If the north poles of two bar magnetsbsls 8m 7j s7b*oaq.o+ are brought close to each other, the magnetso7*m8oq asb .lssj +7b will

  If the south pole of o0,crr1xq/e-gjp8 b ukne bar magnet is brought near the north pole of a second bar magnet, the kepq ,j/-gx810 cbru rtwo magnets will

  If a bar magnet is dividxxo; x/j 5yp/wuo/o r62p0ozled into two equal pieces,

  The Earth's geographic North Pole is magneti f1.mbrtrfc8g v:g( x;cally a

  The south pole of a magnet points towar p2nf88p,w k ns1;6 +khdhpwqxd the Earth's

  An electric current produceswe:c9y ;n t2yhz;9qs b.ii;fl

  Which of the following is cori 3fft/(4ypk:pd1k fu rect?

  A vertical wire carries a current straight down. To the east of thg6425emt z q,d+l qzocis wire, the magnetic 4d+,l25zem t6 qqc zogfield points

  A horizontal wire carries a current straight toward yhlk 4(5 j1/7cze2enz v e*aeldou. From your point of view, the magnetic field a/7de e4e2n1 kz lvj(hc5e zl*caused by this current

  A current carrying loop of wire lies flat on a table top. When viewey m jvwo 2m 7myjkkmze*6u fm. ,:/mu04qrp4s0d from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic.w420oyjk60m/s umrpymum *vfm qk , zmj:74e field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When viewjswz 8-28kp3w,w h mqwed from above, the current moves around the loop in a counterclockwisezwqm,kw 3h j-wsw 8p28 sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic ,ta4ug y itev.+ a1wg)field is the

  1 T is equivalent to9zj r8n4 wlf *bo)vjn3

  The direction of the force onue+5v anhyn(i72uw +v a current-carrying wire in a magnetic field is described by which of the followin5 ivv ha(7nu++nye u2wg?

  The force on a current-carrying wire in a magl*-mrtv) yihj )y0wm-netic field is the strongest when

  The force on a current-carrspo mi.7raihfx u)( +4ying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magn jj x20wjzi00wetic field vector points due north. What is the direction of the resu0w j0x2zjij0wlting force on this current?

  A charged particle moves and tn6ggx+em9a ,-0tqltdsyw36experiences no magnetic force. From this we can conclustglx, y wa6 06t -dm9geq+3ntde that

  A charged particle moves with a constant speww8 qtcva:sdgjd943. ed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on tjc 3dswtaq8g d. 9:4vwhis particle will be maximum when the particle moves

  A charged particle move(myi 6p6emxar 1rl)6es across a constant magnetic field. The magnetic force on this partic)xye ilmr 1(6eam6p6r le

  A charged particle is injected into a uniform magnetic field such thatp9)qrbg a4)lo its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight,g )ploq9b4) ra the particle will

  A charged particle is ob-j1 4k fy*votdserved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the ratd o* jvy-4k1fdius of the circular path would be

  A particle carrying a charge of +e d tf6+8ms-n fatravels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the ra-6f8tdns af+ mdius of the circular path would have been

  At a particular instant, an electron moves eastward at spee.dl9t:yzn /dktdu fxlg 4t7 n(g5/a6 kd V in a uniform magnetic fie5g.ak:6 97ldl4x d/t nn(z kt/yufdtgld 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 curve cl4 odi n/7vrcmtp91 1upward as the result of a magnetic field. The direction ocmt l4 /n9pd7 cvi1ro1f the magnetic field is

  An electron moving along the +x axis enters a regionr 5,cdhrfjw pn/:z 7;g,zhe :u where there is a uniform magne, h zf/ erzj7grcu:wpn:5,dh;tic 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 produced by a long straight curry b b2zkna l5 st5qiz.-/o++cccp9h-rent-carrying wire is

  At double the distance from a long:o8,eq- sjyw+k 8poh 9ugid5c current-carrying wire, the strength of the mag gs9c 8p+,qie-:oo5yju8w khdnetic field produced by that wire decreases to

  Two long parallel wires place.34: ztm lt5j.euu lwcd side-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 midwayl4ew 3 :l5j.tutcmzu . between the two wires

  Two long parallel wires placed side-by-s l v4nqzj7(+lfide on a horizontal table carry identical c4v(ln+7 qzjf lurrent 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 igkp9)/semyfe/ j5k-s bn 2 3w f8mr9bforce between 2 rm-k5eb/9kfjn) gfs983/eb pisyw mthe wires is F. 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 b57p6 qh sx3k+to epb:toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on the pro3pbo:sethp k5 6+7bxqton?

  A wire lying in the plane of the page carries a current towarx:0a h;ar wng/+ou bl8d the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularlywb80ral n: x+ /ohgu;a toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are place o(me cc-kxj+6wa7ar9d side-by-side on a horizontal table. If the wires carry current in the sa xwo+-6ae9akr(jc m7cme direction,

  Two long parallel wires are plac:pgl.bzkwnm)e 3o j(3ed side-by-side on a horizontal table. If the wires carry current in opposit.3nz wge:mjo3()pk lbe directions,

  Consider two current-carrying circular loops. Both are mag 3e5rlmav x78de from one strand of wire and both carry the same cugea 58vxr ml73rrent, 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 the larger loop is

  Consider two current-carrying circular loops. 6ijl 6bvtm1f/ Both are made from one strand of wire and both carry the same current, but one has twice the radius of tm6jltv/ fi 16bhe other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying4g3+igi ck)b6pe5jnm loop occurs when the angle between the loop's magneticn igp5ck+ em 3bijg)46 moment and the magnetic field vector is

  When placed askew in a magnetiy:7idzy/w waq +*na 2nc field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic momqn27w : ayd+a w*/yinzent vector

  What fundamental fact underlie s/ 89ap jnknmqd2g53os the operation of essentially all electric motors?p 5q/sa2k jmd93g8no n

  A circular wire loop lies in a horizontal plane on a table and can9f+ y:ar*cbx9rwrw b4 ) yy*jrries current in a counterclockwise direction when aj 9w:y 9f rnb**c rb4wrxy)+yviewed 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 field?

  In a mass spectrometer a particle of masy d 2/ssierk5o2lk80vs 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 fie 28/krkvs5ld0ie2os yld 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 conr8jo2a k36es:l/o2qa9a x oj rsists 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 th 2 okarrx98oj:2jsaqle6a / o3e magnitudes 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 okh+l0b/ meva7m j(w a hp+.a:kriented parallel to a uniform magnetic 0mpaaahhevk :m7wkl./ (++bjfield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction ofyt*v9q *5q0uw i - vzfgwxh wk0d1x,m0 $30^{\circ}$ 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 placed ;6t jc )ti*axkin a magnetic field of 0.020 ai 6x ;)*tckjtT? 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 o2 m17d8mc/hhmc f+w h7k gce;of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in th h8m ;e2/h h mm+g1of77wckdcce 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 T. What is the magnv(x1di xmu wmhu33kuv77-0m,e r2nxwitude of the magnetic force on the pr7 37m2 u0 x3mh xxd1wwueun-k,vr m(ivoton?

  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 ek5/ut aj1 0pma 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 (4latb*uq7h.vq/y3pk c6a/ kv n s8avspeed 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 ds81zy;r7kfxup w,jt z8.,atyue 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 speey:q0.y6g yq6jt z mgb0fvcmz76 y j/7 w8tyi8hd 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 sp w -llzu)tri34eed 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 o 1h )y:ozq6v4nun 16k zj;xvzef $3.0 \times 10^6 \; m/s$ 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 magnt p+gr8:,k/ h1zivwpnitude of the magnetic field at a distance of 0.15 m from the w/1vt+,prnig k pzh: w8ire?

  A high power line carrying 1000 A generates what magnetic field hq-8)9dekj s4z.cwiy a*qqd tn , 3pw.at the ground, 10 m a-a kq wcnp8qtjqy *sz4,) .w hid9.ed3way?

  How much current must flow for6q vhl(m3ny n f9mnt:x*/fc .g $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carryi1 m3sje yt:ub/ng a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of tbymt/je3us1: he Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wirtjb i7y*h4:*x47a5ujm xquuees carry currents of 10 A in opposite directions. They are *x4u 54h mx 7bea :yu7qjiutj*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 from the other?

  Two long parallel wires2,iytu:gk,kvh )vt 75 oqi7aksz* ek. carry currents of 20 A and 5.0 A in opposite directions. The w,,hyu2 tkzikvv)ak*e:qi75 t7.kgosires are separated 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 direction1axj2 z6f7x eqv:yx53:k:v oyvypw5rs. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the t qjwe75vav :k3 :zov5xxry2 yy:xpf61wo wires the same?

  Four long parallel wires each -,81fybouzgf carry 2.0 A in the same direction. They are parallel to the zf bug,8oyf1- 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 to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opzqjo :8f rf0b6:o p(oaposite direction. The wires are separated by 0 o bf8o pj(q:6rza:of0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the c(h a1bf8f9 v,)trbid7 twicm:enter of a circular loop of wire of radius 4.0 cmi(ia1h)fbd: 87wcr t ,bvfm t9 when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What )su hvbkl1((b) i:bsq;t ruj6magnetic field is produced at the center oul)()(t :qsvis u6jr;kbbh1bf the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a curr7wvs bzey w9b7/ms3 l(ent of 4.0 A. What strength of magnetic field will /ml9bw3byz (7 ve ssw7it have at its center?

  How much current must pass through a 400 turn coi0ae5l- ugli+3.;zsdp+adl hj l 4.0 cm long to generate a 1.0-T magnetic field at the cd.3+ ; 0aul- iajpsld+lzhe5 genter?

  How many turns should a 10-cm long solenoid havaqo1h),xb*hxyl 6h *se if it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetichsa 4xx77r i )0f4stug moment of a rectangular loop of 120 turns that carries 6.0 Afhxa 74i0sru)4 xs 7gt if its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of r t+ 37+jmdmo:ooj v9vsadius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whm+7vo39 mvd so:oj+ jtat is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cd /2u7zgw4 ti23ech .9bevmhv ross-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 0dis1 776 hwlb oxiw2e2.0 A is in a magnetic field of 3.5 T. The loop has an area of27exb d7ih ow1is6 l0w $0.12 \; m^{2}$ 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 uhkdyl 7;0x/lw niform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetily ;d/0 h7wkxlc torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 b wunw j)-5)h) uafy k3vy6a:im is in a uniform magnetic field of 0.30 T. The curwu)-n5 : vhaa3bi6yufjk y))w rent 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 ;no2-swgrkc00c e;zw5- +zx7obuyzy 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-charged particle (chw,6 a eou9ptm1arge 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 velf ,7as.s). en:8 k)lafndi ktxocity $6.9 \times 10^6 \; m/s$ 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 magnetrh t*7n e wt:6kvr)cu8ic field of 0.040 T. Whatcwr)6t tk vrn*8eu7 :h is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a k0b8ih+ggw 0j magnetic field of 0.30 T o8g+j kw 0gh0ibriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is a6d xs2sy mxc*g.jq)xmo 6 nu:/ccelerated 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 the E-field is required if the partidc usnqm/m2 g6yxx*6.x:js ) ocles are to be undeflected?