If the north poles of twj,bo :qsr3ttrpc-n;k jd24 0qo bar magnets are brought close to each other, the magnets wilrjt :2tqrcs od 0p,4 kn3;-bqjl

  If the south pole of one bar magnet is broughtt42cncfj u2zgt- le3n( z0il; near the north pole of a second bar magnet, the two magn;gj 2tc43f-u2lilzz nt0 (n ceets will

  If a bar magnet is divided ;sm ryzcvzq8nn5g7( oer72hw at7i5( into two equal pieces,

  The Earth's geographic North Pole is magneticallf g;mm8/p-9unh +f9.fbeqsm 3fk xo7 jy a

  The south pole of a magnet point4gi2 i)i z3y4j)q9pje (knosis toward the Earth's

  An electric current produces 3yjyxalhl2y uhz-x* 46v-n s/

  Which of the following 8mb-r y v8c5tzis correct?

  A vertical wire carries a current straight xl.7:xo6qivjsy(x : ubyzj9t g+-9 dg down. To the east of this wire, the magnetic field p +gx(sitqv- z x96g7 b9l.:uyj ydo:xjoints

  A horizontal wire carries a current straight toward you. Frufx ;2r t b/t6rg+q3xkom your point of view, the magnetic field cax fbt6 /2xtu+rgqk;r3used by this current

  A current carrying loop of wire lies flat on a taj*orh(. jy4 ryedd/tvxk / q40ble top. When viewed 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 magnetvd4rh(kj/ 0ydqj4tr /x.o*y e ic field

  A current carrying circular loop of wire lies flattbj;n)k;9 gxd on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of thentdk; x;b )g9j magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magne9c 7 g r er3o7x7)sjx3mg)fteub0m5imtic field is the

  1 T is equivalent toaafl s4two(s161h7cg -d jud )0zn /nnt2c3te

  The direction of the force on a current-carrying wire in a magnetic field is de76 4 y4primpksr,k+described by which of the following?+6kr em4pkr,7 dp4iy s

  The force on a current-carrying wire in a magnetic field is the stro adw5)8 smk8yongest when

  The force on a current-carrying wire in a magn8njo9i-2emtwm uv+. h+ / asutetic field is equal to zero when

  A vertical wire carries a current straight up injzd*6ivbs 6a) a region where the magnetic field vector points due north. What is the direction of the resulting force on thia )6i*z6 sdbjvs current?

  A charged particle moves and experiences nost v3 teoz0t7/ magnetic force. From this we can conczt0/ t7es3otv lude that

  A charged particle moves with a constant speed through a qkti+g/p 0 8v.jldh5p region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the partikhgq/dti85j0+pvl .p cle moves

  A charged particle moves across a constant magc 4v/kp-j+lhkn,,1 rzkz2m g hnetic field. The magnetic force on this pakn+m,hr2 1lvg-c ,p4 kjhzk/zrticle

  A charged particle is injected into a uniform magneb1d 6bo,idbbu5 2 opv6;xtf)u tic field such that its velocii)uf5b 1d t2b;v 6du6oob,xpbty vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path i4kf(f qy *cpz0xms9i,n a uniform magnetic field. If the particle had been traveling twice as fast, the rai*fz0ypq xf,c s9 4(mkdius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform m0 au6j3;eeji (sdq1in agnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have0eji6 eq1dj;n 3(i sua been

  At a particular instant, an el,1cqg ydmo9e rg 7;z2lectron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts ogl21gcm rezy, 7q;o 9dn it is

  An electron has an initial velocity to a7oybcrf(w(:1 v 5u4hiq*n jythe south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic field iiw(ha qn yj4:(1or fcuyv*7 5bs

  An electron moving along the +x axis enters a region where there:3og k b3n zy+ uovn:mpp/a/z.wl)p5 w is a uniform magnetic field in the +y direction. Wly.zmw 3o bgun3w)p/ zpk:no/5v+ap:hat 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 l)vfd ./g7s:fg.1gikw c 1ux*qiku cz1ong straight current-carrying wire is

  At double the distance from a long current-ct d,u 3-hjtx3;jst0(j5iaqrc+0k tp m arrying wire, the strength of the magnetic -xt, t0 3+r5hjdt30 (cjm qapiktsj ;ufield produced by that wire decreases to

  Two long parallel wires placed side-byy)mc36 lzgs05h7 uiik-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 youmlyhisgk)uiz c6 35 07. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-skblj(awux)wzv3ved cl 0 tao)1m.824 ide on a horizontal table carry identical current straight toward you. From your point of view,t3xa lwv4o z j0 uv2(8adwlb k.c1)me) the magnetic field at the point exactly between the two wires

  Two long parallel wirevee5voz g*8y 3s carry equal currents. The magnitude of the force between the wires is 53yvz e ve8og*F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wirezd9d ;ma3xcg . carries current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force 9c 3dxm;dga.z on the proton?

  A wire lying in the plane of the page carries a current toward the bottow8k9mi d+d-2 g6hxvlpm of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, apidh dv+lg x8k 69-wm2lso in the plane of the page, from your right?

  Two long parallel wires are placed sj1d+, vno :fsfide-by-side on a horizontal table. If the wired1fv:s+n,o jfs carry current in the same direction,

  Two long parallel wires are placed side-by-side on a ho /jm +8q.r4cjb. ofsdnb -/do jj5z0harizontal table. If the wires carry current in opposc-j.zdobh mfj5.0q on/d+ 8jj as/4brite directions,

  Consider two current-carrying circular loops. Both are made from onehst v hzbx2-pyfn5 xa03f/:a: 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 la5afzb2xhpth30 n xy vsf:a/- :rger loop is

  Consider two current-carrying circu4c;jmw/ k- ililar loops. Both are made from one strand of wire and both carry the same current, but one has twice the radwk/ c-ii4mj;l ius 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 occursh1+/mk q zzt6b when the angle between the loop's mag+z16zmk/qhbt netic moment and the magnetic field vector is

  When placed askew in a magnetic field, .fa8u w7l2zvdwny+) ya current carrying loop that is free to rotate in any direction will experienfazl7 yu)wy. w+8vn2dce a torque until its magnetic moment vector

  What fundamental fact underla0behct8,f* c,s )vbqies the operation of essentially all electric motors?cvf0 hte) 8,,cbas*bq

  A circular wire loop lies in a horizontal plane 7 +xjeuh q. -fgr7gtz4bm0e)non 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 table because of the torque caused by the curht )7- .bnxfzjmge0r4eg+qu 7rents interaction with the magnetic field?

  In a mass spectrometer a p1mr(j1 cdctxcf h.;6tgo .*r barticle of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, wo;r1g(16t mcfctdc bx.. r*jhhere 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 consistsa*slq 7i tcy.,.bo d 8be6 ccash5xby;+5w+lu 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 xy.c +.cy8cw5 aabqus5l67hi sle,dbb ;+ t*omagnitudes 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 parallel9a9k b:hatb v.x-g)k l to a uniform magnetic b)9a9 k:.gbht-xla kvfield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curr qu.8q5/7 cll hxyc*foent 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 on a straight wire carrying 5.0 A when vgtx 4905 rnairgj dvrj/8x0+2w 9zesit is placed in a magnetic field of 0.0j9+idxj29 a gr5rrnt4vx08 sew0/ gvz20 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 and is in a ,t 4a vxkyci 6n9:c5cimagnetic field of 0.10 T. What minimumc 4ikcvt n59i y,:cx6a current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is7tr/ ny4tnel90ikqt0pq 9f+1z ,cbpl in a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the pr1 z fet p0ctnbnr/y49qqp l0klt7 i+,9oton?

  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 spei(;db7m8bet7 pet r (ced 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 speey l2 9iaoo)l7fhv;yc.d 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 dues(q/+r6 w6ag6 g sjz auww1x,y h4e/nx 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 speedmn*mucql 7: 3z 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 wi9qc ,,g: jaw+es2 //ufmvp sb 51zzwxvth 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 oouvj, u d -heh (epu6eym4qlo,*3p)q7f $3.0 \times 10^6 \; m/s$ 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 a current of 25 A. What is the z /q3 o,mkygi;m 6ypm0magnitude of the magnetic field at a distance of 0.15 m from the wire?igmp60z yk,; /mom3qy

  A high power line carrying 1000 A generates what magnetic fz yctc ,zxm* pjdz;a3:0r -jp r9;g.qxield at the ground, 10 m away?-qy xpz jj,;zz;r c .g*dprt09ca x:3m

  How much current must flow for/4d5zhuqd-v n3w8 c rf $1.0 \times 10^{-3} \; T$ 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 the*kby wu6nj,7 v kor(;q magnitude of the magnetic field due to the wirek, u7bj(nk* 6qryw;ov 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 opposit1kew*odlr htkq5.e ),e directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20ot weh.k,q1ld5)k* e r cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5 vgip33) b zez+a.o(qg.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic fieoe3g z ib 3vza)q(.p+gld midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0lrm bp +(5,;ocyrekv+1sl1uf; tu z.k A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contri szvpk b+m,olyruku5.t 1l1 r;( fc+e;butions from the two wires the same?

  Four long parallel wires each carry 2.0 A in tha,s6nz6 kp l0be same direction. They are parallel to the z-axis, and they pass through the corners of a square of sid,6az0 sl kpn6be 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 Aa6: 0gdr rspl0t)vhub4 0wp 2s in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the ts0 0vp pg6trb0l:4d wr )us2ahwo wires.

  What is the magnetic field at the center of a circular loop of wire of ra+l su5z+mdwnz0w md,9dius 4.0 cm when a current of 2.0 + ml,msw +wz5 0dnud9zA flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fie-g zo5.e 8 wklpcjwpk.z8* fx:ld is produced at the center of the .lp-kgop* 5ww jcz:8x8f.ekz solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m lj4qk hl/xtv.s )31h qrong and carries a current of 4.0 A. What strength of magneq/1l 4th.v3jh ) xsrqktic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to gen1tkqhv+/ c m2ferate a 1.0-T magnetic field at f/+ckvh m21 tqthe center?

  How many turns should6np:9i7 f;ssztx5tq o 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 olwhjgc 2 clil6:mu0ep)bt1: lz.d9f 8f a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4d28ib.c1 ep0g wu:zlc h :6ll9f)mljt.0 cm x 8.0 cm?

  A circular loop of wire ohe brr xa(ql3 ox7;)a4f radius 0.50 m is in a uniform magnetic field of 0.30 T. Ther;xla4a73 hxqoe)rb( 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-sectional asu)d k:ilaz1 ). +g*dh i3blfarea $0.12 \; m^{2}$ 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 magnetoicn3stoqv),) )i) q7 x)lbdzic field of 3.5 T. The loop has an)sqd o)7i3 o)i)bc)qntlx, z v 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 ma 3,-eav ms8dsmgnetic field of 0.30 T. T-, m3smeasv d8he 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 uniform magnetic field of nq8jvyc-i/ljc*u )j(6eq9tj0.30 T. The current in the loop is-cq) tv ij*nq 86jlc/je(9yu j 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loopy+k16f) ( seons4hobkns(h -z 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 spectromet(ojg e6h+k)sac 3b z,mh; ,dghn7jc1ier, 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 with vej) hom p09ze w-gvdj5*)zg qj5locity $6.9 \times 10^6 \; m/s$ 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 move.vhgy*lt1y / tpw+*5 ubc +3ruo7pj rws into a magnetic fiel g5hpb*cp3uo+t*lyvrt y/+ 1.u7wjrw d of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field ost/3 b 9lhkc.df 0.30 T oriented perpendicular to its direction ob9d sckhl t3/.f motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference otk -ypfuhz7k6f0q8b 1 f 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 particy 6ht8uq-0 zk71 pbffkles are to be undeflected?