If the north poles of two bar magnets are brought close4-0b t/v*4aeq:dwsibdj uixq c7 :na2 to each other, the magnets td-q*aev i4wb a:x 7:ubsi4/0cdqj2n will

  If the south pole of one babc0o7kym: x89t0 dspzr magnet is brought near the north pole of a second barkts :8dx7m00 cpz9oy b magnet, the two magnets will

  If a bar magnet is divided itvt 09ib8ngsw6nx1 fm2 lsu -,nto two equal pieces,

  The Earth's geograph 1xpqzpw n;9 pcb -esw;00)vnbic North Pole is magnetically a

  The south pole of a magnet ec0 vgv324n0:uoxx 1oq9 mpq gpoints toward the Earth's

  An electric current pr /h9h 2n+8baxtrd/w)mt-yi bioduces

  Which of the following is corrb ,40w9 sg3fwje*ds k;z5phzfect?

  A vertical wire carries a current straight down. To the east of th qsogr+7zwbuzej (.82 h:yp90 vu*s fuis wire, the magnu w+ o* p:zzr7sh. euu9jyq(vs0gf82betic field points

  A horizontal wire carries a current oy 2 s uwsi9f, l9c;5t*j7mb4tpcwdu2tyon2- straight toward you. From your point of view, the magnetic fio; f2 uc9 sttj-tww*29y7 si4c5l ,yuo bpdm2neld caused by this current

  A current carrying loo*pjx hsl39 8cr+z9rr ep of wire lies flat on a table top. When viewed from above,rpzl39h* 9xrc8ser j+ 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 magnetic field

  A current carrying circular loop oj)+ r wm4y0wn wg :5biv,2ydoof wire lies flat on a table top. When viewed from above, the current moves y)rn ovw5j 2 gdwb+:w4im, o0yaround 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 magnetic field is the qi .gtqx+mv*3( mdp-e

  1 T is equivalent toeryvq dy3 gqq7/e1z*(h*( mop

  The direction of the force on a current-carrying wire in a magnetic field is desby8(v a.0ikvl cribed by which o(v8 bi .yklav0f the following?

  The force on a current-carrying wire in2 w9upwu0u5grof d1wohl .+y + a magnetic field is the strongest when

  The force on a currentf0 3* i/(q,tveis4h1 pa,siv gv h(iam-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magnetiv.0 vhrqb)cj )c field vector points due north. What is the direction of the resul q bhvcjv))r0.ting force on this current?

  A charged particle moveshf 4,8x puiz2n and experiences no magnetic force. From this we can conc4 8nhp2,f izuxlude that

  A charged particle moves with a constant speed through a region kdmz8uk0(doy4b e8 5x*vo 0lj where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic forcezodum*504jk yb dxvo(8 el k08 acting on this particle will be maximum when the particle moves

  A charged particle moves arid; ihsfxhb9/gi65 - cross a constant magnetic field. The magnetic force on tf-h9 xh5r / g6ii;bsdihis particle

  A charged particle is injected into a uniformfwawieu -*+6 w magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring wwf-ue+ iaw*6the particle's weight, the particle will

  A charged particle is observe gu+r i+che n)et8hr:;d traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the ct;hrurng+:+c )i8 e ehircular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform magne1-,lpjkyax 4etic field. If instead the particle carried a charge op- 4xk,ajy e1lf +2e, the radius of the circular path would have been

  At a particular instant, an el fh d,t3 (/klslb ol j+2p9l ,xesn/v-n5zhcd2ectron moves eastward at speed V in a uniform magnetic field that is directed sds(flb+5j ,el9tlv znoc3n2kx, - d/hhlsp 2 /traight downward. The magnetic force that acts on it is

  An electron has an initial vel* bn sl/bo1xl2c)/t cax, xf,j-tx ei(ocity to the south but is observed to curve upward as the result of a magnetic field. The direction of th ixt , (2lccjl-)no,1*/x/fx ebatxbse magnetic field is

  An electron moving along the +x axis enters a region9jv;zfa.aa( qd r+g2xs0cp y7 where there is a uniform magnetic field in the +y direction. Wh ;sd axaqr(a9 f vpz7ycj.0+g2at 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-carrying wikfxs6sa90vuz( r5ja 7 re is

  At double the distance from a long current-dki pfibgs 7(4+v))vyz.gyc 6carrying wire, the strength of the magnetic field produced by that wirek6)v sg. vicd)byp7(+y gz4fi decreases to

  Two long parallel wires placed side-by-side on a horizontal tl5hl5kzzl 9 s.vk6vrpy2h t6*able 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 exac hykrl5 z.h66 tv9pz5s2vllk *tly midway between the two wires

  Two long parallel wires placed side-by-side on a horizonta 0z6sxealm49jn p dtc3 t7/0t, je9sxrl table carry identical current straight toward you. From your point of view, the cl3jnjss90a / 4xz6pe7e,d9xm rt 0tt magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal curren*a7j l/j jncy,ts. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the nelny*,a7jjcj /w force between the two wires?

  A long straight wire carries curdaqr1 -gt30hcralby .2p ,.pp :j4j mmrent toward the east. A proton moves toward the east alongside and just south of the wire. Wh jbhqr.:g.2mtpaajrcm 4dp -, 0l31p yat is the direction of the force on the proton?

  A wire lying in the plane of the page carri)u3ttu:kp *saw./cjyk (z bu c6cw7e -es a current toward the bottom of the page. What is the direction of ty:3-cbuw u(kcu*/tzwc6t7 )ks ae pj .he 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 placed side-by-side on a horizontal table. If the 4zvu xqx83kzv+)y-n o wirx8+4kxz 3n )zq-y ovvues carry current in the same direction,

  Two long parallel wires are placed side-b wp:3gfjv4.+ul owh::hg; xkoy-side on a horizontal table. If the wires carry current in glo+4;3.ujhp::gwwhx :o f vkopposite directions,

  Consider two current hsrh-5* uld 3-vaivll,y x(p5e /et*a-carrying circular loops. Both are made from one strand of wire and both carry the same current, but one has tv,uphse lyl5ar /*exi-a d3h(lv*-t5wice the radius of the other. Compared to the magnetic 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. Botl,gd gxp2, v0ss5oyfz.d.u9 eh are made from one strand of wire and both carry the same current, but o.5, s 2fdgl oyd0gs.9,uz pvexne has twice the radius of the other. 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 the angle bet.a jfcpme ; :47bmti) ,vu*pwjween the loop's mag a),7timcfmw;:b 4 j pej.vp*unetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop thae7annl3 t5,y .xzmu4ct is free to rotate in any direction will e,mc ux.37e4nalzn5t y xperience a torque until its magnetic moment vector

  What fundamental fact underlies the operatio6cq6o0aoed0j-rz +xnn of essentially all electric motors?eaoo zqxnj6-06 crd+0

  A circular wire loop lies in a horizont,)g .u wqoy)llal plane 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 ,wu) qllyg )o.magnetic field?

  In a mass spectrometer a particle of mass m and charge q ijs1osrc 8 /ti mh+em*6m.7 yfrs accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular p.yh crmj1e/8orsm7+simft*6 ath 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 fkl zbec 9/;7tgt8od-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, z7t k/cbt9lo8fg;-d e 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 r fr;2o o2j/ihis oriented parallel to a uniform magnetic field of f2h/oi;2j ror
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curr+;)je+epmf3fl gx5-1vte wj/yv c p4ient of 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 meter on a straight widg ktllzw6kmoal.4a.k 37t**re carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire k.mwtl .kaglotaz**l476k3 dmakes 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 magneticlxwy*dj1l( b . field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weightd. *(ylb 1wjlx of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the mak 3 oo.;oefew.x*wy/ q-r1ptsgnitude of the magnetic fo..yo kw f 3rs ;-/pxqw1eto*eorce 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 ascn8fwkh oj 7*nw*6-iwgi 7 e. 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 a yr zw,ty1 q/sce1hc+4speed 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 s8ed4: +1aq+6yrn e6l rnsgvb npeed $4.0 \times 10^5 \; m/s$ 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 s qx 5 )/6mljxbyehro42peed 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 or5fs: ym59l9xmtr p1 q)9, xbn0k jhudf $8.0 \times 10^6 \; m/s$ 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 na s:ngvhy 3t q7*be61$3.0 \times 10^6 \; m/s$ 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 1r2dmh(5sj c+ mi6z drwire carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m fromr1szj6 2h drc m5id(+m the wire?

  A high power line carrying 1000 A generates what magnetic field at the g. )vk (x jzqi)y8j.t(iaum66yxath;j round, 1k(;8.a )ymua 6j )zy xtj iq6th.xi(vj0 m away?

  How much current must flow fobymr du8p+l gi nai6 c4-s5g+so *sk23r $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long g -:m w*)7kw-t i- m;qcv8ankq4wvecfstraight wire carrying a current of 5.0 A is the magnitude of the magnetic field7a- 4mv k* ;tkcwmwqn :-iv)q8-wfgce 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 currv5q;r 9 d/. 2rm5xifp23h s3dtuqaejjents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in thj r2r/ f5 ej2xsp5ud;q. t3hidvqa9m3 e plane of the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wirc0f6r q0ev: bjes carry currents of 20 A and 5.0 A in opposite directions. The wires are separated cjbr0q:6ef0v by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite dirj1 dflhw9)9x jections. The wires are sdwf1h)9 ljj9x eparated by 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carb,6+b,igp-l8tlxr/-0v n:f mhg qj v try 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 4ij, nl8t:tm/ 6, rlpbb +vv-gf-qg0xh .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)imocxxqg6/j,-lx4/ sr pgfz2f p)7a carry currents of 5.0 A and 8.0 A in the opposite direction. The wir/z )g7c,s)pgx-o/xjm afr if6l4qx2pes are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circularr ,l,6sf m (oo6njrol8;p t35o3trl nj loop of wire of radius 4.0 cm when a current of 2.0 A flows in th,o l;jt5mfr plnso(j6l rr3, 8otno36e wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic t;y* +grt o)om8aj-xno2t:wf field is produced at the center of the solenoid when a current of 10 A flows? )r8t :gn2* +jtxfyatooo-;mw

  A solenoid with 500 turns is 0.10 m long and carrld+ku -7qk p* uu+x c-rww-o,hies a current of 4.0 A. What strength of magnetic field will r+dhx pku,kc*-+wqo-u w- u7lit have at its center?

  How much current must pass through a 400 turn coil 4.0cpqcy hx1- ibo/ l);jb,l)1tj cm long to generate a 1.0-T magnetic field at thlyb p hq-j;c1j,1t/x b)i)cole center?

  How many turns should a 10-cm long solenoid have x pe;l9u+ ewmq,d p 40g6pj s:30b kag5k5pfadif 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 carries.b -ks/0obahr8atpl0 6.0 A if its dimensioos. h0pb-lk/0 r tbaa8ns are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic pghd1kw1 ,0uext- u2 vfield of 0.30 T. The current in the loop is 2.0 A. What is the magnet 0dt1eu 2vu1-kghx,w pic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-section2l py6nbb/:t y, +: ppfdxrg7xal 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 is in a magnetic 58bc-f+ 8cbj oxxilx rc+l;2sfield of 3.5 T. The loop has an area o8cxlsb xx c rj-258lb ic+f;o+f $0.12 \; m^{2}$ 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 z x vo lfgvem98 .8o,mjva :e),om5n8kuniform 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 i,mvfo9vjka8v8oeenl 8 .x 5,omzm: g)s parallel to the magnetic field?

  A circular loop of wir+mhd8 oi b p3/v62vdtqq: 8/ badvwgm0e of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in+8w m/ dvpi3b dva:ghq60 m b8v2odtq/ 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 area gr)v/ mu)dhyoilbg 9, hq*3y: $0.25 \; m^{2}$ 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 3e yl,og . z.5 31nayfsri5kev(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 velkgmvnr55ve) 5r ew(u(hdr)r0ocity $6.9 \times 10^6 \; m/s$ 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 aja (l3n05 nopix,y2q u magnetic field of 0.040 T. What is the 2(q3 5 inoyp j0a,unxlradius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. Io bi nw-3oc2i8t enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. D8 oo2-n3ci ibwetermine the radius of the path it follows.

  A beam of electrons is accelerated through a potentwb67 ;4 j8n6bciwzh; isd f)/ pdp)zd+-ynylaial 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 the E-field is required if the particles are to be ud byfbh zwii-paz)) /; ly wd+p8d n;s67nc6j4ndeflected?