If the north poles of two bar magnets are brought c:uow*u1l+9w .)hnp1ts sgmr blose to each other, the magnets will1wp m*1.nsulb)+ g:9u w horst

  If the south pole of one bar magnet is brought near the north pole of a seconw5 e5 zw8, y43ninr 0f4huoldpd bar mag5 405i34ewylohnu8 w ,p rzdnfnet, the two magnets will

  If a bar magnet is divided into two eq,ky. hc gj d).zb0gf2.eh-(8sbze srhual pieces,

  The Earth's geographi . k+ 17kp(r3yftbzdfjc North Pole is magnetically a

  The south pole of a magnet poinp:4yi s y 0e9sxnf1u9rhn4*ipts toward the Earth's

  An electric current pc ujjqcyl099(t8ge )s roduces

  Which of the following is correvk( .qsp9 k-wvct?

  A vertical wire carries a current straight down.q, :h9bk7,pv k fw+pjg To the east of this wire, the magnetic fiewvfh:+k9p g,jqp, 7kbld points

  A horizontal wire carries a current straight toward you. apokg0,o 7 wb/taw-a4 From your point of view, the magnetic field caused by this cup k7 aog,w4w0 -b/taaorrent

  A current carrying loop of wire lies flat8*jw uvwri k/, on a table top. When viewed from above, the current moves around the loop in a counterck8ww, j/rv*iu lockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a t8*mxy j.2.opvtx6nuo able top. When viewed from above, the current mptv.oyxxu 8 *o nj2m.6oves around 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 fietn83ux0 73j )tfzzaqo ld is the

  1 T is equivalent to3w+yp- ; t8t 6r, pbsmny5sfkb

  The direction of the force on a current-carrying wire in a magnetic fieldwn5 mkusup1uzlv,4 *: is described by which of the followuuzv4pn 5l,s1 :km*u wing?

  The force on a current-carrying wire in a magnetic field is the strongest wg;j9 wzu kvjs+ m//xm3hen

  The force on a current-carrying wire in a magnetic field is equal t( qpd;-jqgh:)jn 3rx eo zero when

  A vertical wire carries a current straight upujo 9y:*y,ddf in a region where the magnetic field vecto:oyd, dfy *j9ur points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we can co 44(recxq4 c (wyoh/e9ybj qc:ncl eco:4 (y4r9b(qx/ e4ycwj hcqude that

  A charged particle moves with a constant speed through a region where a unifor-ggb)wbk6f oy/;w8wt m magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum whek)8g bt ;-6gy wfb/wwon the particle moves

  A charged particle moves across a constant magnetic field. Tq)ot 3kgr*-j t/bd4ythe magnetic force ontgkd/*b j oty) t4q-3r this particle

  A charged particle is injo* bdu-blm+uk 5pq -n;ected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the pa bum-o;+ udk*5 ln-qbprticle's weight, the particle will

  A charged particle is observed travel9cfoy7ytbkms(i90kl4rin 7i 3c7x n ( ing in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would 47 9 trf(7ykn 3l cc0i7on m9i(bixskybe

  A particle carrying a charge of +e travels in a circular path in a uniform magnj /(cvvx0)ik8up9mpaj ji:3o etic field. 8 j:mvo ppic(9uivx j/30ja)k If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speedfqg+70aiof (ywxr0t - V in a uniform magnetic field that is directed stwr fgt+-0xfayo70q( iraight downward. The magnetic force that acts on it is

  An electron has an initial veloci*y0lbty 3w;gjty to the south but is observed to curve upward as the result of a magnetic fiel; yltj3 0wbyg*d. The direction of the magnetic field is

  An electron moving along the +x axis enters q5hgj*tl;y*utxf;kalymoz0 812 c: y a region where there is a uniform magnetic field in the +y direction. What is the direction of t*5 08gltmay;jqlx f :21yyhz k;o*tuche 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-carryingkthn g.e;1d3w wire is

  At double the distance from a long cpnaq;;u)yv1 b1g8zqm /oo z3burrent-carrying wire, the strength of the magnetic field prvag;o u )q ;131y bnpzb8omqz/oduced by that wire decreases to

  Two long parallel wires placed side-by-side on a horo8jjfv/ mwj+-w1d e5 yizontal 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 between thmw5f jydj-o 1w/j8v e+e two wires

  Two long parallel wires plag kl9 a w10e*,du36ghkfkqsm gfp.x,- ced side-by-side on a horizontal table carry identical current strai*kg0,s f9 ,3-6 k1gxgpe.dlkmfhqua w ght 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 betwee2443jj dq 7w(8virtm ws,uehnn the wires is F. The curj4 m8w(3j4,d2en vtrqsiuwh7 rent in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A protw(/b ppw mg32k up5kr ,4bx*u f:msck/on moves toward the east alongside and just south of the wire. What is the direction of thegbxk5 4mup(rwcu *2wk3/pmbf:/s, kp force on the proton?

  A wire lying in the plane of thjc2wle xug95k74bzob 98djy, e page carries a current toward the bottom of the page. What is the directi 7jox4b 28 9c5dlugbekz jy,w9on of the 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 sidei;4r 5k8ui. v ,lpznhy-by-side on a horizontal table. If the wires carry current in the same di vypn.i5 ,uk8zlhr; 4irection,

  Two long parallel wires are placed side-by-side on a horizontal table. Ifpekyb *2114cy+k7j ewo6oz k o the wires carry current in opposite direocjw 164 z+k ypo7o2ebe ykk1*ctions,

  Consider two current-carrying criv:/22 bpgq2x: gjqhh50 mf eircular loops. Both are made from one strand of wire and both carry the : v2 he:fh0 qbxr2 gmi2gqj/p5same current, 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 cjaddx6x:f b 9w82aw-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 moment of the wbj2 :aawf68 -d9cxxdsmaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the anglks(mg-ow hg+6ssv, d:h*n wbhj*p7z8 e between the loop's magnetic moment and the magnetic field vecjhs7d- ghg v*wo*hs ,8:+ 6 kwpnbz(mstor is

  When placed askew in a magnetic field, a current carr6 mua /.m.7 b(hagjsdgying loop that is free to rotate in any direction will experience a torque until its magnetic /.gs7. hjgmm6ba(dau moment vector

  What fundamental fact underlies the sxa( *7l)r n c8szt3o:8jwcih operation of essentially all electric motorsz(8srx w8jhcin :o *3asct)7 l?

  A circular wire loop lies in a horizontal plane on a table andg4*1vo(r7 7x7nrof(d2gq hy )rk) kq gcodho 7 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. Whvg7d xo o)q7y* 4o 7kd k)g1 hrchr7(qr(2fognich 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 mass m and charge q is accelerated t3vxt38-a;7 peivqoa r hrough 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 express7-eqi3 8tvvora p;x3aion for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consis ,lj-z.vmx.m 2xz, slbts 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 is directed to the north. What directioz2xb .j-m,,mlxsvzl .n should the electric field point?

  A 2.0-m wire carrying a current oopprlui9/bn 7o + 8060omixyzf 0.60 A is oriented parallel to a uniform magnezp6b0 o unro0+p7iyiol 89m/xtic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of w+/ierm 7pniq4ps4hp4(i;g a $30^{\circ}$ 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 p lm2s i22g h2*n-pl 0zoqolqk1laced in a magnetic field of 0.020 T?qz1k *0m 2hp2oil-lslg2 2oqn 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 of 0.050 kg and is in a magnet qh ni52+ spgste64:.5s npyakic field of 0.10 T.hsnsinep5 4:p26qg+ y.st5k a 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 uniform magnetic w ;;tot 0g;qqz*on8mzg9 naq7field of 0.20 T. What is the magnitude of the ma;g ngw;9oa m7 q;ot*qtq0 8nzzgnetic 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 speedq1dwqlo( h-x0c lp wvw 39j6q9 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 ofr4tng3yvxrkkl.. z3 6 $5.0 \times 10^7 \; m/s$ 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 spe vu ,scag2njgl28+ he0ed $4.0 \times 10^5 \; m/s$ 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 cztcbe5x0*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 magnetic force of the electron.

  An electron moves wiho i7z6w2b oqt,oppmx 81 g/2pxd+x)p th 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 speede5fndbi- ,eb15ht:p 8wg g9eh 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 oc g. m ya5).zxjecro59f 25 A. What is the magnitude of the magnetic field at a distance of ccaemr5.o.)5 9yz gx j0.15 m from the wire?

  A high power line carrying 1000 A generates what magnf zo76g7bef v,etic field at the ground, 10 m f vb7e,go7zf 6away?

  How much current must flow y2) 8;yio dfa4a/ft jlfor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carryin hxq3yg1dhtze,2w :h: g a current of 5.0 A is the magnitude of the magneti,wq3 hdh:2 e:z gxyth1c field 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 currents of 10xlr3x t*/zsrnb2(m5h A in opposite directions. They are separated by 40 cm. What 2ml/ztxn3 xhr 5r *sb(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 A and 5.oxr +wgz m lc w 8nlx.wzsy9o* ;5s3cq25w*)ov0 A in opposite directions. The wires are separated by 0.20 m. What i )9wol 2gq+z lx5 rozw;wm yc**.5s8o3snwxcv s the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposi (yt,lx78s3 myrs+lc mte directions. mrlmty(s x,+78 ylcs3The wires are separated 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 carry 2.0 A in the same direction.m;74o+ya rm2ro botd* 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 y7rmo d*t+ b;o2ao4rmone of the wires experience due to the other wires?

  Two long parallel wires carry curreng;m9hjy pihs 3t5 (niw1kieuig*1;p0 ts of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Fspit*1g 5;0yw9 kehgi; i(3i1j hu nmpind the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop *heb( 7uwih y:of wire of radius 4.0 cm when a uh(y:7hbi w*e current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turdw6dw/nor/ecj86skf u : 0el1ns of wire. What magnetic field is produced at the center of the solenoid when a c ju0o1/e66n/lc re8:dwdskw furrent of 10 A flows?

  A solenoid with 500 turns is 0.10)s1ouxrla.u((jz lo; m long and carries a current of 4.0 A. What strength of magnetic field will it have at its c; rs(ula)o xjuz(.l1oenter?

  How much current must pass through a .3 -y/lvq vswb400 turn coil 4.0 cm long to generate a 1.0-.q v/v3bw sly-T magnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to g abm.toa0:qjta tl;2hu c-44oenerate 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 turnsyfm k 6m0zd2.s that carries 6.0 A if its dime s2d0. 6kfyzmmnsions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic h8 gd7 ..tukrahwzz w20l26sdfield of 0.30 T. Th.d0l2ras .27 h wztz uw68ghdke current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-secti)m0.cjjw w(ecx9t(c ii.ero 3 onal 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 fieldz 6yo1 ,0ruw2iz.0gfmbaj9lzo2 *bxv of 3.5 T. The bv9022 jb xal.gwm*oo1fy 0 i6rz,zzuloop 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 radius 0.50 m is in a uniform ma 4: v/2 ctp qoqkjnhjn4nm0,/cgnetic 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 parallet4 : n2jn 0/c kncqqph/j4v,mol to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a d3;w*w8oktc 2 r0um.kr ij 9xzuniform magnetic field of 0.30 T. Thezj9;d wc8 w.kxkmti30*uo2rr current 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 area) 1crcjr ab: dpxf:fl.:; xtu;w7iln3 $0.25 \; m^{2}$ 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,oiu e cs--vp 0f-)fp*b a single-charged 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 vem-al94/wuu:4gdms f vm:op8t locity $6.9 \times 10^6 \; m/s$ 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 m)rmb1vq8ep;-pte8 anug 0 i9a potential of 1.0 kV and then moves into a magnetic field of 0.040 T.r-1eeu89 bpiqa 8) t0mpn;gmv What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 50*4rp frps8rvbz q-oy.+4miv)tq p+v 50 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of*rrv 8p4f.m-+5qs4+zr vtp )op vi bqy motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through ac +tg(h2pehz/5g u e,ehga:a . potential difference of 10 kV before entering a velocity selector. If tau/ e5,h:tege hahzg +2.g(cp he 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?