If the north poles of two bar magnets are brought close to each oth 7f/7v 4o7q( ubtm+fg9c8 esnlk 2mvwaer, the magnets wim qm/go49(7+s7 af2tbe8vufck v nw7lll

  If the south pole of one bar magnet is brought near the north pole of a secon: jygtl;uu+ p2d bar magnet, the two g; p:ul2+jutymagnets will

  If a bar magnet is divided 9:c +sqvd4ubm into two equal pieces,

  The Earth's geographic North Pole is magneti22 .s* wmposnuwp8im.cally a

  The south pole of a 5ntz9txzkgh g 8p7t n.rr20.qmagnet points toward the Earth's

  An electric current produ.g,tqsjq ko-+l5xid 6ces

  Which of the following is corre4zy ft /qcqc(9 vrhhrusn++,8ct?

  A vertical wire carries a current straight down. To the east of thi;qch j4se; knqzd*; ue/u 0ly+s wire, the mk4sc; ulq0 +; d*jy;quhne/zeagnetic field points

  A horizontal wire carries a current +b; v*ogi8d u /kk:) rjiv*hqbstraight toward you. From your point of view, the magne:8ihq*+kgu* ibv;r d vo/j)kbtic field caused by this current

  A current carrying loop of wire lies flat on a table top. When va,f:f9uzkb6 h0 yvhk/iewed 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 thek y 0fuav, 9fb/:k6hzh loop? The magnetic field

  A current carrying circular loop mm0 (gve:+3nmjb j,9 bforv5 xof 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 caused by this current, insi,fer 3 v(vm +mgmjbon j9b05x:de the loop? The magnetic field

  The SI unit of magnetic field is ttg e,ztw1gg n5c7o*.c he

  1 T is equivalent toetw;f vulln65+dql:vrlk )5 )

  The direction of the force on a currenq/w2 (,qva 4zn7 qft53wafap lt-carrying wire in a magnetic field is described by anq, (7tpqqa5f4v/fawl2 3 zwwhich of the following?

  The force on a current-l vi;e4/h edtsjv4xvika f(v73in2 c e1:f7;kcarrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal towl. 3h ryyyk7 p)wb7.b zero when

  A vertical wire carries a current straight sp-cgkj mw2737 b8tqx v i38zjup in a region where the magnetic fie3cpjk87 tqw-gm3 8zjxb is7 2vld vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. nb,mtx);ua w wj ,i5pn 9g2rn5 From this we can conclude that5nnx)u ;b,w, 59njw2apmgirt

  A charged particle moves wis:ta0k,3x ). yotrd mnth a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic f rd3,t0tk x.:)snoya morce acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant mpa,29gi95 jlfhfeyi ;)ac nt 8agnetic field. The magnetic force on this;jit5,9ef hi)a agl98 pynfc2 particle

  A charged particle is injected into a u26zec sz l9 flcf;7no8xlel70g7b+vj niform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particovcxfslenl 670f zcb l7+lz7eg2 9;j8le's weight, the particle will

  A charged particle is observed tramx 5sy.x*ii/tus 8en -veling in a circular path in a uniform magnetic field. If the partie /iui .x x85nsy*-smtcle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +j)o/1r32 nzd r.8m xybba yosb.r dy*n ,2dmr.e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circula.o*.yy)r3j noyx82da bbr2d /n.r, smb1dmr zr path would have been

  At a particular instant, an electronj zu(4 td* j9:ikapvi- moves eastward at speed V in a uniform magnetic field that is directed straight do-iaz( u* jj9k t:dp4viwnward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve up61g l)vvtqi-iy2 o lu)9,ejyy ward as the result of a magnetic field. The directivij 1l-)iy,oyuqe 29gl 6ty) von of the magnetic field is

  An electron moving along the +x axis enters a region whesu 5ii4 mg8fi6gc*lz/:w cwj5 re there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to rightfi 86i gsz:l4w i5w5jumcc* g/, +y up, and +z out of the page.)

  The magnetic field produced by a long straigm7 :byr4- cbovht current-carrying wire is

  At double the distance from a logv z t3e(5o )fdr2s/chtezp r *mb())ong current-carrying wire, the strength of the magnetic/v)ft 3sbm r)(gcehrepo oz *z2t)5 d( field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizonta1/jj2dr gat (f05 degll 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 gg5(jjfd2tl1der0 /a of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on anfbk-v + pd*s; horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the ps vkbp; -nd*+foint exactly between the two wires

  Two long parallel wires carry equaqvw;iw:a1, u5 o4me cig7 crn-l currents. The magnitude of the force between the wires is F. The current in each w5-uo1,:ven imwric q;7 ga w4cire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the eastbrvea bj/j:32 . A proton moves toward the east alongside and just south of je:/vr3 2b jabthe wire. What is the direction of the force on the proton?

  A wire lying in the plane o7qa3o7 8ee v06psey yiy9ia,w of-p ,sf the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendif8 sypwaa0 7qie6 9 vy3- ,eeip,o7oyscularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-si ;r*n1+rjynbgh :f r9i /px3dide on a horizontal table. If the wires carry current in the same direp:i1brr9n+f rgnx/ jd3y; ih*ction,

  Two long parallel wires are placed side-by-side on a horizontal table. If t 1ux cxe n) :;ukdjx- 7n:e*mi-s*wfhwmrc 8p/he wires cacx8)u -exn/ 1id swmj* kpucfhem :nr;7*wx: -rry current in opposite directions,

  Consider two current-carrying circular loop8p1n,jhb6xha0v n l9yl *f-nws. 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 smpl8h-1 l0hny6nxvf n9ba jw*,aller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loo(+htyo3p nvn5rca9s 2 gmrm;*ps. 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 moment of the smaller loop, th orgm arp;h+92 3y(tvmnn*c5se magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when thex zg )/oc0+nlheimrkq/ 4u- 3f angle between the loop's magno/ mgr c- zl fi)hxequ3nk4/+0etic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current crvs vt,tz5ihrf1 lt): om,3eqa1qn6 2arrying loop that is free to rotate in any direction will experience a torque until its magnetic moment 2nq3,r)vmo:, rl5 h ts 6eiatt1z1q vfvector

  What fundamental fact underlies the operation of ess3 -p7hufjdi-r,fut 9qu)c f;o ld0f4yentially all electric motors?3qf- yc rlu7op);dthf-d 0fi,j94uuf

  A circular wire loop lies in a horizontal plane on a table and car d.7e*uzuty9 ivsc, 4dmvi3c3ries 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 d, 3cv3itve794m* du yzuc. siinteraction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated y2 v.xdl( ntbnk57p)lthrough a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular pathn7p)dy(v .bxk2lntl 5 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 cy4xpg v9tkpg3ft71a ( 8kto+w onsists 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, and the magnetic field 93 okw7p(v1kytgt4t f+8axg p 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 par d( bhp 6tk2fx9c64zqw-xx4seallel to a uniform magnetic fx662 (d kzwftx9spb-44hxe cqield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directbriv7w ziw;(2blbuvhs.ue jps-6gj r/9(5/wion 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 rgnjt bsbp-ui;4ks77p 9.x2 twire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire maitgb-7t2u pbpk9 xjs4;r 7s .nkes 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 and6sh:znx db2 c9 is in a magnetic field of 0.n csx92 6:hbzd10 T. 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 uniforo.pj ht 6mueqf yvmn;s2*d8n,41x s 5ym magnetic field of 0.20 T. What is the magnitude of ytqumn sdm e.5xhy2;n1*4j ps6,f8ov 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 db1tqq7l1q;il tn-z -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 speed of fi1o0.v0cxx j $5.0 \times 10^7 \; m/s$ 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 u;nv*c 6, lm zzxw3i:zspeed $4.0 \times 10^5 \; m/s$ 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 ai, kg6nmbh ahber 9*5- 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 ap t 7f0px2xg:ze;p0b* y:kkqk 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 g ldpp;,n(my* of $3.0 \times 10^6 \; m/s$ 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 magni h1j//ruuxg;gx(so3 :moiox: x w(p5 atude of the magnetic u(rxgi 1 5xs(oxj u /ah;gxpwm:o/o3:field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A4z i51fc 0pyfa.uf) so generates what magnetic field at the ground, 10 mcf fp.) 4iauf501ozsy away?

  How much current must flow 3jh-(tba c51h o stnfgf 8),btfor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carryin+iqj8yxqf. nylw, rx5 u q8n7)g a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth'yfq7+ nriqn)u yq5 ,lxjxw .88s magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in oppo 0p+b h:-ayyhmsite directions. They are separated by 40 cm. What is the magnetic field myhh0 b+ypa :-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 A and 5.0 A in op1w97 ok 49 mh8) h)h-tuskhtrnz c;ncrposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the two 9hsz;)nknh7 rc9 8tmu )rh-1 wh oktc4wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite dire2m5vzhly 5 ;xkctions. The wires are separated by ;h 5vl5xmkz y20.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each nws (p)ok.sc tk96eac n b5z;);oxy-p 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 magn ykt6os9cpbc.oz; k ; n)na)s( -xew5petic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A andb4 gy sm8is */4+cqus jrd0y-w 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magneticu44c0 *m-sssqb +8dwy/irj yg force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wd .ux97s6s fvoqtg *w h znqgn3+v.1n-ire of radius 4.0 cm when a current of 2. d.-7vs*q 31gghtu6wqn+o vn9.z snxf0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magn9oc(xw 9i1 gdietic field is produced at the cente9g( wcix1id o9r of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long :)rc/ v4hqjhh and carries a current of 4.0 A. What strength ofqc r:/hjh 4vh) magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cmfbqkvzfgy )p98-vq+e+us: 2m long to generate a 1.0-v2f9 g8 :seuv -b)fypqzk+mq+T magnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to generatc/t.1 lrjxg+yi r5p3 te a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a re t3:m hr2co2guctangular loop of 120 turns that carries 6.0 otcg22 h3mr: uA if its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform mawhvm2v c (u1 sbh-xh,/lc:u-d gnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magneticc b-sv 2x:1luuvc-,/hdhhm (w torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of w tquqcdbp1fg2g( dew:.6mz7t 1-ut6 kire of 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 a current of 2.0 A is in a magnetic field w mnocb 4t5wt.f-d;ojm:5dy:-l l7klof 3.5 T. The loop has an -4jwn:tlty5-md;ld 75k blocofm. w: 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 f 3 m+/khc* gnj-5t.jqldk8iz j1lcmm*ield of 0.30 T. The current in the loop jq.+j*i* nz 1dcl8mk5 h-3lt /kmcgjmis 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 0.50 m is in4y8(ef6x uuys5yqk c1 a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What 5 fy sx4(ke qcuuy18y6is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of areas*j7:/k rkszsc i+,xv $0.25 \; m^{2}$ 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 (j3u 7,d/ggji, 8ejbst 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 witjez3 h+zuh 3c*r0o:x h y(0ledbr6 l;vh 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 mah+zmjg 8b, p ;z6 gpkpop(.jq)gnetic field of 0.040 T. What is theqzpp kz6j,h.g b;m)p8gjo+ (p radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fidn k37 gksui+w/5n3dq eld of 0.30 T oriented perpen +3siddwn 7g kq53knu/dicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kpek5w d1i* m*kV before entering a velocity selector. If the Bi*k5 mwke*d1p-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?