If the north poles of two bar magnets are brought close to ex m,o :v3itgoe0r9c/ef tn1/cach other, the magnets wcv:mo30in1r/ , g9tot ee/xfcill

  If the south pole of one bar magnet is- nl9ycx:-2lgyxvmy0 brought near the north pole of a second bar mal9y: vnc xlgym0x2- -ygnet, the two magnets will

  If a bar magnet is divided into two equal p /b,hn3snjky:) 0./f blnbk qyieces,

  The Earth's geographic No; ,aw3s 7f+(ki bwogzzrth Pole is magnetically a

  The south pole of a magnet p e7bwg zh)t/4zmh74-: fndx ndoints toward the Earth's

  An electric current prr2o;kts)2r5 10p1awtsxtt qf;sdar 7 oduces

  Which of the following is correct?;w1nv o/iy 6t,pll 45(dqthug

  A vertical wire carr7i b+ 5to n)/sh vhywj-eyg2(vi/b uu4ies a current straight down. To the east of this wire, the magnetic fi7w+2bug-(vhs ontb/ 4j5vyy/)u ie h ield points

  A horizontal wire carries a current6v(u3( mtah7fc *i rqd straight toward you. From your point of view, the magnetic field caused by this currf dam(3vc* i6t(7qurh ent

  A current carrying loop of wire lies flat on a table top. vrpx48fn:ck z *k1r*d When viewed from above, the current mo fkr4dcv 1xz*:8rkp*nves 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 of w de 0.z42zjdswire lies flat on a table top. When viewed from ab2.d dj04ezsz wove, the current moves 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 field is th: +ds;gv:na nfe

  1 T is equivalent tot.a. zk)bam2(e.sh sl z;f,hz

  The direction of the force on a current-carrying wire in a magnetic field is des .-2lz* bjpgsecribed l e 2s*bzp.j-gby which of the following?

  The force on a current-carrying w*r2a7wek cre1tv m.1 qire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero w56l p htt8ezw:hen

  A vertical wire carries a current straight up in a reghks5c b u gutg,6cz2.*w4 6zwcvy78vkion where the magnetic field vector points due north. What is the direction5vkb 8wc6wuu* z27 g4.scct ,k6ghvz y of the resulting force on this current?

  A charged particle moves and experiencsx w* 6lu(c/xzct2mu *es no magnetic force. From this we can conclude t*wu2*x/ s zlmc txu6c(hat

  A charged particle moves with a ep/. f2,8i;k /(kxxkjfrdpauconstant speed through a region where a uniform magnetic field is f /x8/(k, ; pifuar.kx2ejkpd present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a c8ydkbl,cs: prj,j.(sasdr8 8- +xb dqonstant magnetic field. The magnetic force on this partd8srpa8xjck yd-.,s r+ 8jbl(bdq :,s icle

  A charged particle is injected into a unifoo(b)lxr9h ku:xx b*k) .h2kby rm magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weightyu)h (x9 lbk2.b: * b)ohkrxxk, the particle will

  A charged particle is observed traveling in a circulaosxkf+6m i6r t)x:h,ar path in a uniform magnetic field. If the particle had been traveling twice as fast, the)a x,xi sm6 okrhf6+t: radius of the circular path would be

  A particle carrying a c3de 4dy+gbk;x harge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of de3d4xkg ;yb+ the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniformw/erw90zs5zc magnetic field that w 59zw0e/srzcis directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to cur1m* (fcyht+ luve upward as the result of a magnetic field. The dir+t1*um (h lcfyection of the magnetic field is

  An electron moving along the +x axis enters a region where thk36 nlu4 1hvp4q;(t3tmivo8 qv g q8utere is a uniform magnetic field in the +y direction. What is the direction of the magnetic nq8i3t h k418v ut6u4qtvmlv ;(3pgqoforce on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straipxktl )ft.1;iu14f efght current-carrying wire is

  At double the distance from a long current-carryingo ;anp9db 5n:i wire, the strength of the magnetic fie:on ;db n59apild produced by that wire decreases to

  Two long parallel wires placed side-by-sidzb. 9yssnix(w-r aj:;x 4vqp+vw: v5 ae 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 vaizx .9(vav :w: ws+-nxr45yjpvb qs;iew, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carry identi(n98t:1mngmr d jk5 b+ as/quycal current stmn5 rt8qj1y /ba9: k+umng d(sraight 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 b8x)z4tsinu35jxa . zeetween the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two 5 3)zejsa 8xu itxn.4zwires?

  A long straight wire carries current toward the east. A prha.tdm7m:f gsh 1k /h3oton moves toward the east alongside and just south of the wire. What is the direction of the force omk/1h.asgf hd 7:mt 3hn the proton?

  A wire lying in the plane of the page carries a current t7 8engnsw9s5 nem 9jacwbi55(oward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, aljs7san5bwg 9 i55ne9ecmw8 n( so in the plane of the page, from your right?

  Two long parallel wires are placed side-by-s6/uz.ce bdl. pide on a horizontal table. If the wires c .c/e 6.lpzbudarry current in the same direction,

  Two long parallel wires are placed side+ii-zq 4m5a vv-by-side on a horizontal table. If the wir+q5miia-z v4v es carry current in opposite directions,

  Consider two current-fh h,(j v0 l95t3n0frzaz1li ycarrying 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.5z(9ljzfi r ln fhv10t3,ahy 0 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. Both are mad:dpzeb j4uai7e- r+z 6e 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 loiep7z+a-z:u b4r de6jop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angl/xc3w kv9zas)o6/q, sj aj*us e between the loop's magnetic moment and the magnetic field vectorwv 96cs jx/aasj* /zk3su) q,o is

  When placed askew in a magnetic field, a current carrying loop that ist oep*df.to;fh)2l) d free to rotate in e ot)td* ;2pof.ldf)h any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially+lbnx (qk+.q/s5x7g;sg.c lwcpv gm+ all electric motors?wq+mx;+g(b p5 ls+v gsqx.k/c gln7.c

  A circular wire loop lies in a horizonte(s; sgak jf5,8 +znqval plane on a table and carries current in a counterclockwise direction when viewed fr5a+(8f vknejgq s, zs;om 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 part8gxbhk/4yr 5 hicle of mass 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 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, / ghhr ybx854kV, and R.

  A velocity selector consists of a charged par 0-eu1d-okd bxa .u(qn dha,xtxt/+c8ticle passing through crossed electric and magnetic fields. oxa,b/0-d tku.q 1 tx ade(x+n cd8uh-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 direction should the electric field point?

  A 2.0-m wire carrying a current of 0.cmm6zt10agj*. 0qwn df4g5 qy xrfu 3l8f;;m x60 A is oriented parallel to a uniform magnetic field o;f;xfz* l4dg1m8 fc mx0waq0nqyt 5 jru6m.3g f
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction ofn; h iu/p:z7wa $30^{\circ}$ 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 q 2g+yr:ea n5ni1f;glis placed in a magnetic field of 0.020 T? The g1qa:+;2rgnn ilfe5ywire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long eop b x):+k3ycr)su*na(h ylv*4zi0f has a mass of 0.050 kg and is in a magnetic field o *vf )rx yp nczs)iekl:*y0+(o4b u3haf 0.10 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 uniform magnetic field of 0.20 T. What is the :dp8mg bggxb7y+v *i; magnitude of the magnetic force yd mvbg *ggp+b;7i: x8on 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 +8dg,o0 4km626s yb4)rithehuiprfm 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 h s(l7n x)lva7e.lakzyybz4d0je-3 7 $5.0 \times 10^7 \; m/s$ 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 c0g yw8vy 0uj sas3 ys6;uwk2)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 speedj7kwaz 9tt2ukg)*a e4 +pa9gh 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 r+oic1yxv;q( 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 a)pgxhmeehxj/1 );wc z) k8 j,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 ofaqqfmqc0 e94,i5 )wtx 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the,q)fa5t09w cimeq4qx wire?

  A high power line carrying 1000 Al d*8w2jqbfut;;.k8ylx sy7j generates what magnetic field at the ground, 10 m a2j*q; 7u wjldt8;sk.yy8xf lbway?

  How much current must flo7s6*e1h k c) oq/rfxk nutd.u7w 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 caof:n:+(k*c4x jq cii qrrying a current of 5.0 A is the magnitude of the : qn 4ic xjf(qi*c+ko:magnetic 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 10 A in opposite directirda1 yrsyndd )9 /r;1icl/n. niwf.- uons. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one wired.nd/)wr 1il9 sifuyndan/ r;y1r -.c and 60 cm from the other?

  Two long parallel wires cbo.l(,c3 ftp qarry currents of 20 A and 5.0 A in opposite directions. The wires are tq .,op(cl3 fbseparated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currenw*mcsc7hsq gi-o3h gi eh51,:ts of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 swmei:shcc3hhqo,5i*7g -1g 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 i5dm7noag h uj+:+ h*zkn the same direction. They are parallel to the z-axis, and they pass through the corners of 5khhjnm+: *7ud+ zga oa 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 ga*7ewmuo- 2x 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the e*gw- 2a7mx uomagnetic force per unit length between the two wires.

  What is the magnetic field at p ax 86zkngs92the center of a circular loop of wire of radius 4.0 cm when a current of 2.0n9skpg6 azx82 A flows in the wire?

  A solenoid 20 cm long ista5f;o zo,.8yo sr9tu wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 1089uo,ofztr ty5; s o.a A flows?

  A solenoid with 500 turns is 0.10o k6ycjdgpl/05/l9qw m long and carries a current of 4.0 A. What strength of magnetic field will it have at its cep/cd g/j q6ky05l9 owlnter?

  How much current must pass through a 400 turn coil 4.0 cmw yvwmo7*sg :fn5( z-x long to generate a 1.0-T magnetic field at the centerz:wf-xomvw5 *7g(y ns?

  How many turns shoulmq;0f95g gyv4bar yj )d a 10-cm long solenoid have if 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 t p,k8:p4-jnhb dru6f burns that carries 6.0 A ifhrn,d4p- b6j 8kb pf:u its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of r a h+akxi e670a2uev-iadius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop iaeka0h 2evu-ax 7i6 +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 crp cuq 7vs7.vy0oss-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 of r qox3ddl8oe z.v9t+. 3.5 T. The loop has an arqxdv8 d93+t z..or leoea 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 fiel y(2tvl8:xio md of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when tl yv2oti8(: xmhe plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radiuy/qb dg5.l f4xs 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 para5d bx.4 qfly/gllel to the magnetic field?

  A circular wire loop of a+musli z;5*h h j:8kwwrea $0.25 \; m^{2}$ 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 single4lq8w4en+uy213c 2 q fljbnqw -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 witdb c0c70v,h 29s vuezxh 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 ma8 wvxth7ye1u +7yiukg.;3exp gnetic field of 0.040 T. What is the radius of the proton's resulting orbi ek.7x7iu1gep3+; uyvhxtwy 8t?

  A proton is accelerated from ra.1 u3kccd pv0est through 500 V. It enters a magnetic field of 0.30 T oriented perpendu0p.k1cd3v ca icular 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 kV u;kp5kz 12 qp5;qk wtybefore 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 undp qykk qztk5;w5p;1u 2eflected?