If the north poles of two bar magnets are brought close to 1)y;zgqbrk1sh zmlh.gzykh 4uax3 x :4c+9)w each other, the magnets will)khy l9+m gb4:u )x1zka3hw4rcq .z g ;yhsxz1

  If the south pole of one baxu5e sdz o 1jr;afj0yaz+n ag/ag*373r magnet is brought near the north pole of a second bar mae1j3anuf/ da gr703*jx ;g+za az5osy gnet, the two magnets will

  If a bar magnet is divided into p7*r k ew*sb8zgto :.rtwo equal pieces,

  The Earth's geographic xrn92i uorn; csz7t, 0North Pole is magnetically a

  The south pole of a magnet points toward thkbup.g,b ;3*m,vjfa(g.: yas r:uzbzaz w m48 e Earth's

  An electric current produced 93g 2ywon2kfh2ll f1s

  Which of the following is h -v-uh7)h pkpcorrect?

  A vertical wire carries a current straight down. To the east of this wire, thec. bex0nmyy4d5yns8y56 vc9h ma v0 8c5nyey6nbxc495 mdshyy.gnetic field points

  A horizontal wire carries a current straight to5;koz 91;d mnfon0rt iward you. From your point of view, the magnetic fie1;kz0; fo5mnt9i rd onld caused by this current

  A current carrying loop of wire lies flat on a table top. When viey/p7n u. )txl /jbt8xswed from above, the 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 //j8 lx.tx ut bs7p)nymagnetic field

  A current carrying circulh4rw2cgwr *cyv p6y (-e-qm (war loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What iswwygr( -6e-hm4p(*c wq 2vryc the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic1sg lqyg,kar )7zzu0 2 field is the

  1 T is equivalent toxz rm2oa)vexd/)6a in3 o3.uu

  The direction of the force on a current-carryinvz -8 fl5whu2oh.::qxh9jcg gg wire in a magnetic field is describedgj u h:9:voh5wxlz.hqf82 gc- by which of the following?

  The force on a current-carrying wire ip+ebjfy 33uz*w+ku u7/zn yo0 n a magnetic field is the strongest when

  The force on a current-carrying wire in a kaf+b t f 56m/8.judtnx6cn,pmagnetic field is equal to zero when

  A vertical wire carries a current straight up in a reg0r- jkyq4bjj :ion where the magnetic field vector points due north. What is the direction of the resulting force on thi:jr-y0j k4bjqs current?

  A charged particle moves and e)w6km9 3 .,psivaj xd*.oofb vxperiences no magnetic force. From this we can conclmd ks.9,ijvwo6 v3b )p xf.ao*ude that

  A charged particle moves with a constant speed through a regy, pa1a*fb*+wpbl/g jion where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on thibap/*j p+fwyb, 1al *gs particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic fvhb99hi 2;qesield. The magnetic force on this partieh9; hsvb92iqcle

  A charged particle is in)iev n k jkux:m+a,s(1jected into a uniform magnetic field such that its velocity vector is pej em):sxki ,1un(a +kvrpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a unifo/q44.mj;vj0fkg c/x8mh ib jbksb ,i,rm magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would h/ 40,j i s/4fjkbmbqm;.i8 k,bcxjgvbe

  A particle carrying a charge of +e tram/8a2/)rzmtopx b7nn vels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radn78x/ao brznmm 2p)/t ius of the circular path would have been

  At a particular instant, an electron *uwz4heg 8 3 jtlzomthtr6/p+k5*0 zh moves eastward at speed V in a uniform magnetic field that is directed str pz0htzm 3 6l*wt *4e+5zr/huj g8thkoaight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obthl ybs-4.*f1ntbr9w wtd )dj y)v-k k kav7.6served to curve upward as the result of a magnetic field. The direction of the magfykvta)-kv7t k d rnb h-l y j149s.wtbd6w*).netic field is

  An electron moving along the +x axis enters a region where there is a uniform5jgc.dh9 /p:/kp hn)b g0 u*vzhar) hi magnkuh/b) jhp0 *vng9ipa cr hgd5h:z .)/etic field in the +y direction. 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 straightpc uhr6 qc2f.6 current-carrying wire is

  At double the distance from a longigb y/2otr;d 6xwtr h- gf6-4o current-carrying wire, the strength of the magnetic field p xh/-ootw6- rgt y2irf;46dbgroduced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal p0 j*yd8xtl5*8w aqe itable 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 magnet8 lwji5 y8qep0xat*d*ic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a hbp/-pd,oxv :j7h, m meorizontal table carry identical current straig, pdvxj 7:opb m,h/-meht 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. kw m h*ml26ed3The magnitude of the force between the wires is F. The current in each wire is dlhw* m2m63 eknow doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton 86/j:1olxxe kl7cjj fmoves toward the east alongx/7j x:jlck6l f18jeoside 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 toward the boh/oby,w b,hn-rk0t8zd -3nw h ttom of the page. nkh8or,y w3bh- z/0wb,tdh n-What 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 placedbsk1t-d *b rt/ 5f34x 1tqxtzb side-by-side on a horizontal table. If the wires carry current in the samet/x1fbqtr 3bt-* xbs5zkt1 d4 direction,

  Two long parallel wires are placed side-by-side on a horizontahvsu +cc;(6gpn lg7r8l table. If the wires carr(7r8 glc s6nv+cghu; py current in opposite directions,

  Consider two current-carrying circular loopr0w4x 42wv1 -auaaoj 9a*plc3nwft6 s4 dzag.s. 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 smaller loop, the magnetic field at the center of the larger loop ic0t*laaf4w4.ad 3jwpn-w9x uv2asaz4 1r6 go s

  Consider two current-carrying circular loops. Both are made from one zq+hx / o;i4ldstrand of wire and both carry the same current, but one has twice the radius of the other. Compared to t dq;xz +4hli/ohe magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop skqm lfd x:un +ob.pow*4 4.v2occurs when the angle between the loop's magnetic msd4kovx+pqbm 4ofw: .nl*u2 . oment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying logtu.rhp1xww4n.2 - yaor.w*cop that is free to rotate in any direction will experience a torque until itsh4y *w .rnctwwxu2o1a.g p.r - magnetic moment vector

  What fundamental fact underlies th6i, mbpt8jcbb85 +sx qv,)ddh e operation of essentially all electric motors,6ddspxc )hvq8,j+m b8i bb5t?

  A circular wire loop lies in a horil. r 09c t5zeula6hj.uzontal 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 hul.r zjctl56 0a.ue9and 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 azi+ ; brph ul* 4-o.l(iqsb3nqnd charge q is accelerated through a potential difference V and allowed to enter a magnetic fie- in q*oul+sb r;zip3q.bh(l4ld 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 chargedhz oh-*qc 0/9vl.obagkv 6h4x particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and a kh4 h0ogohbx.v/* l9z-v6qc 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 paralo(-9+tp yv healel to a uniform magnetic field yt o(epv-a+9hof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directa nhf82;dko6sion 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 metev3o2-d34lc9g opdeu+ k hlp .ir on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle oflkv ddo 9cpeli3 .3pu-2h g4o+ $27^{\circ}$ 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 magnetic field qqfq63xv0s:gjx x b/2zg-p (,wpy/ n jof 0.10 T. What psj/bx0j -q/g 26gx x(qq v:pn3, yfwzminimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is(yn,c.m d(yn v in a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the yy (m.nncdv(,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 7,vt4m 4nsvpua 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 speed oh9oe -uud0 x jkng(7)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 wiu wz(dya bpj12qva; 61th 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 m39 4jvsim+t.i)vvk r 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 speededd6* ka*2ce 6vp9 u(vpjc4 cy 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 pbj4q:7nx j ljeox4f+zfn4vr 2 0un(: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 carries j6a3btd j- r(ca current of 25 A. What is the magnitude of the magnetic field at a distancea r36t( d-jcbj of 0.15 m from the wire?

  A high power line carryin ry3eft+x1kue,u g/,f,;ojabg 1000 A generates what magnetic field at the ground, 10 m away?rteu,f1 ; k,guoaxe 3/jfb+,y

  How much current must flow for pi , l f tsy:5wli:h68zvt5tq+$1.0 \times 10^{-3} \; T$ 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.f1zg ,9 p(yo1z-q+ oc ixc4tur sc6dy80 A is the magnitude of the magnetic field due to the wire equal to the strength of t4sqt 8y- cgru(zofip1+coy 96x1 dc,zhe Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry current4z3z .ux6ogvls 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.lgz4 v6x 3ozu wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0re 514vxie2 l*k)t6 f hwtlt;7 khmvy2 A in opposite directions. The wires are separated by 0.20 m. What is th6tw v);7ti h1y4lt225 khkmfvel*x ere magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directiontb- u17rukhr5ebmo;:z o 9t :is. The wires are separated by 0.20 m. At what point between the two wires are the contributions fromi:9r5r u7;eo tu:-tzmokhb1b the two wires the same?

  Four long parallel wires each +.zn,8q 6.iw nkiiwth carry 2.0 A in the same direction. They are parallel 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 wq w.nzki., 8t+6inih field does one of the wires experience due to the other wires?

  Two long parallel wires car2yuhhdbok l h-5 v,k+2)z ty5;c mxei8ry currents of 5.0 A and 8.0 A in the opposite direction. The wires ; ct y5k )25dkxmvlyzhh 2+-u,he8oibare separated 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 4e e2pw4p8bio:b;nyr): oqm c4.0 cm when a current of4cpq :ie8 np2;ewb 4r):y boom 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns9i,*asls o- injz *48mi m8jlo of wire. What magnetic field is aj* ms8 4j-8l*loism ni, ioz9produced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries rk* p/ 60 v8bj mqfj6fqe-s;sva current of 4.0 A. What strength of magnetic field will it have afpsrv*mv 0j-j/fsbe8; q6q 6 kt its center?

  How much current must pass tk w wp9 :e.w(bfn,8zwqhrough a 400 turn coil 4.0 cm long to generate a 1.0,p ww:nz 8e9kqwf.w( b-T magnetic field at the center?

  How many turns should a 10-cm long solej( sjmsub8ic ;0.,eu c l,p- pu25kmbxnoid 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 loop of 120 turns that j0 b59dr-q0pfmy t6qmcarries 6.0 A if b 6r0m5pfdjy9t-q m0qits dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wir /3wt5zp vdza*sna):ony/ /pt e of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. vznwps/ty /* 53)/t apd z:noaWhat is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional are )3xprjhm7)0smke*;e 1uifje a $0.12 \; m^{2}$ 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 mag.j:ftz clq*h)rtugc)o5e0 -sc ax9j8netic field of 3.5 T. The loop hash)59cjxc rtz-0ujgoq8).etlac s:f * an 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 0.50ow:ed;yuv 8d* 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 oeuyw8 ;*odv: df the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic 4u1dzses0p1y field of 0.30 T p0szsue 1d41y. The 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 wire loopt 7tl+ vl0bg0l 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 a speed oznh9 grap0 ohy 93sz;5f $1.0 \times 10^6 \; m/s$ 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 pxgwmcb s:kdpz(afw;e(38ybb- w92( ug q- 3 awith 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 potential of 1.0 kV and then moves into a magnetic ldt5(p- hln/ ofield of 0.040 T. What is the radius of the proton's resuto hd/lp(5-n llting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnet j7.kd pl:j2lbic field of 0.30 T oriented perpendicdlkl :.jp7jb2ular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of h19d gu 7gg*zl10 kV before entering a velocity selector. If the B-field of the velocity selector hasgguh71zgl d*9 a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?