If the north poles of t apb:jeqkp:(yx c:qc9oc9,wv, (htw2wo bar magnets are brought close to each other, the magnets willppcqb9,woka2tv 9 (jc: y(:hw :qexc,

  If the south pole of one bar mafhg)soo +4 36pj;1e;zy bid c bbq2mt1gnet is brought near the north pole of a second bar magnet, the f+ tpz d y 4qbchb)mo6;21bg1ij3ose;two magnets will

  If a bar magnet is divided i u0;ew)d+k smpnto two equal pieces,

  The Earth's geographic North Pole gxskbqzka+tveep x2+7 d 03.(is magnetically a

  The south pole of a magnet poi)f7lbj jt-95a dcj8 bsnts toward the Earth's

  An electric current prod.0s2zn-ixah 2kak+; a (dcxtn uces

  Which of the following is correct?l+m/n 5-n sbbt/k a;qv

  A vertical wire carries a current straight down. To the east afa b3d ho7:vj3; lec/of this wire, the magneticj 7le fd:oc ;h3abav3/ field points

  A horizontal wire carries a current straight toward you. From you/igvbwao, 6 l,*l3tbjr point of view, the magnetic field caused by this currig*,6 l vot/ba,bw3 ljent

  A current carrying loop om jka6vpro ta46uey:4jd4.)q f 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 t4qydvj4.4u6ra ma: )e kop 6jmagnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a tabcp zt4 jyyrj-q:sxa;ts+) 3w.le top. When viewed from above, the current moves around the loop in a counterclockwise sense. 3ctr );y:x.s jz-4wjaspy t+q 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 : ggej5dtm4am 5c6 6ofgn4 im/the

  1 T is equivalent to40-tyf ck1dt dg x5 l3o5i9e,gy*qco r

  The direction of the force ongkq 6t lf0oxw)q96kpuomx1) 9b4 cms8 a current-carrying wire in a magnetic field is described by whicp tw)qx6l0gqo)1 bf9xkkom s8u m9c 46h of the following?

  The force on a current-carrying wire in a magnetic field is the strongest whe/ij;ci wx b, uvs2;v.k;4w5ce j7ohmpn

  The force on a current-carrying wire in a magnetic filr rc 91 mpq4:a-meog7+xes3neld is equal to zero when

  A vertical wire carries a cur* 4 -j;pig70q zs:oauyunjvmz 0./xnrrent straight up in a region where the magnetic field vector mx:p;j7 nj . r 0zqs a-z0o/vnuy4u*igpoints due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnejqzj 2z4sj d08tic force. From this we can conclude t802zzj4sdj jqhat

  A charged particle moves with a constant speed t )zb,phi w:ym6hrough a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be mamy:wbz6i, ph)ximum when the particle moves

  A charged particle moves across allhl n;v3d492 *n gqie constant magnetic field. The magnetic force on this3n;g94q end vll *i2hl particle

  A charged particle is injected into a uniform magnetic field such that its vm wsjtej47 28kbno; f8xzpbs:ktx. -.elocity vector is perpendicular to the magnetic field v7-n.zpb8: 24t8 xkxfj ob wm st;kes.jector. Ignoring the particle's weight, the particle will

  A charged particle is obsee/o )6hmh acm.2fs3birved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as / oib6mhfes2mch3 .a)fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in awmq 2s7ofgkmc8* ;t4 y uniform magnetic field. If instead the particle carried a charge of +2e, tsf;og8c7t yqwm2 m*k4he radius of the circular path would have been

  At a particular instant, an electron moves east,dbsdcj hx8vb8o6p0 x ( 6/zzvward at speed V in a uniform magnetic field that is directed straigh 6d 8dbhpb(v j,s/co vz806xxzt downward. The magnetic force that acts on it is

  An electron has an initiy-d6a q-kedo2 sr2 ,rfal velocity to the south but is observed to curve upward as the result of a magnetk edqoyfr-6a d2s ,2-ric field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a uniform mb2tnchhoiq41(m pan88 bn.5mt 4o-cdagnetic field in the +y directionc.hoci d 485nnh4bqn p a(-mt1tbo82m. 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 produced by a long straight current-ca)y;(jc2 ue4d lw. psqprrying wire is

  At double the distance from a long current-carrying wire, th17 m pac, zpkgun/;/hie strength of the magnetic field produced by that wire decrea ,p7up/m1z nikch;g/a ses to

  Two long parallel wires placed side-by-side on a horizontal tabgm;xzja4 l(i*x .,ypd6jm qj:le carry identical size currents in opposi lj *md6,4pjj;:im.(xyqazxgte 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 between the two wires

  Two long parallel wires placed side-by-side on a dn5q- ii ,m xkr*8vzbzsq8 (*whorizontal table carry identical c *i driqz5* z,(x8mb8knvwqs-urrent 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 betw*om b; h5ta( dwjrrj*1een the wires is F. The current in each tdw* r( mbhjj5o1ar;* wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the eas++g6zznw 6zy. mrour*lg6f 8x t. A proton moves toward the east alongside and just south of the wizf l6g 6.+r uo*6g8yznzmxw+rre. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a currentvn4fvo si*, (q toward the bottom of the page. What is the direction of the magnetic force it (v,q fosvn4*i 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 placed side- eel4;nd:n . qo29toauby-side on a horizontal table. If the wires carnoua 4t9.;q: l2oe dnery current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontall0 p3asm7 ekt* table. If the wires carry current in opposite directi3 ka*sl pe07mtons,

  Consider two current-carrying circular loops. Both are made from one strand of v07v gk2*qm qawire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field at v qqk*72vga0mthe center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circularti gz -uk-t8l0 loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other.k8 iut zt-0gl- Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when ty5ur ,q1p 4-jo(oo dobhe angle between the loop's magnetic moment and the magnetic field v1rooj5bqd ( p,y-oou4ector is

  When placed askew in a9:a x jwfurwiw9q8ih*p22 s,c magnetic field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment vecto:iw q89cw2rf u *,h9 saxijw2pr

  What fundamental fact underlies the operation of essslg)) wqy3 iyzd;1m is3cbi:2entially all electric motors?glqz2 ydyi):ics3iws)mb; 31

  A circular wire loop lies in a horizontal plane on a table and carries curre 6dgn ml)+bnt xt/zc;b-9(acg nt in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and di;dbxtn/9+lmnc (-c)gaz gbt6ps 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 partp, s 51u5z1- t szb)xcr8zn9p01y . kwbwlnvmbicle of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, wheren k5wzz5x 8 pl 1) rvuz9pn.cyb,1t-s0bsm1bw 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 a charged particle passing through c a 40uaf an(;cxnx) bv2uopb2061wywsrossed 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 magnitude yf024n wxa2xwbpa(01o6;u ascub)nvs 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 current of 0.60 A is oriented parallel to er4p i *80zjaep7hsq1 a uniform magn4 phq *0pj7s8ea1e zrietic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dihoskfv2gq5 r .rk)1(o rection 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 wk0y t crf1t)y4hen it is placed in a magnetic field of 0.020 T? The wire make c)tkryty410f s an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m lonjwsyj y;ps+h zgq5yhb o.- ;)-g has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current i);hq-y+h5pgyj ow sjs. -y;zb n 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 0.20 f*s6,vukw+mo T. What is the magnitude of the magnetic fof w+u,6m kov*srce 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 spee-5vo-;5d f *tmy-vjml mqr0bmd 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 :uzee.cam mo.2,kso/a 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 due np72ai*omy 5+yu0hxq oorth 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.7 ih;ndt imas u) :t;gyv8,nd 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 withfzh8zrhm u84 mrg2zu;6bc:3z 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 of fj))/c) dqiw *ukf r4c$3.0 \times 10^6 \; m/s$ 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 magnej02wpsiee4;8 9 eitv s; zvi(itude of the magnetic field at a distance of 0.15 m from wvsi8z i jv 409;ptee2 i;e(esthe wire?

  A high power line carrying 1000 A generam:fmlx( sx1fhapa, )p8154lykxxr c )tes what magnetic field at the ground, 10 m away?xcp pm81l4(1y:xl)f,r mx) axhf5ksa

  How much current must f cb:dtdv25 lmka*l7t, 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 straight wire carrying1sh:e.fyggnyd9h+kj3ed81gi n u 9 *k a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of abouhs+3kyn9:ig1 9*uegfg eh8jd.d 1nyk t $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. z0 tz *r)mp6lhgy.7vf They are separated by 40 cm. What is the magnetic field in the plane of the wires at a prgz6zpv l m. *0ty7)hfoint that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5ljfr4 748q 8uxe /wutm.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic fiel/4xrjue 478 l t8wumfqd midway between the two wires?

  Two long parallel wires carry currentszj q4 mfi7dn+: of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the+:dq jnmiz7 f4 two wires the same?

  Four long parallel wires eachfgh6z+ q pr(; 0lbt5qk 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 wires experience due thz0;qpl rg b(56qktf+o the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A irjn4 i/gs,3adn the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unid/ 4a nrsi3gj,t length between the two wires.

  What is the magnetic field at the center of a circular loop of lfq5 r)n vbx3o,p(lu/ wire of radius 4.0 cm when a 35ouq n)(l brfpx,/lv current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns ojm j09p .+rp6wt5jjwnf wire. What magnetic field is produced at the center of the solenoid whe9 p0mwrt.j j6j wn5jp+n a current of 10 A flows?

  A solenoid with 500 xza2b6jx4) m 1wh45ljxj yf+v turns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at its center?j4x )wlvx x1 5by6jj4fh2a zm+

  How much current must pass through a 400 turn coil 4.0 cm long to oi9g12ruvfyas33v u0 generate a 1.0-T vf 3g3arus vyu9 o201imagnetic field at the center?

  How many turns should a 10-cm long solenoid have ifx3 v( cn jcgt)co(w1d 6qh2k8q 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 loop of 120 turns that cycwb-a :/ fl78m:g nukarries 6.0 A if its dimensions are 4.0 cm xaknlgm 7 f:yuwc/-b8 : 8.0 cm?

  A circular loop of wire of radius 0.50 m is qp46 )v( mvcsv29 mfqxin 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 perpendicvp v9vf6(xmc)q 2s4mqular to the magnetic field?

  A circular loop of wire ofn/o v rpm9+3dom(: kzy 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 1 ;d spm*j *5p-9r5ikptcflsr a current of 2.0 A is in a magnetic field of 3.5 T. The lookt f iprp5mps;- s d*cj91r*l5p 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 rag5n;rqk-r jm sm 25;. 1 nuz8ndq/ p8rtygoh4adius 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 of the loop is parall8z gtknqmn5 ryg.u 5 ;ro8j4rq- dam2/;1sp nhel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0a 9s i*ibcs xyu5l(1j2.30 T. The current in the loop is 2.0 A. What is the magnetic torqbay si51(s2u9c x*lj iue when the plane of the loop is parallel to the magnetic field?

  A circular wire loop oj 7;m nca0t-dnf gi4q9f 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-charge u 9+mexlnaf+p,n :o6ed 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 velocity*8fi g x;zvw0rj 8f7mt $6.9 \times 10^6 \; m/s$ 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 mozh1t,ktxe .x0w-j d n w.6d+pzves into a magnetic field of 0.040 T. What is the radius of the proton's resulting orb w .h0n xd6zxwpettd+,j.k1 z-it?

  A proton is accelerated from rest through 500 V. It enters a magnetic fie )(x*akzl3v oald of 0.30 T oriented perpendicular to its directi zakxav3) *l(oon of motion. Determine the radius of the path it follows.

  A beam of electrons is acceleratez,xz6 /3fn4xg h 8zpvtd through a potential 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 z 8txph,4vnfz zx3g6/ the E-field is required if the particles are to be undeflected?