If the north poles of two bar magnets are brought close to each other, the mc8-e4u gab+rv b(j z:iagnets wil rjzb:uc48-v+gie (bal

  If the south pole of one bar magnet is brought near k- mjp p96+l dhvu1a*mthe north pole of a second bar majp9 m* 6h+dmvapul1k -gnet, the two magnets will

  If a bar magnet is divided into two equa5cm m q8:ocn*zt:i)9a uyh3qwl pieces,

  The Earth's geographic North Pole is magnetically8w imx0j9px (p(bqf *l a

  The south pole of a magnet po6p e3v* nl,r2wi5zof-bdf:lg ints toward the Earth's

  An electric current produxkl* hwjgp7u-cz22,zm6ly( mdf8n* w ces

  Which of the following is corr/ v:kz(b(-l3o rhokw aect?

  A vertical wire carries a current straight down. To the east of this wire, plpu:;fsk nr*v,9j4o the magnetic field po orsl f4p*;,v :nkp9ujints

  A horizontal wire carries a current straight toward you. From your point of cipk 4tgn.x5/* sxu0e7.c jr zview, the magnetic field caused by this cur cet5u/*.4xr 7p ixkjz.gn0scrent

  A current carrying loop of wire lies flat on a table top. When viewed from as;8 b clqe,y8yj+kp+above, the current moves around the loop in a counte+ayebl+s8 ;k8q,yp jcrclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lieszf 3 gxu;o ,d7iz fd2kgj+6yn6 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 caused by this cu3fizg27 o+ ;nkd f6,gzy jd6uxrrent, inside the loop? The magnetic field

  The SI unit of magnetic fsz;z rxs :n.uat-w e:p *mbjq: :6;af(gon8ew ield is the

  1 T is equivalent tool3:4ul(pe w) i +bbsn

  The direction of the forcebink-0hb 01n w on a current-carrying wire in a magnetic field is describe0b01n hk-w inbd by which of the following?

  The force on a current-carrying wire in a magnetic field is the strq j8*1shr, )8umw zwhgongest when

  The force on a current-carrying wire in a magnetic field is equal to r0n( qkn*r9lozero when

  A vertical wire carries a current straight up in a regdk-7 2a4pk y/qiy3 jamion where the magnetic field vector points due north. Whatj/p mkky3iq -aa2d y47 is the direction of the resulting force on this current?

  A charged particle move8s4o;fmxh i(t do uf59s and experiences no magnetic force. From this we can conclude tho mu4do 8(x5;t9ifsf hat

  A charged particle moves with a constant speed through a region where a uniformb*igj:hx c(7t kouy9in yi3 x8)-w-ec magnetic field is present. If the magneti:iue8jo9t x ikn )bc3w7-i(c h *xg-yyc field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle mo,npf + 9v.upvhves across a constant magnetic field. The magnetic force on this particfn9uv vh,p+.p le

  A charged particle isk: el6lvkvz,3 injected into a uniform magnetic field such that its velocity , lv3vek6lk:z 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 in m ff0n/4qdh8xkbc(,8rb5bg ca uniform magnetic field. If tm8(fxbck48cnd fg0 r, b/ qbh5he particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a kj(3m8 r mw*lc4su0iacircular path in a uniform magnetic field. If instead the particlr jw*la0m3 ckui(sm 48e carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniformr08lrm8 ml p24 u u-r:eul nsp6)k2znf magnenu28uf4pll2p 8r lsu6 r:z menk)0rm-tic field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south/6wojik7+prtpps+i 1 a w 0.xp but is observed to curve upward as the result of a ma1it saxp0k+o 7.ip6pw/ + rjpwgnetic field. The direction of the magnetic field is

  An electron moving along the +x ax,lr/hq2 hmy er3g , d-ku.2uffis 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 right, +y up, and +z out of the page.,flmhg 3 2qd/ ukry-u,fre.h2)

  The magnetic field produced by a long straight cur6xd)y lng nm2vxx :2:srent-carrying wire is

  At double the distance from a long current-q ts wvrf6tnv g.y/((+carrying wire, the strength of the magnetic field produced w6s.nrgv(y(tt f/qv+by that wire decreases to

  Two long parallel wires placed j, ys 2eaj82sa9*jii n3n1nldside-by-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 awa82ny2,j esi 1n dsj39*naialjy from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed sidfuz br7ct0(7le-by-side on a horizontal table carry identical current straighttfrc7 uz70 (bl 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. The magnitude of y b/c7z,ef;chhnf w pk7(a 2dj,) pwe3the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between ,, )2p7ae 7kj py b;e3zfh/whcfdcn w(the two wires?

  A long straight wire carries current toward the east. A proton m l4vw2zm bm*xh.g.o y+*uf3 ekoves toward the east alongside and just south of the wire. What is the direction of the fol4*eg3bv.mf hkozw 2m*x.+ yurce on the proton?

  A wire lying in the plane of the pagm4wczfb yrir6/k03.)kkmdt( +wk 9fjz .-ci ye carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, fczymk imftk(.)3- rz/6bwkr 9 +0k .wj4cyidalso in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a hosqqjhm(x 17. s7f2mtrtev58y0 *tpuodmn +w2rizontal table. If the wires carry current in the s nm*qstvxp5d0 .uttw1 27 7sofhrm2jm8y + q(eame direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If thec/cbs /li: e.e wires carry current in opposite directione i/s b:lcc/e.s,

  Consider two current-carrying circular loops. Both are made from oe );fw94 pmoskne strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the mago 4pk ws9f;)menetic 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 arejcc aiwya0qk*3 1u+pz3 r +,ki made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to 3aiz +i,arcckuj *k01 wy3p+qthe magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurpz6sd )k88e clgl*v mr.fm *p+s when the angle between the loop's magnetic moment an rpelmf6gm8*pc*8z.vkd+ sl) d the magnetic field vector is

  When placed askew in a magnetic field, a current carryijpp h8c5.4swong loop that is free to rotate in any direction will experience a torque until its magnetic mp 4wp8sj c.ho5oment vector

  What fundamental fact underlies the operation of esseney 26c 1su-270 fvc ggk; *lmbr6nrg 8yopvo8otially all electric motors7rc*ol kyb o0 v-ng1cyr2ovm ug6e86gps ;f 28?

  A circular wire loop lies in a horizontal plane on a taba91wjlg:3qfd kj .r)l le and carries current in a counterclockwise directq g.f 3jwdjkllr1)a: 9ion 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 partichx ao 9r38vudyvq, ,(nth 0e:xle of 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 particl oq,xy dnhr 8t(e0 ,9au:hxv3ve. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector cons,8h.) qgi 8omfz/gvs q m8cy 9x5ycj*tists 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 i 8t9yxci/, oqqzh g.y8mm*fj sv5g8c) s 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 to a iy)f.erigjx/hd.,/8sa y 0 b g i12ulguniform magnetic fgs/eg/ ) .,y l.iau1hgy20frbj idxi8ield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 2j2 w-ojvylfqhh20 q3 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 it is placedwtfygbpy0e )i1 v8a25d)vc p5 in a magne5 v)vdwify )b2ecp8y tgp50a1 tic field of 0.020 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 magnetic fa0a w(hvz,4jf9 (:a3kqxswtm ield of 0.10 T. Whatfz 3at( 4waa0 sh9vk,(w:mqxj minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic fim6 e8co+ergew0i*dh 40u/hha eld of 0.20 T. What is the magnitude of the magoe0hr /6* +u48 hi0e hwacedmgnetic 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 s t0tn,g 2ev)hepeed 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 spew(36p/(mlcl fs8 s90v e03cneg dfhgaqxys(3ed 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 witp spj i, 4/dpqyi:.jj8h 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 4 7lu k5q)h-o renkq:uspeed 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 oll9e1qet: s a7f $8.0 \times 10^6 \; m/s$ 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 of trd lc(vp e14mnai36,$3.0 \times 10^6 \; m/s$ 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 gko2;l, pbye oz48em eqc;x-; the magnitude of the magnetic fmo ; ;xe eq-;e4ckl,zybog28p ield at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field amj-1; 6 b/bbt)y z.; tyiydoact the ground, 1/yi ;m tyb b6.td-)zcaj1y; bo0 m away?

  How much current must flow for 2 chm:(wof inrt6:)4tu1e)vzl1go ao$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of5yfbab( /+ oiy 5.0 A is the magnitude of the magnef5a bo +(iyyb/tic 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 curre9d1qo;ds5 k f8o amr+5qhuxf2nts of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in th +qh5u9kooqaf1x dsm rd 5;f28e plane of the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of l9 hnkg/k /fn8ke u2oj73 l(fn20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the79ke8nl3uj(f /nkhn klgo/ f 2 magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A du/izc xd7) e2o h8l3v1ilk9tin opposite directions. The wires are separated by 0.20 m. At what point betweetouxi18lc)d3 z e l 9i2/hdkv7n the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the sah96y4jrg8q la(*du rzme direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in th8u(* gdz qy69rjr4hale 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 Ag qx9nwx0d0nlo 7gn3/ in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length betwee90q/ n0n 3xg7lgwoxndn the two wires.

  What is the magnetic field at the center of a circub,4q epxw8n4. a)xcebd:5 b uzlar loop of wire of radius 4.0 cm when a curre q.4x5p4eub8be)da n , cwbxz:nt of 2.0 A flows in the wire?

  A solenoid 20 cm long ish5k9 uzdebm pmy+,( 1i wound with 5000 turns of wire. What magnetic field is produced at thmhbeki9dpu, mzy+ (15e center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a currezl+pc xx:ohb9d6)1 ;hc w j,qint of 4.0 A. What strength of mago ,;1qlc p h:9wjix zx6chbd+)netic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm lon ffk5edc+pn4 01cr tl5g to generate a 1.05l4 ftk1+ pe5c n0drfc-T magnetic field at the center?

  How many turns should a 10-cm long njg hv.esbth,w;fdte9 9(0p,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 sv kxpkh1n(wnk(6p*0 a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.k skn0p n*1(p(x6w hkv0 cm x 8.0 cm?

  A circular loop of wire of radiuod 15.hixejlh)d:i 6 ks 0.50 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 ej kil. 6d:odhx15i)hof the loop is perpendicular to the magnetic field?

  A circular loop of wire of cmt ,bindum0nls9ke r .;+ x.*cross-sectional 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 ol3 et p*eij*/of 2.0 A is in a magnetic field of 3.5 T. The loop has an area tle/j3*p*oe iof $0.12 \; m^{2}$ 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 cbuhnkqv6 5 xku a5ly4 +k /gsn2+65i;/l hcxxfield of 0.30 T. The current in the loopn// ikqa2c nh6 5;u5g 4u+ vkycxk6xs 5xllhb+ 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 v+s 4;2ft l6ihyj b6yqradius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magne q+ j66iy;24yb vhtlsftic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area 1rz7xmer,+jr fe9b+d $0.25 \; m^{2}$ 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-chargbots-(z6hg:qox; f;h ed 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 velov)pa))d*cf)1du ak wf city $6.9 \times 10^6 \; m/s$ 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 magnethdzcx24wy fa5qn 9nnmt)- 88 isf 1xa8ic field ow5hcnm qt dfx8f8za )a2x4n81 n9-siyf 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated fnr2*/j,4 uxfwosie9l 9*,hbf;2lbx ddjd 8k prom rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path itdel2 8s*rd*,nb ;k9 2of/xfw,updbihl j4 9jx follows.

  A beam of electrons is accelerated through a potential diffe7d /3 a/sqc 5 2d;miclqthy(fxrence of 10 kV before iddx7/5 ya ( fhlc q2sm/qt3;centering 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 undeflected?