If the north poles of two bar magnets are brought close to each other, ul (1gtl0fq2ht4a +( i(yhjafthe magneaf fu(+0ta (2gjq 4l y(i1hlhtts will

  If the south pole of one bar magnet is brought near t ufqjxi,0 5tt0 ej/q8oq kd5i k2a7xt8he north pole of a second barax jtq2i/8f ,8 odktktjq0exq5 u5 i70 magnet, the two magnets will

  If a bar magnet is divided into tw 9 x92)zc+dik7rm bnteo equal pieces,

  The Earth's geographic North Pole +rru (c,sbm,mab6*js2h s /d1 9tnen cis magnetically a

  The south pole of a magnet+h1 z q*c7iuea;zgrk3 points toward the Earth's

  An electric current produ8hu iy0dfqs i):y71 o mp4)eglces

  Which of the following is corr fy(v6 to ;kh;+usyai0ect?

  A vertical wire carries a current straight down. To the east of a3m,jcq ( w r++rurqid45h y)kz05rwythis wire, the magnetic field poir53w m,kd0uzw+5qjr+)rriyhc( 4 q yants

  A horizontal wire carries a current straight to2 5*hozcw;z hnwzdg)*ward you. From your point of view, the magnetic field caused by this cuw )h z5hzn;*dzg*ow2c rrent

  A current carrying loop of wire lies flat on a table top. When viewed fr,lxm 2afil .db 1,msy)om above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside th2byilf,m )l 1ads.,m xe loop? The magnetic field

  A current carrying circular loop of wire lies/g :+ivb : : hrzgc)im. x 93lbyzlv(x6eb:eix flat on a table top. When viewed from above, the currenr gme+vxbe(:zli.v9 :cg3:b6 lbz)yx:/ ixih t moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnety /;76qm cm:pfci/- chkx0 fktic field is the

  1 T is equivalent tonr * ;1z-klbvu

  The direction of the force on a current-n,hkr.)1fd ta carrying wire in a magnetic field is described by which ofk,a )1dtn.fr h the following?

  The force on a current-carrying wire in a magnetic field is th* .gw.p j.mez5s:qnjzumx20 r7*d evhe strongest when

  The force on a current-carrying wire in a magnetic field is equal t,xz ewo ubwi*b-i-g5:3: q ctko zero when

  A vertical wire carries a oyxt:w wgvz(gf9g :65 current straight up in a region where the magnetic field vector points due north.zy ogfw9x6gt: v: wg5( What is the direction of the resulting force on this current?

  A charged particle moves and expe ekm6sehyk +h8l u1b27riences no magnetic force. From this we can conclu2m7hshl+1ub6k eye 8 kde that

  A charged particle moves with a cons:j5j-rnl7 d9 8o4p7jjlfbm;rz y v7va tant speed through a region where a uniform magneticv-b4 r7 mzjvj7 5lynprl ;jaoj:89df7 field is 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 field. The magnetic forc3ws8h qr )s:bge on this pa3bsq w8 srh:g)rticle

  A charged particle is injected into a uniform magnetic fie 0lr8k)m)kys00:1qyd qa o1vs q-rbwqld such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the parqwqqd80a0k s:)vsb1r0r1y ok-m)q yl ticle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform ma hm2+sy9lmz +ignetic fi z9ml2++isym held. 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 a un):h okrctb(6a iform magnetic field. If )(hcot6k b: arinstead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastwaqmgsi (az1t *dg.:mt3 rd at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts dgqm :.i 1 mt*a(s3tzgon it is

  An electron has an initial velocity to the south but i x0,hgouw0h6 hs observed to curve upward as the result of a magnetic field. The direction of the magne h6,hou0wgh0x tic field is

  An electron moving along the +x axisc71 z 0q 1vaykktiy:,su *yd4g 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 out1,qkkzg1*y 7y0itvc:s y4d ua of the page.)

  The magnetic field produced by a long straightg1:e p38s)::evjabrb0jca 5pyox,ahkk e2 c( current-carrying wire is

  At double the distance from a long current-c : c bvfp3+1rmb:6kw jmhj/7juarrying wire, the strength of the magnetic field produced by that wire decreases j:pkj+v uj/bb:fm7wrh31mc 6 to

  Two long parallel wires placed side-by-side on a horizontal table fc6jkwd,* al j*i*3wkcarry identical size currents in opposite directions. The wire on your right carries current toward you,i* kj* jcw*wd63fa,kl and the wire on your left carries current away from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wird6ui o(utu gmz8,;gp:a*t2dkes placed side-by-side on a horizontal table carry identical current strzggo t:ud;udt682u,k*(m pai aight 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 magni2 kzwk2*+nvq7wpug h7 tude of the force between the wires is F. kq n2wpwkh+27u7gvz* The current 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 m+uf3-6w6k twy3ctel 7o 9)hxgxr y6c3u xf6 oproton moves toward the east alongsid7 txeuffywhmku y66-93+ )3ocglx c6xw6 3tr oe 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 curr5 c qufh(;i1h pl);n*dq6wlz fent toward the bottom of the page. What ihlch6qq(u)l 5;zin*fdp; wf 1 s 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 place6k. gv ptsgan7(:zld/d side-by-side on a horizontal table. If the wires carry current in the ( v.tnpgsa/zd6 lg7 k:same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. f ey3;(3ug ysoIf the wires carry current uyfoye 3 gs(;3in opposite directions,

  Consider two current-ca )sh :b44hex, zv3jqfdj82enprrying circular loops. 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 the8jnvbpe 4x) 4,d qz2 sjhf3e:h larger loop is

  Consider two current-carrying circular loops. Both are m;dys stu 9-l.hade from 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 magnett 9s-l.uyh ;dsic moment of the larger loop is

  The maximum torque on ab7x-idgzfty7 x9 +iu 5v..qes current carrying loop occurs when the angle between the loop's magnetic moment and the magnetic field evq i.+uyig7.dt 7sfxb5 -9xzvector is

  When placed askew in a magnetic field, a current b..nnbgs,it3p 8+oy scarrying loop that is free to rotate in any direction will bn8i+g b t.so3.,pny sexperience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all ele +ccgehl j)v04ctric motors?)e4v c h0lcj+g

  A circular wire loop lies in a horiio ;0;llhay6 vzontal plane on a table and carries current in a counterclockwise direction when viewed from abo;a 0vyli 6lo;hve. 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 particle of mass m and charge q is accelerated tq,:gc/eq;ek)a/)0xu3s)b qlq qk bc ohrough 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 partic b a);/3 )qk/qcqox0egqlsc:bq,e)ku le in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing rp05z :di/bu3qfokb b,l b; a+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 v p,+ bkil;uqba5:bf 3/0z rbdoelocity 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 a*xsdw7q9 9id of 0.60 A is oriented parallel to a uniform magnetic field s9x*7d wq9 aidof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current ofnaiq1.6b8 ain 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 *sju/ ja0y a w 8mlly8hd.di2.meter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020ad2 ad i*0..y8mlsl/yjh ujw8 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:byajam11ev1 zjn 21a is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to 1aanv21amb:yj je11zcancel the weight of the rod?

  A stationary proton is in a uniform magneti+kri dq6zgw )i/zq0q 2c field of 0.20 T. What is the magnitude of the magnetiiziqz 6 0qw2g +drk/)qc 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 a86 1c9wtdfr2slc lv /q 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 ,,tng6 )it :hbmk *t0qmwim. w-p bj-la speed 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 dur3t jadxn2m3(e 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 speed 3 eo1sml3 5lkqv3 n57lz(fvrgof $8.0 \times 10^6 \; m/s$ 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 witx sk;c0z5-ge plk8 vmplo+vw-(;kjc 8h 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 ofh.8q 4ts k/pos2 ;loervij7*e $3.0 \times 10^6 \; m/s$ 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 j;+x3vh hfw4tbs/58olbnvf3magnitude of the magnetic field at a distance of 0.15 m fromf4ow8 f;sv xvl5bjb h 3hn3/+t the wire?

  A high power line carrying 1000 A generates whah.gq -4vdi x9qfbu 0 jch3lyd;4/ t5kv/hk8jz t magnetic field at the ground, 10qklhv yx;59h qid /44k 3cv .j80 budf-htjzg/ m away?

  How much current must flow for 7dar2i5 lz*fxo.c)s y$1.0 \times 10^{-3} \; T$ 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 jt9wl88qebw ,wb-ju8 magnitude of the magneuwqb8w -l89jj,w8e bttic 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 opp qbi ;ip:r7(3zdi7cj/ag q5ddosite 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 wire and 60 cm prdc ; jiiz(5d q:/bqd77aig3from the other?

  Two long parallel wires carry currents of 20 A and 5.0 pfk3hmg /b-6c A in opposite directions. The wires ar36hp/g bmck-fe separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents uw )a ljrxr* ue-4e,1vof 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wv ju)wru4xla*-re,1e ires are the contributions from the two wires the same?

  Four long parallel wire00zh: ,jitgp/ zwxma2 tze:5 rex5oe;s each 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 magnetiz:i/o w :x5jexg2pta,t5z00 m e; rzhec field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 An qkedw87omur8v l7tw4pum69d0; uo 6 and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length betm q78 ew;4 m9 0d6d8vw 7rtuouplukno6ween the two wires.

  What is the magnetic field at the center of a circular loop of wire of rad+d,fglpu z-*iius 4.0 cm when a current of 2df,u* i-pg zl+.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnfb)bayb nua4 ):x1 rkop1/cz -etic field is produced at the center of the solenoid when a current of n1c 4ba)z: y) af/ro-bxupkb 110 A flows?

  A solenoid with 500 turns is )or2b0l 8g o0/foxhppz1r,tv 0.10 m long and carries a current of 4.0 A. What stren1 0hbov8gl2xo0/r,p pof z) rtgth of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate o0.qef wk/t8r a 1.0-T magnetic fie/r kq8 o.0twfeld at the center?

  How many turns should a, ,mfl oxp8s:s 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 rectc(wx fj0 7tw2bangular loop of 120 turns that carries 6.0 A it7fcb0x2(w j wf its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m i ;i:sa4sf0 dcis 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 of the loop is perpendicular to the magnet;:ss4i 0dafc iic field?

  A circular loop of wire of cross-sectionao)u t.o7c0li()2gqc1wu km qcl 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 carr 9:qu ed+ksz7pying a current of 2.0 A is in a magnetic field of 3.5 T. Ths9 :kp dequ+7ze loop 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 magnc o0w uzlua77)etic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque )ouualwz7 0 7cwhen the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a unifonmw:)v19cgqlb 24u lkrm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the cv2b4l um lqwkng1)9: plane of the loop is parallel to the magnetic field?

  A circular wire loop of area sd/(,zf/ c;32wi)qzcwohmo w -8 yrgc$0.25 \; m^{2}$ 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 particl-r2p2 q 9bajk4ybjc a6zn.(dge (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 wi8vett du)9s;3fx8 e2g +wdhrfth 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 fl o.3zh:pwkgwy17l i-ield of 0.040 T. What is the radius of the proton's z-1 .3lk:wy w7iohp glresulting orbit?

  A proton is acceleratenevsue73,wimti )2-su :z5mdz4s fx *d from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its dire)znmvsf :ts u5 7 esm3i,i4dwzu 2ex*-ction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through 1mtlu/5uzp6wan: -a l a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.01u-:m zwu lt5a6lpna/ 10 T, what value of the E-field is required if the particles are to be undeflected?