If the north poles of two bar magnets arc,.u8u3l hanqe brought close to each other, the magnets w h n,aquu3c.l8ill

  If the south pole of one bar magnet is brought neat6 hh-vx./t: m;j2xjd fba3 yor the north pole of a second bar mag ./;tboh af23xdjxy-vt :jm h6net, the two magnets will

  If a bar magnet is divided into /xwq2yv o tg,u38r)p1 ue,lzotwo equal pieces,

  The Earth's geographic Nora6z uxz9y do8sr)akgq ,pf.5 rzlt 0+9th Pole is magnetically a

  The south pole of a magnet 06s xjjj10dkmpoints toward the Earth's

  An electric current p/ hii;h wad4pjlsx) 9b9,lqs4roduces

  Which of the following is correctle nequki e m+p :p,((slux +y-6g(u5v?

  A vertical wire carries a current straight down. To the east ofv8,j7 2fc tnsb this wire, the magnet7 nsvtbf jc28,ic field points

  A horizontal wire carries a current strai;z3quzt,i9de 6t er3 tght toward you. From your point of view, the mati e 3;6zr ,q9ut3zetdgnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. Whe osl,by,fv9 ;0z j1qqdn 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 magv;zdo, qys10q 9f,jbl netic field

  A current carrying circular looefo 6;s shgh;*p of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sens hsseg;of;6h*e. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is the1c.pcn ic*h1 xzd,d- t

  1 T is equivalent toa3u .96b15ly6obq pvhas;rgx wsn ..s

  The direction of the force y79 2bqewse+fon a current-carrying wire in a magnetic field is describe2e f7ybeqs+ w9d by which of the following?

  The force on a current-carrying wire in a magnetic field is the stro 0 wt1( /q0mzjnsdq8llngest when

  The force on a current-carrying wire in a qfj53j,zs wbg) )a -0xqh625zy r t(aoakwim5magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magnet7s pi.aw8; g4gned n3nic field vector points due north. What is the direction of the resulting force on thisge g n7ns83;w.ndai4p current?

  A charged particle moves and r9zowgk, ae 8vku.5,of3/ mi cexperiences no magnetic force. From this we can conclu,k./kwv9aocfzm gi ur 58o3e ,de that

  A charged particle moves with a constant speed through a regiy;yuwh744 ,-bcpg z;u zredp/on where a uniform magnetic field is4c ,pezu 7r;h;/bg4 yzpydu-w 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 moves across a constant magnetic fielwv2figzy.a, d6+jst : d. The magnetic force ofj +.wgtsvdy6 2zi,:a n this particle

  A charged particle is injected into a unifor/ fmj yw23ryz2m magnetic field such that its velocj23/fymw zyr2ity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circulare oy.9ch.ylt . path in a uniform magnetic field. If the particle had been travelin.yt. yclo .he9g twice as fast, the radius of the circular path would be

  A particle carrying a chad nim 9fxxea(3)v d ekrq84+;zrge of +e travels in a circular path in a uniform magnetic fieldeq 3xkrn( )d f8+i9v x4ezam;d. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant,471 r:tmlzr 7/ y9guuev/z iqt an electron moves eastward at speed V in a uniform magnetic field that is directed straight dvz / lirzt4:eut9g 7um/1 r7qyownward. The magnetic force that acts on it is

  An electron has an initial velqs-d aykog957ocity to the south but is observed to curve upward as thyo daqs7-59 kge result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a docm (;4 ijjbwv8cs *adz)q:. region where there is a uniform magnetic field in the +y direction. What is the d ;sd(8w*cb)ciqjm.o zj4va d :irection 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-carryih m,g9op 8hy nm1,:ouyng wire is

  At double the distance from a long current-carrying wire, the str3mui: 8u3udd3c.z)q.b a .d ik8pkbdtength of the magnetitpi:8dq)u 3d3ac..kbzdu 8u k. db 3mic field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizo.0l 8ejsjl;w5z3 m 1/w3jokk1 izmepqntal 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 from3 eizjws3o1lmj w k8 lmz k;/jp0.1q5e you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires pxgv52t ibny b- 7/m4rqlaced side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic fieldt 4x/-7mbyn q 2vb5gir at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the for;qq krzi4gyq-k 11 w3ot l/s1zce between the wires is F. The current in each wire is now doubled. What is the magnitut1/y z4ok; 1-kzr1q sigqlw 3qde of the new force between the two wires?

  A long straight wire carries cub38l.x(hqd hnv)pd pct0ml0sa37z*fm7 ,ykb rrent toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the fcl3zkyvt0l ph*,fbs0d b87.qdp(m3xnm) 7haorce on the proton?

  A wire lying in the plane of the page carries a currenk hqm 6k.1()50s seo wlixs7irt toward the bottom of the page. What is the direction of the magnetic force it produc iik0sr71m hx(s owlq)sk.65e es 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 a horizontal table. Ifedggi8wrcvzk3b fz* -m-o ph/4k2r: 6 the wires carry current inp mr ri32zvgkwf4-/hd*goeb 68c:kz - the same direction,

  Two long parallel wires are uf/vxv2paa 6i pepm-yz*.z)) placed side-by-side on a horizontal table. If the wip2pxi6yuzm -vf/zp a*v . )e)ares carry current in opposite directions,

  Consider two current-carrying circular l8 e/w1ih:m2ne yafvlw4 0l x3loops. Both are made from one strand of wire and both carry thw:nfe842 eal hvyxliw1 0lm3/ e 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 is

  Consider two current-carrying circular loops. Both are made fu q+)hi 1uq)8r2xs,l s ntm(vvrom one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the lu,v+qs(nt)xvq8u )m1 r2is h smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when t fiy-8(2c 7zp4zwyqavhe angle between the loop's magnetic mom7f4 z-y a(z w8icqy2pvent and the magnetic field vector is

  When placed askew in a magnetic field, a as *e/04ewt.r+hd 4pf j0mhf d1kppo :current carrying loop that is free to rotate in any direction will expepehkf.mos 0*tf1p4:ej hwa p+ r0d4/drience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electrihixnwn* 12ue6uom:.2q ec*hvd d;s r1 c motorsc6 x q2sen*11ir:nw;hd.e duuo2 v m*h?

  A circular wire loop lies in a horizontal plane on a table and carp,r1-owp, 9jv 4q+ q e:dsdwghries 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 cwvp-4dsow1h+ ep q,,:gd jr q9aused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated througk)+w7 glvw,bos kz5 3uh a potential difference V and allowed to enter a magnetic fiezukv,l w)3g+7wos5bk ld 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 av012eo t 5wvb9kmvl*h charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particvkl9 21toeh*w05vm vbles 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 cht+ 99r 5fetnjurrent of 0.60 A is oriented parallel to a uniform magneh9n 5t +tjerf9tic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 Aqw; tsap 04,h/ wr-yoa 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 oncz)l3k c4sxvm0,tkvjj;)o ig bm8cx/3*v /kj a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire mak/ ; vzxt3mjco *3l kv/0 v8ksxmjg)bjcc,)i4kes 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 5 3yl;1rpc6 e dja3zgc*d/tkpd)m fu+magnetic field of 0.10 T. What minim3 czl)pard5kce+tfgd ; /jyp 1 3dmu6*um current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in ajhr2fx6m: q,oj-at q / uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the protonh,oq6 fta j-2mr/: qjx?

  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 wibn*kkbsw tz6d z15-b 0lkcv6, th 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 spevd+4k 4az6p(sge) q qbgo3-hved 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 with i-z,yy cvf7f;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 of dl 5*hpf8ssd*rxm:)f$8.0 \times 10^6 \; m/s$ 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 of +k)6tzv(dz .x wjtp7v$8.0 \times 10^6 \; m/s$ 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 speedb8)e.gu*ul .4xm dpod 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 a current of 25 A. What aetj3b(*7l(dd+ yn jm g04 quh:zju6gis the magnitude of the magnuud g 4dyg7(3ae6zh+ :*tb(mql 0jjnjetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A geqfskz z v3r,zpi82er,vbr6jb *. 9e/anerates what magnetic field at the ground, 10 m awiszqer2zfb,v r *br/986zvejk3,. paay?

  How much current must flp+me2cbot(4bu9g k1d ow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a lo ctn- wz0ctl*q+h3t 4qng straight wire carrying a current of 5.0 A is the magnituq3t4ctq *z+ 0wht- cnlde of the 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. Tho, :(l.m :gpp .ms0abfo q; kihy2nhpp)cg*d2ey are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm fr; p:h*ob.hqg pf(a 0)cs,:mnlmod.2gpyipk 2om one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A anmy ,c01247oejpw+0eoq -kw.w lntyzsd 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the two wiqcw0wlk.-yo7se je041 nyz,+ p2wmt ores?

  Two long parallel wires carry currents of 20 A and 5.0 A ini/4iib lx6: dbh. ddr9 opposite directions. The wires are separated by 0.20 m. At what point between the two irddi:6b4 li9xh/d.b wires are the contributions from the two wires the same?

  Four long parallel wires eacv8ztb4mfk+r) b tl- 1ah 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 field does one of the k4v 8t-+arbm fb) lt1zwires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A vo.ixid1+,abo y 8hy/in the opposite direction. The wires are separated by 0.30 m. Fin,o .ao+d8iyb/yvh i1 xd the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wir23d kystd2a n;e of radius 4.0 cm whe 2t;akn 2dyds3n a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 4ko1 gm0chud1xtv; 5 cqz91y r5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current 41qh0t9;vy 1dxkco5m1rucz g of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and car rx(+x ,xky;fvenc*l u1,d. turies a current of 4.0 A. What strength of magnetic (ue. yx+ ;x r1vkdtcunlxf, *,field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long 1kci yj0 f5c6 izq0lo2to generate a 1.0-T magnetic field atif0qci 52zojcy6k l1 0 the center?

  How many turns should u 2 k3o68es ictn:j8zoa 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 lo/7,hipf j(n-kv2nrkeop of 120 turns that carries 6.0 A if its dimensions are k(nk-pnr2/7j v ihfe, 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetih27 ifew+s1 bwx/ k;2r:fwsdfc field of 0.30 T.: rs21fi2h 7bxw wfes/f+w;dk 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-sectional;pw t7aoye+i;+ iud:q),di+ pi yp( wd 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 2.0 A is in a magnetic field of 3.5 T. /-al*1j cvjk pThe loopl/p 1a* c-jkvj has 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 0.50 m is in a uniform magnetic field of 0. + d9fyifxo12w30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the x12d 9of yfi+wloop is parallel to the magnetic field?

  A circular loop of wire of radius 0.5y0 6pg 4)zvygl s)z8hq0 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 whenqsyhvp0z8)zg 6 l )4yg the plane of the loop is parallel to the magnetic field?

  A circular wire loop of a5qk;mx9a 2jagz;8txg3cl t,urea $0.25 \; m^{2}$ 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)s2w6/ nlr 0hkimvo 2lnfq6. ;1ii6jcj 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 velocity j4nv)jr. ;) mpsinxsav70+xy$6.9 \times 10^6 \; m/s$ 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 magnq9jur0xs)m;8o ccq / metic field of 0.040 T. What is the radius of the proton's resulting o8ccm 9mrx/0 oj;usq) qrbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field (teou oyhi)-ka9ggxbu.bi* h *q,(3fof 0.30 T oriented pu9*xt( )gqbafig k(-* hbhy.i3 o,euo erpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potentialoxy5 r ejo,;f(7 s5eam 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,5o afyrexe7o; (sm5 j particles are to be undeflected?