pole is magneticalnlz /ajf uv5-3)waehsxcq*:/ dd9qr 8ly a

  The south pole of a magnet points toward the Earth'e/dlec jc 1e2.s

  An electric current produc3rzy p tn99s+n -*ep, qzkj3 wkal5az;es

  Which of the followi7t2lcj w8e//szy0hxdng is correct?

  A vertical wire carries a current straight down. To the east of this wjq iu/w qsk*)xco;.:2m+szor ire, the magnetic field pointsi qs. 2 *xzco/+sqo;j k)r:muw

  A horizontal wire carries a (wia)0xvain/ current straight toward you. From your point of view, the magnetic field caused by this i/ 0 va)anxi(wcurrent

  A current carrying loarn 2lltw:n1 ,op 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 magnetic field cau a,1nrwnl:t l2sed by this current, outside the loop? The magnetic field

  A current carrying circb-z: r. pws raxme(+: )ty0djaular loop of wire lies flat on a table top. When viewed f.ajmd :-ewyra 0)tzs: b+x(rprom above, the current moves around the loop 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 k wp9fgx ,6x by04-lbsg5cnb. field is the

  1 T is equivalent to-kcy le5zu/ r4

  The direction of the force on a current-carrying wire in a magne0nvyxiw x zk/o,+uh)8tic field is described by which of the followingw +i/0 uvoxxk)8 zhyn,?

  The force on a current-carrying wire in a magnejkgt h5w 1o9e1tic field is the strongest when

  The force on a current-carrying wire in a magnet im- ch0r r3i0ya4cc, p,1mgqn3xo,s hic field is equal to zero when

  A vertical wire carries a current straight up in a region wh - fzh)g1vyg2+ 3y)zrmppe (ypere the magnetic field vector points due north. What is the directiyyppgzv2 gf31p (+) mzer-hy)on of the resulting force on this current?

  A charged particle moves and experiences(, /bf(odcxxa no magnetic force. From this we can concl/do ,axcx(f(b ude that

  A charged particle moves with a co4ajq nvr( 8dpqo 2wt33nstant speed through a region where a uniform m wp(qj2r no3dq8v43atagnetic field 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 m/1 r ey 7xyu )t 9; +4di-zotyzhrlugkqfzi*7(oves across a constant magnetic field. The magnetic force on this particr/ x oz4gh i*;ue-f yz+(yq1d9tiuy7k )trl7zle

  A charged particle is injected into a uniform magnet+v zky.q k8n(,qvu+pv ic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle'+zk(v q+kvvp nq8 yu.,s weight, the particle will

  A charged particle is observed traveling in a circ+ tsov -e;of :txu5fgg4kx,9oular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the tgkfxo5-gxo, e;vs+4o9uf :t circular path would be

  A particle carrying a charge of +e travels in a circular path in a unifv o3u1c eykb7i*13h yyw+0vgxorm magnetic field. If instead the particle carried ac3 0y vewb3yvuiy17ogx*1+ k h charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at p l6 i(f* z;0;0r wrd2oq1ocgeefve;p speed V in a uniform magnetic field that is directed straight downward. The mf qev* gop2lo cwzdpefrri;; 1 0e(06;agnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curbhj+n k0:a38e:slsmyve upward as the result of a magnetic field. The direction of the magnetic fi8bhk3:n j0se+ ls yma:eld is

  An electron moving along the +x axis fp 65 wy1tpgp+enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to rytp+1f56 pwpgight, +y up, and +z out of the page.)

  The magnetic field produced by a long straig3q+t1tq//.p 0d1 -n dico tco.vsmetf ht current-carrying wire is

  At double the distance from a long curr xrgru,k7xirq)36j + rent-carrying wire, the strength of the magnetic field g rr3x6 i r,kq)xr7uj+produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry ident) 4ngj(9vd5xryq tf5mical 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 bym5rvx q ()54j9ftdg netween the two wires

  Two long parallel wires pl; c.w /b2zeq g6o6tm:.bovrrtaced side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the pt6:6/o .oqwerz2 cgrb tbv m.;oint exactly between the two wires

  Two long parallel wires carry equal currents. The magnitud :hgnkj +m 2oqn;t(sm fo.1c3r 6cy(ace of the force between the wires is F. The current in each wire is now doubled. What ymn1jtnc+26:c(;s h3m kroa( gcf. oqis the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves ty6u )y7bs,p 2 k eibizz,bxe:4oward the east alongside and just south of the wire. What is the direction of the force on t2szu4)yy ,:bii, p bz67 kbxeehe proton?

  A wire lying in the plane of the page carries a currenqvjoh-f. 1 e.zt toward the bottom of the page. What is the direction of the magnetic force it producz.fov h1e .-qjes 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 mcz7;1+ )xq6hydfyirbsc8 2q a horizontal table. If the wirescm 8 2yhif)sq;d76z1ycx+brq carry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal tassab;)7zicot(pg kv 6, m5sl4ble. If the wires carry current in opposite directp )il cso;ab6smg k5t 4v(,sz7ions,

  Consider two current-carrying circular loops. Both n(v7osf9h;7 sqrr ;mzare 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 smaller loop, the magnetic fi nf ss9o(vqr;7h ;zm7reld at the center of the larger loop is

  Consider two current-carrying circular loops. mx l-w tz558:r s:ifpin4z ywwo455vkBoth are made from one strand of wire and both carry the same current, but o fr 5 5wyz i4 inwk:vw5584tz:pms-xlone 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 carryinioe nn,m(ejjd2kzl1v. y o/5amq))h :g loop occurs when the angle between the loop's magneticmelm 2j kn.d 1 ,yvzh))nji/qo5e(:o a moment and the magnetic field vector is

  When placed askew in a magnetic field, a currenlb ho56p ml,*ht carrying loop that is free to rotate in any direction will experien llmhb* h,5po6ce a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all elect t 1-nhdoclpbk.v ) :-h(pois(ric motorsp-od:-k lih1vth(. npb osc) (?

  A circular wire loop lies in a horizontal plns(,-z1v fqek9;8t ebft/ lnhane on a table and carries current in a counterclockwise direqb /e 1nnkf;fvth8(,ezt-s9 l ction 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 e kmc33r)llpb2ix98 v 3ato 1jis accelerated through a potent3ea23to 9m cl )pxvrlkji3 18bial 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. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a chargsen-5,t0z /ll4fabkgq;x b2 ned 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 4k,g -lzb;l 5snen2f/qbxa t0magnitudes 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 o-rlb0e u 45uj; s3d6tndh )xhto a uniform magn n3ohb6-ud ex h0d5;sur tlj4)etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curdegj uii sge7w+841a9wy xi(,rent 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 o9:iezrp0 n2 xzrmm x;l):l;otn a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020m )pzle2ri mxxzo:: lt;0n9;r T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m lo1qc 2jcn xe(wwl-+wh9 ng has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum cur-cc9h1q wwje(l n+2xw rent in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton ishd (y -q:/v+zornxl3l in a uniform magnetic field of 0.20 T. What is the magnitude of the zyl(vnhxr/ :+ld3oq-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 9 v2cl0h k:2o9+pxoxy b 5ysmuyxp5d )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 z nay w11*dc6)a(a aqvof $5.0 \times 10^7 \; m/s$ 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 travelin rsrez-fd42s 1g due north 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 spebel mc/bwknv* 3 u3; zw5pnf:.ed 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 witentvq /r8)5vs h 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 ofth(,qkksnj/ 4eh* s: o $3.0 \times 10^6 \; m/s$ 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 wirjiszm-r8yy ,i 3 ueyc:h9; cw2e carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the ,u3c82 eyh srcmy; j:wi9yz-iwire?

  A high power line carryinru *fx /,9 0o qempa(ytdqadr76utk(t - pj11ag 1000 A generates what magnetic field at the ground, 10 m a1x-u(ua1a 7/do tark6ft 9 q(tpj,me dyprq *0way?

  How much current musi/ev.-x *+5qsy9o enktdq8 b xt 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 straigw5 n0x qi +;ekb+id;jajio) k,ht wire carrying a current of 5.0 A is the magnitude of the,w0+iqi+d;o e5 j b)nkk;ajxi magnetic 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. x va,--w*s4 wtsyqwwg2x; a0m They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm wsy2;s 0*aaxwq ,wm wtx4vg--from one wire and 60 cm from the other?

  Two long parallel wires carry currentszvltx.lwkg*pi z ,/x)0 zh2sb s ,-b0eizd y+( of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic f ,lle, -+zzx wgizpy/(0.2ks*i0sbz tx)vhdb ield midway between the two wires?

  Two long parallel wires carry currents of 20 A andl vh 18lq.edw2 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wires the sawv. dqh2l8 el1me?

  Four long parallel wires each carry 2.0 A in the same direction. They are parallsu5ng5bo )q0p ams.:,py cg d:el 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 experigd n0pm:5saq5 p y,:)u.obcs gence due to the other wires?

  Two long parallel wires carry currentx)kn.+cn ox9 js of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Findk+n)9 jo.xxnc 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 4+ gyw*yizz91 ovv2m ju4uaj3 ).0 cm when a 1yvjju)* oi9 zmz3w 4+2uvgyacurrent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound witpg6 :i*11lppxnlo +wi h 5000 turns of wire. What magnetic field is produced at the center of the solenoid w6i:xgln*lw1+p pp 1 oihen a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and cadq ,)hhl82:dkq ki9i7cbl 5u irries a current of 4.0 A. What strength of magnetic field will d l 7ki958iqk h:2ui,)cbqhdlit have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a n(fj 9ly(b+c,zw4s,:joejzg eax.4o1.0-T magnetic field at the ce+a4jyb,jos zw,4(xeof ejng(: l 9cz. nter?

  How many turns should a 10-cm long solenoid have g: 4v3ur6mhhoi n;i) xif it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment ld8d,ay0z57 vthpx *m of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are thyx05pzl,8a m 7*v dd4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fielg mx*dopfv ysw44b8mgv0zf wj45 7/ dv(-)iknd of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magneti/ip4f4djfg w 7zv 80sv4mm)b5yog v* (x-nwdkc field?

  A circular loop of wire of cross-y,* e5:k3u rq)3gzmo8woad kwsectional 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 carryinvox+o*nlkax p uukx(d,4*)5zg a current of 2.0 A is in a magnetic field of 3.5 T. The loop has 5 kx*n p,(a o*lv)kuz+dxxu4 oan 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 0.3s2waxc 3uwv5)ykv9 ,m 0 T. The current in the c,2k3y5s uwmav) v w9xloop 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 0y(f9u q/eoz27vsae1fz,d8 i p .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 thqpz7v fu y,9(/ased izofe 821e loop is parallel to the magnetic field?

  A circular wire loopn,8 f bv5bl90rcqb (yj 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 (chargw/j3 o+cr7cwr190 o eawpxmhw)n9 7rue 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 with velolu3, a5fctv+ jcity $6.9 \times 10^6 \; m/s$ 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 throu sk8q7d jw+s:2vud;ro gh a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proto 2d; qsu:jr8+ws7kdvon's resulting orbit?

  A proton is accelerated from u 5mgy7sgs;z9rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of;g9g5yu msz7s motion. Determine the radius of the path it follows.

  A beam of electrons is accelers1pb/2)ukcl n5d5r4t yqh0 xo ated through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.0xnptub15 4 s /r0kyqh do52cl)10 T, what value of the E-field is required if the particles are to be undeflected?