If the north poles of two bar magnets are brought close tobgs-;u4k.c+h.qqtj m each other, the magnets willm4qg .b-uq;tsjc.k + h

  If the south pole of one bar magnet is brought near the north pojk u5gl 08/nivm(vhu ,le of a second bar magnet, the two magnets willg8 lmhj(u5 uik nv0/v,

  If a bar magnet is divided into,d ayfid;f 2.dk0 s8 yof7hjm;4 ym3de two equal pieces,

  The Earth's geographic North Pole is magnetica/rbq zng )uaof2:4svs3 la;i 9lly a

  The south pole of a magnet points t gamyk; *4os*moward the Earth's

  An electric current prodbwp 69azml8(yxzx43) wjbq g0uces

  Which of the following is codg v +pgdv)k75rrect?

  A vertical wire carries a current xho( kz x/r j27:g/syastraight down. To the east of this wire, the magneti(g7 kj2soahx/y/ z:rxc field points

  A horizontal wire carries a current straight toward yonvyt6 33llwp++rcq.5:7tsv z cavghkt( 9z8ou. From your point of view, the ma5zg cll(t+vsv693r n:a7w 3tcqkh z.y 8otv+pgnetic field caused by this current

  A current carrying loop of wire f 5f,o 4v(qy+en;xlgplies 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 current, outside the loop? The mag lo;qf g5nfxveyp(4,+netic field

  A current carrying circularmyuu9 3a;1h ri loop 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 causedyuu93ma1; ih r by this current, inside the loop? The magnetic field

  The SI unit of magnetic field c8zf(4e okayq02eqs, ,vmv7 vol)3 ei is the

  1 T is equivalent tojkh9)n+ (ms nn

  The direction of the force on a current-carrying wire in a magnetic field 1 ,ak tzjs2vs2vq+p:0pr/ta ris describ:r+apa p0j,1 vrssq2tzk/2v ted by which of the following?

  The force on a current-carryinuxxn:/l:tm/ e9f +mrj gv f3,ig wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic fiel to h29v0w;ozbd is equal to zero when

  A vertical wire carries a current straigsuq-jlqs, x5 u,g gk)(ht up in a region where the magnetic fieldsgjsxq-l ,5gq u, )(uk vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we ch:).2iuj 5 *kou uqrthan conclude tqohi*ju u:khu5 ).2 rthat

  A charged particle moves with a constant speed through oe;u/dow8l2 rf+bbr 4 a region where a uniform magnetic field is present. If the magnetic bew o+;8ulor/fd2 rb4field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant g+ 4n i.4,t5knwykjeh jysj8 -magnetic field. The magnetic force on th,k 8s4jjikejwn5yythg -n4. + is particle

  A charged particle is injected into a uniform m ft( 4j:oia0agagnetic field such that its velocity vector is perpendicular to the maga :ta4jg( fo0inetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circulamzcn w0f d 7e+yu0xv4/eq0jr5r path in a uniform magnetic fieldefmerx/ nd4wu0z+j 05 0vyqc7. If the 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 circular path in 5fi iy2xc17eha uniform magnetic field. If instead the particle carried a chaf251i yeixc h7rge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastwar2. kqlw kothy+7mr69rd at speed V in a uniform magnetic field thar726y t9.qkow lh +kmrt is directed straight downward. The magnetic force that acts on it is

  An electron has an initial v3 k+zi;03w) v av lgu1cy3xsgcelocity to the south but is observed to curve upward as the result of a ma zxkw3vy ; vu)g3c1acg3l0is +gnetic field. The direction of the magnetic field is

  An electron moving along the +:z lqi,t(j, s2:y mwy 58gjnf3c2udyvx axis enters a region where there is a uniform magnetic field in the +y direction. What is the d t5imu vdy::n 8w2glyzj, , yf3c(qsj2irection 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-carbf vhu.i:l3 f8x/no ;hrying wire is

  At double the distance from a jpoukep+5 sbrt 6(3a+long current-carrying wire, the strength of the magnetic 6pjset53 (+rok u +bapfield produced by that wire decreases to

  Two long parallel wires placed side-by-e/3vho(hez ( fside 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 you. From your point of view, the magnetic field at the pointvz 3ofe/((eh h exactly midway between the two wires

  Two long parallel wires pla.ndr-z2dgsl*t* uw8 v dq .fg(ced side-by-side on a horizontal table carry identical current straight toward you. From your point of vl n r*gdq.2-vs8.tddw*uzgf(iew, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of ipbcfep,, -a .the force between the wires is F. The ci,bap.e,pc- f urrent in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A ueg, qme0)ed+zoz5sg9 4bs* w/q6 l ezproton moves toward the east alongside and just south of the wire. What is the *m5zsg) 90 euqol6wz/e4 bdqse+ e,gz direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward td1o.ftj1rqevz 6g62pvw q15 1i;bfy o he bottom of the page. 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 tq2w1pvft re jv16zbyi11g 6 o;5oqf.dhe page, from your right?

  Two long parallel wires are placed iy rj4m15i+yne2bwn .side-by-side on a horizontal table. If the wires carry current in the same dii+ry1j 2 y5en.bn4wmirection,

  Two long parallel wires 5mefrfw+5ra; (vbe 3b are placed side-by-side on a horizontal table. If the wires carry current in oppmrba(vf w +b;er 553efosite directions,

  Consider two current-carrying circular loops. Both are k+pzyv;v d7; q0zy, r2igo0q dxcs;7b 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 fielzc;idr7qz,by k;dyv0g p q2; x7v0+sod 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 fromn083 h6y3s .rt pmfu8 eshnmn: 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 smaller loop, the magsuhs08tnmnn8f. yh:3r6 mp 3enetic moment of the larger loop is

  The maximum torque on a current caa727lp; yus tqrh6vh3z k4 0oorrying loop occurs when the angle between the loop's magnetic mo s2lyot q7h37k 6 zrv4p;oha0ument and the magnetic field vector is

  When placed askew in a magnetic field,)gbn,f8 ;1s q3sdocsg a current carrying loop that is free to rotate in any direction will experience a torque until1 ;d) sq3f,ssg8bocn g its magnetic moment vector

  What fundamental fact underlies the operatix/0*- ck2yh csrgom ,5qbu/ iyon of essentially all electric motors?b/rygmo x5 *uc s,h2 cyki-0q/

  A circular wire loop lies in a horizontal plane on a tab ,oqlg1cb(o y-g.2ywj jmjg3xf0b 2)tle 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 currents interaction with the mg-,yjjom. 2wqg0x( 1 blf3gc y)2bt joagnetic field?

  In a mass spectrometer a particle of mass m and charge q is acce1uy oos7lv vm29 e:;wplerated 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 particle. Derive an expression for the mass of the particle in terms of B, lu792: o spwvvy;e 1moq, V, and R.

  A velocity selector consists of a charged particle passing through crossed elb6:sapk ;3q7yum -oabectric 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 is directed to thesyb-o6uabp3; kq7am : 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 uniform mavww1,vew c rp*w(od 15gnetic fi,rpov 1wc5ww* vw(1ed eld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in e mes7 q3(xln1a 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 carryw cosa 701k (ne 2nfcv/j l9jr)g0ndx0ing 5.0 A when it is placed in a magnetic field of 0.020 T? The wire ma jk0cvoac f 0ng7els(2nw) 9djxn10r/kes 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 fielmgze/d)kx)zy1 euo4+ d of 0.10 T.e4 dgzmyx+/kuo)z ) e1 What 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 field of 0.2r8 c8ffx/, mjv0 T. What is the magnitude of the magjmx /c88rvf, fnetic 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 of c1k (o*4psy8ty6 cwigns 2 s*a$5.0 \times 10^4 \; m/s$ 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 s ldp9dl07yp h*pho )ps; ,mi(ipeed 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 sw *3/p.1gll,v3steo( gthrlp peed $4.0 \times 10^5 \; m/s$ 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 witws0) 9wu1wdtph 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 magnetic force of the electron.

  An electron moves with p qt ;.01n6pd duiqa)fa 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 m*) vbyz *gin1of $3.0 \times 10^6 \; m/s$ 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 currene36- chq*mf6m xxv *v2 tfp2ydt of 25 A. What is the magnitude of the magnetic field at a distance opv-ymdcmxq *fhv2 ef*23t6x6f 0.15 m from the wire?

  A high power line car 4no4e ifjed75rying 1000 A generates what magnetic field at the ground, 10 m awjoe4d75 4nfieay?

  How much current must fbr,v.*rf+gb u low 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 strdcu3ww;e70 .dq hcnlxvwh u v.s(.9l2 aight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strenge h s;v (w2qv..dwlu0 du3w.7xlc9hcnth of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wireso 8pmcufrji :xdn06-inl4-i) carry currents 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 j )o n--dlirc:mxpi840uf ni6that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in op3g j im),a(.sio 0w/5bc(k le ch,svtfposite directions. The wires are separated by 0.20 m. What is the magnetic tjwoigc .mk),,(sc5(fvbls3 he0i/a field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A ms4x cqr4ppldh0 ( *q5w .sdxl2 n)6alin opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wirmn5xd w4qqs46h2l(p*xa ) s l0. cdlpres the same?

  Four long parallel wires each carry 2.0 A in the same directio:d k36wan nqfi7 f8almgp,x9ucjll3wb( z.(:n. They are parallel to thzbl3 pflj(m3wnk::lgx ni dawqc ,a7 9 8(6fu.e 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 experience due to the other wires?

  Two long parallel wires carry currents of 5nwz1r 9wk/ ucx;n 8 kvg0a22jg.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find thnxk rw 0g21cz;8u/n2w 9 akvjge magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circula+*q4i:nzfq 7 nch7.pwzk 7hw br loop of wire of radius 4.0 cm when a current of 2.0 A flows in tnh. kqnb* +ifh 7 :wzc47pwz7qhe wire?

  A solenoid 20 cm long is wound ard1l ysgczg955 ci9a7f;fp 0with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a curren0y gz1 csrfafa5g7 d9p i;cl95t of 10 A flows?

  A solenoid with 500 turns is 0.10 m long a0;uqf mte0.ewnd carries a current of 4.0 A. What strength of magnetic field will it have at imqe00;efw. u tts center?

  How much current must pass through a 400 e(6upi :tq( pyturn coil 4.0 cm long to generate a 1.0-T magnetic fieldeuyi t p6(:q(p at the center?

  How many turns should a 10-cm long solenoid have if it is t,tv,e f 2ie8in29frqolo i0 0jo 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 carries 6.09yt 7f2drjty 8 -lb qe),if2fy A if its dimensions are 7r)jf-2 2yy,tdi 9bqlf8fyet4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in awap;hv0.z ko1p n)y4e 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 the loop is perpendicular to the magnetic fielhz ey04 ppowv;1ak).n d?

  A circular loop of wire of cross-sectin-f5+ (mb9 4grcs vjnmonal 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 ige/7t34uetg p s in a magnetic field of 3.5 T. The loop hgue /t g4etp73as 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 fi8h;ioeafd3 9usk+td;-9 /f0fz,rle2 no gpgseld of 0.30 T. The cur9kf/ dlns peo,u0; 9+grso a3 ed2f -th;fizg8rent 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.,2hi8wwa,6 zddg.h.md ln ya450 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is tgy4,m6 ,w aidd2 .a.dz8hhnlwhe magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of s ic(d0hz.sv0 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 par 1cw6m: n:f5 u wderwi)cw:w,eticle (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 velunzkc q.33w)lr; gr9 locity $6.9 \times 10^6 \; m/s$ 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 akeu 4(cl0 mz8v aby:p22i ylo( potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulao4i (pmy0 c(u z2eblyv82 :lkting orbit?

  A proton is accelerated from rest through 500 V. It enters a magn0n0 ko dfwq3e2etic field of 0.30 T oriented perpendicuqw0fd0k 3neo2lar to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potent2;;wgffdw0f h8l(h, gg s:+6oi by+ tt7cxvlpial difference of 10 kV before entering a velocity selector. If the B-field of the velocity+fwotbgl;( h27l68pxg wci f0 yts;:fgh+vd, selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?