If the north poles of two bar f0 2(ct m8hsevmagnets are brought close to each other, the magnets willshft c(ev 028m

  If the south pole of one bar magnet is brought near the north pole/xcm4z0e u qbw;a+8lx n s6c6y/5vdtq of a second bar magnet,dc5/y az4bwc+qu6vl /nes qx;6 m8xt0 the two magnets will

  If a bar magnet is dik/y tdg3m- tct +v4+afvided into two equal pieces,

  The Earth's geograph7oo ;q luk3b-9tf+t.n/ cmuqzic North Pole is magnetically a

  The south pole of a magnet points toward the Earth':99- j)hcdwofi r4 npjs

  An electric current prza ykxoac k3)5mz2 .p9oduces

  Which of the following is c994rd-ztgop u orrect?

  A vertical wire carries elu4,fg+3b smw5 blq7 a current straight down. To the east of this wire, the magnetic fieqb fll 5b,mu437+e gswld points

  A horizontal wire carries a current straipan s ya; +xu951npm)u 8a:fwkght toward you. From your point of view, the magneticyfap9uk8xm) ;1+5 swan :upan field caused by this current

  A current carrying loop of wire liqc 1olox-r) 8fes flat on a table top. When viewed from above, the current moves around ol )-xq81rcfothe loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loopbh7-aub,9lyp 504z+ke cz3z 4u dxcpy 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 ofc34cza5h + xze94 ,yzd7 bpkpu- 0yblu the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic f 7 -9 s0azocmfnz.g8wbield is the

  1 T is equivalent to-;n7 z /ikgyph

  The direction of the force on a current-carrying wire in a magnetic field is k51:wxx1 xh7oa oa 2wwng)aa3 described by which of tna11gxo)k w5 hx3a2 :7xowaawhe following?

  The force on a current-carrying wire in a magnetic field hjw.-9gw c)2 hcsj .eois the strongest when

  The force on a current-carrying wire in a magnetic field is equal to z yezl+ga y(a5h3a9 z.kero when

  A vertical wire carries a current straight up in a region qbca;8b3f r) : wwsrju4g; 8kywhere the magnetic field bk;3u j8yw:s8qr; gbw)4fa cr 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 thdr.(c *c o2oc.)s3kmo 0rlrbxis we can concludersrc)o0o(dkx32 o* c. .mcbrl that

  A charged particle moves with a c5pfec; itm03 constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upwarde;cpi3tc f 05m, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic hzouordgsuf/- */rhaq shv6,- :x1b8field. The magnetic force on this p-r6/g/ ouvrdhuo:-ahs f ,x*q hzs81b article

  A charged particle is injrkzo/ 6gd3fdnq j:e4)ected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's e ) j: /oq4dfgrd3k6znweight, the particle will

  A charged particle is observed traveling in a circular path in a uniform magn)) 2tqodlc h99v;r ;vw,;bwl) uw gkgnetic field. If the particle had been traveling twiqdrvbg; ;u,9hkwnww)gl))l;t 2o9v cce as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path izw; *)jrm92g cp:*pwz3icu; mm/bgd in a uniform magnetic field. If instead the particle carried wu9/r;iizjz w)pmcp2 3 dbmcmgg*: ;*a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves h7/ryycovd:q,m57d eno 61cs eastward at speed V in a uniform magnr5dyse 1cc7d :mhoqon 7v/,y6etic field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to r3h*+-xug tvw curve upward as the result of a magnetic field. The direction g*hx+ w3 -turvof the magnetic field is

  An electron moving along theh p ,:ma,id/xipbegvn 3-r t(iqo32l; +x axis enters a region where there is a uniform magba p2h:,md t-e/p; iv3rin lo(3xgi,qnetic 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.)

  The magnetic field producey9mv,lo9r 8jm g9j2dm d by a long straight current-carrying wire is

  At double the distance of1zy gu)814opi+hjh/ 7 fyg wfrom a long current-carrying wire, the strength of the magnetic field produced by that wire decreases tph/jgo14ifgu1 yzf ho+w87y) o

  Two long parallel wires placed si wki.t-(x 9+d1jrikdi mbg j3* ic5t5wde-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 away from you. From your point of view, the magnetic field at the point exactly midway b5jr*x1(5bt9k3-gjdi. md i c+iwitwk etween the two wires

  Two long parallel wires in: q aufjuc+my0/b,ej / .ky8placed side-by-side on a horizontal table carry identical cur0,e8a :y .mq+kb/jujicu ynf/rent straight 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 the force bet ohd * ulomz;5emy a16fm.bo68ween the wires is F. The current in each wire is now doubled. h om6z*5bo me.6yl ;f8 o1audm What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A 0petx/( u imo6proton moves toward the east alongside and just south of the wire. What is the direct(xt6/ 0o umepiion of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom qgy rn+wu+:y+of the page. What is the direction of the magnetic force it produces on an electron that is moving:nw y++yq+rug perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wire+ju9c lbmt4 6es are placed side-by-side on a horizontal table. If the wires carry current in the same 4 ut6 +lc9bjmedirection,

  Two long parallel wires +rnn1 o6svfie rez/7 8are placed side-by-side on a horizontal table. If the wires carry curre7 ervsrz8+o1e6 nnfi /nt in opposite directions,

  Consider two current-carrying circular loops. Both are made foei7lu.co5d *(d j74yzo c ;wgrom 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 c o c 7d5j4cy*;z7diuoge(lwo.enter of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carryis23re*3zzffg9b 0f8* tdsp:j yqzok4 ng 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 momezz *js 3qb: 48*eds20grok3yp fzt f9fnt of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a vf7 0bwvtew78 : fqdn.current carrying loop occurs when the angle between the loop's magneti nwf v7b8twq07fved.:c moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is frehy z 4ny93f)q2l 9hjjle to rotate in any direction will experience a torque until its m9ynl)9jzh4 f q3l2yhjagnetic moment vector

  What fundamental fact underlies the operation of ess9jge-k9 p*cx t2a*xim entially all electric motors? x 9 x-epj**2icmgka9t

  A circular wire loop lies in a horizontal pl788 qr)0qg8zreek m jhane on 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 currents interaction with the magnetic fie) 8qem erk 7jq80hg8zrld?

  In a mass spectrometer ++kg:vr ssq+6juqk 2aa particle 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 particle. Derive an expression for tgqvs2jsr+ u6+ k:+kqahe mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing e4b-2* qysa(is2wpp3c a/m y kthrough 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 f3wbp4a2yeq sck/ -m2ya*i sp(ields. 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 oft6py d6 , oa.i:4gsy.ir 6g jtgr4(gvx 0.60 A is oriented parallel to a uniform magnetic field i6rr dt 4jo6.6p :va.x,gy4ygg ti(s gof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directicp-f cia8fxu 1iyz t( 6*2+qno2zvgq l7v4zb3 on 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 placoum8tw7 sbl2cx,wr ) 8ed in a magnetic field of 0.020 T? The wire makes an angllcst )2x8uwr7m8owb ,e 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 ao7kv).y. lxu 1g25tmpti px.s magnetic field of 0.10 T. What mini)ikuxg2 l v..xy7p.tp 5 1tomsmum 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 fx ,relnf i/x n2em-2y1ield of 0.20 T. What is the magni/eim1 n2ne2x ryf-,l xtude of the magnetic 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 ou 8ov)/-bw)cdh qf o7wf $5.0 \times 10^4 \; m/s$ 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 speedxoj(4ulhc (b. 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 d6 7g4:bu7 otmer7aavwue 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 o0ap v)utmfq m31g gfm qp:g)xt5-b()mf $8.0 \times 10^6 \; m/s$ 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 7d. uxjibhgbx1ln33 jzan;fk:7jt/w6 ca; g) 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 ljx.ffwh- v: 3uzg90hof $3.0 \times 10^6 \; m/s$ 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 ct5ds* / d (q1a:hhidhdarries a current of 25 A. What is the magnitude of thsdhddhatd1 (q5*i/:h e magnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generat 3 m*yfrav l5y zf:/n*9meiv2ngvp3ddt2c q;) es what magnetic field at the ground, 10 m av5m zg9yn mfqy3dn)fv2v2ap l3id c:*r*t/ e;way?

  How much current must flow6(-n( g,rlo1km7oslbl*r brz 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 straight wire carry ie6,ej)0yc.-p6bo * yv35red+mcgr9r s me xying a current of 5.0 A is the magnitude of the magnetic field due to the wire equx6c,y0.me5) *pmo ryi3e j r-vry+ec9ge s6 dbal 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 oppo)pqt q21 tac/psite directions. They are separated by 40 cm. Whatqapq t1/ctp)2 is the magnetic field in the 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 20 Aa: l7egw8y 6m:kuuwula ly9(4 and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magywa7w kue mulugl: ya69l:48( netic field midway between the two wires?

  Two long parallel wires carry cu9br8ux hd 6 j*g3dli/grrents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wud83ibjdhx6ggr9/ * lires are the contributions from the two wires the same?

  Four long parallel wires eac n)(tluhi( i*a .: qzyqpc(yv7h 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 positione(py (n yu(ihl7q.a:vqc* z)tid 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 A jg ab0yfj-m4/i ;8gqqin the opposite direction. The wires are separated by 0.30 m. Finq8g-j am0jibq/y gf4;d the magnetic force per unit length between the two wires.

  What is the magnetic field aq8 nh s:h4h(7qb;hlln t the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in thqh;nq l h:87hhs(l4nb e wire?

  A solenoid 20 cm long is wound with :i47eyf-ui-iznlf w g+zq x9:l j /.zw5000 turns of wire. What magnetic field is produced at the center of the solenoid when a c:zz4+i-i yu. zif9qlf/l wj-: wx7genurrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m lonioyy+4 wsp7 y*r) eoh/g and carries a current of 4.0 A. What strength of magnet*+ir 7ohp/4) w yysyoeic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cwwj(i 0 w-okm **tvjo ai(j+4bm long to generate a 1.0-T magnetiwja+ (0 wv4 tobj(wk*i *omj-ic field at the center?

  How many turns should a 10-cm long solenoi/:n9uxof-y n qd 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 az;b2vx zj2g /t rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0bz2zg 2v/j t;x cm x 8.0 cm?

  A circular loop of wire of (krteby7 an,mf3h- 5 cradius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 n-,fk753teyhm c (abrA. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of:7 q(a:p hmidc 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 akwg ovc4)f4)z current of 2.0 A is in a magnetic field of 3.5 T. The loop has an area of k)wgz) 4 4vfoc$0.12 \; m^{2}$ 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 iwm 7bm h76mbdl0p omysfp:8;6n 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 parallel to the magnefo:8lpby7 06dhmmm6p w;b 7mstic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fiegnntknd:,.cimq3osc+luq (:sn .2( nld of 0.30 T. The ct3umn, sd:iosng qc:qknln . ( 2+c(.nurrent 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 wire loop of areaocv8 .as7 )5dp3ivzg8l oe-c b $0.25 \; m^{2}$ 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 gaf n5u u:*s) /tdf1eveyl:(p(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 wzg s*h3f7m5bl ith 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 intakq y dxozsa *r80;8,qo a magnetic field of 0.040 T. Whsx ak8 z08r,oyda q*q;at is the radius of the proton's resulting orbit?

  A proton is acceleratwdctnq7 y0 ;.-v+df)d/uy xs (c:llraed from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendi x/quc tads);d(c7yvnd - yw0lf rl:.+cular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is acce1 n bku (di /n.y9iuu2cqb)1xslerated through a potential difference of 10 kV before entering nq2xc (n i1)id y/.9uusub b1ka 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?