If the north poles of two (wh *mab;kbg 0rzy4.pb1z8mo bar magnets are brought close to each other, the magnetsa40z*p(bzh 8bw.k;o g1mm rby will

  If the south pole of one bar magnet is brought near the north polcl8ua g/ rz,1je of a second bar magnet, theu/cgj1 zl,8ra two magnets will

  If a bar magnet is divided into two equal pieces, ev 8ipet zr gx,b4gg.(w0)bl1

  The Earth's geographic North Pole is magnetically aod7pb45tei5k+oc 8x l

  The south pole of a magnet points towardq pe;ph:yz,z 9f sr,y4,/lrrv the Earth's

  An electric current p/cfn iafc6v d-.s 2 tzdtr+i6.roduces

  Which of the following is co(-v7u pyihc6k rrect?

  A vertical wire carries a current straight down. To the east of thizg 2t)v:kdu 3wb:gc. b;f.s dds wire, the dv b ..gws;k:d:tb3cu2) fgd zmagnetic field points

  A horizontal wire carries a current straight toward you. From your point of vwokkn78/0o qyiew, the magnetic field caused by this ony w k80koq7/current

  A current carrying loop of wire lies fla8zow 6mn7suh/hca(u/9erm7l t 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, outside thez / ho6m/77lwrmnu9ecsuh 8a ( loop? The magnetic field

  A current carrying circular loop o:i7 ptlv*7(a qa1m:c e.7i) ljqlwmt bf 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, inside pa1w tjt*l7imi7la v: mc)qqeb7:(.lthe loop? The magnetic field

  The SI unit of magnetic ffbx,w za+ph*5(p uaqlv5-cv 2ield is the

  1 T is equivalent tor.eah iur,5 ,nwma8w9

  The direction of the forcezs 4q ;w jm(xbpd8ivl9 9f3da: on a current-carrying wire in a magnetic field is described by which of pls(z9 4f;8xqb9m:iawdv 3dj the following?

  The force on a current-carrying wire in a *5ryq u4t jxsqib (36dmagnetic field is the strongest when

  The force on a current-d,*qn,w z0 ;nh 7kdub 4moso2qcarrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region wher;md5rt3q l2n,6h cib u4wrv:l e the magnetic field2d;vrlq:3trm4 bulwinh c65 , vector 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 wb+/goopaa87aph: okd:nm *0 ge can conc/ ohbn kgaa8o p7:modp0*ga+: lude that

  A charged particle mokyo 0-c pdsn 1spo 1n*-r3fby/givs5 ,ves with a constant speed through a region where a uniform magnetic fie pn/*po grsvfy- c0s 3bk1y-1nodis5 ,ld is 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 constant magnetic field. The magnetic force o8 isb(;9ayjy w;ada4 bn this pj4; ysai9b 8aw(;ybda article

  A charged particle is injected intoa58ernq6 x-ia8m waot t t1w-5 a uniform magnetic field such that its velocity vector is 15iqo w-a5xte8w-6ntmaa8 rt perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed tr c2kj )0 juq//l.dpnsoaveling 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 b2jlqupj) 0/ .o/ksncde

  A particle carrying a charge of +e travels in a circular path(qb.,2q n(ng kf tipldh(d *b6sqa:0b in a uniform magnetic field. If instead the particle carried s,fng .pb*:nd b 0qqb2i(a6(d tlhqk( a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniform magkst v-bym2vws +ays3:imq,(b 33e* yunetic field that is directed straight downward. The magnetic for -3*3wuby ymmq2y bst+,a3sv i(:k evsce that acts on it is

  An electron has an initial velocity to the south but is observ qtsf7zh9 4t.wed to curve upward as the result of a magnetic field. The dirfh t4zwst7.9 qection of the magnetic field is

  An electron moving along the +x axis enters a region where ther :frh1itim8k dyy9 u6y+to r()e is a uniform magnetic field in the +y diryr1i: rk8 omi 9ty()y+du6th fection. 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 c1mp5 c4zxgy* a long straight current-carrying wire is

  At double the distance from a long current-carrying wah 4yh ca-v ,,k.ub8ynjvmq-1ire, the strength of the magneti, -. 8ahy1v-yacm,ubhkvn j q4c field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table ca/kybw, j)cg0x rry 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 mid0x)gwcby ,k/j way between the two wires

  Two long parallel wires placed side-by-si(zbvb 96qr4s:k4oggt(gmu)s k o4xi,de on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactltx( ouo krg)qb:gmikv g, 4ss 6944zb(y between the two wires

  Two long parallel wires carry equal currents. The magnitude 3a mawo5q+6 +psitlm)c 1thx8v :q9vz of the force between the wires is F. The current in each wire is now doubszvq+5cv39m aaott8 :p )w qx+6ml 1hiled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward t f:20g dukx2shx :7r9awaa9uxhe east. A proton moves toward the east alongside and just south of the wire. What is the direction of the:rx7ugh 9:fx dw s2a9 x2ak0au force on the proton?

  A wire lying in the plane ofyblu 11atd51ucks;t 6 the page carries a current toward the bottom of the page. What is the direction of the 1a16d yctbluk;s t51 umagnetic 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- e,. .gq8)k dhp5j *mladvn;znby-side on a horizontal table. If the wires carry current in.vl gpd,; e h)jqnmn8ak dz5*. the same direction,

  Two long parallel wires are placed side-zrue3t , 7n 7ub7 kezz.n0m+wxby-side on a horizontal table. If the wires carry current in opposite directions,nk,ew0u7znz7mbexz u 7+.t 3r

  Consider two current-carrying circular loops. Both are made fj 06zk .uz8 khrhmg.-wrom one strand of wire and both carry the same current, but one has twice the radius of the other. Compark. rwzgkz-uh m68.h j0ed 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 s. zzwa.dbbh:qck+/x7 j4m rlj2.5s c. Both are made from one strand of wire and both carry the same current, but one hb2hr.kmzcsz l c4wb+d/7: ajx j .5q.sas 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 carryha;udjd .vw*w pq .1icn(/g/ wing loop occurs when the angle between the lauq;gi/dp.wh/wwv j .dc*1( noop's magnetic moment and the magnetic field vector is

  When placed askew in a magl+y7(z-r saprnetic field, a current carrying loop that is free to rotate 7(rp+ rl-zysain any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlivped :-:hot :o;kh2ixey ks--es the operation of essentially all electric motors?y;hk h2k ev--:xoeist p o:-:d

  A circular wire loop lies in a horizontal plane on a table and carries currefv/k5 udni:i7*x)vsit0zh d+ nt in a counterclockwise direction when viewed from abk5 ndivf7:d)s0 vtzui+i/h * xove. 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 mass m and charge q is acceleras9g m1s9kmr0ee( l0su 7xgwf* ted 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 magnet1gu7*m 0 elm9sw 0f9exgkrss (ic 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 of a charged particle passing through cros ) 6/ocs4hsddssed electric and magnetic fields. The forces exerted by these fields ared6h)/4 ossdcs 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 0.60 A is oriented parallel to a uniform magnqkkf5joje3 7-etic field 5e3-j jqfkko 7of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direclqufcl6 br, )m1 u0+q(yh(esrxx 93hation 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 straight69 ,8g(y+ta5;pjrn*o trxvfc lw 8lb x wire carrying 5.0 A when it is placed in a; w*n6c(rxbtt xo8ra9ypg 5fl8j+ ,vl magnetic field of 0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m lonfgrqp 89l9 8mcg has a mass of 0.050 kg and is in a magnetic field oprq89g l9cf8mf 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 magkmlxq/17) bi onetic field of 0.20 T. What is the magnitude of the magnetic fo/kb17m il)x qorce 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 wig/8s ,( r.fvgm ) 156nwrvvadhi5ulgmth a 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 zr5mlulu -jf8(c;ljv e1 6b*y a speed 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 travelin tqb(7hi7pjr (oo)5 zzg due 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 speed ofit:;0cv 6 l+ihn wey2b $8.0 \times 10^6 \; m/s$ 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 wi0 :oonh0 nbjgsaiv 0x/hp:)y5ee8f8n 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 speed o;b0xdl apa63o f $3.0 \times 10^6 \; m/s$ 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 6-bldepy( rm)of 25 A. What is the magnitude of the magnetic field at a distance opb y)dl mr-6e(f 0.15 m from the wire?

  A high power line carryingm,e-otieqo*v m+5dx6 1000 A generates what magnetic field at the ground, 106-oex +m5 , omvqdi*te m away?

  How much current must76 48 dnrg(pq 0nyqdjy+ s9u(yjru,vw flow 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 carrying a current of 5.0 A is the ma8y0izk)wx n/w gnitude of the magnetic field due to the wire equal to the strength of the Earth 0wxk/iyn) 8zw's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carryje5w 5n wcm3e4fruy8 / currents of 10 A in opposite directions. They are separated by 40 cm. 8f5ye4m5w /njwr3uc e 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 wiresvy/)b048 iek rdiuqy2 carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the two wired ir)i/ybq4 uv2yk08 es?

  Two long parallel wires carry currents of:)h1qau.w*h v;qryxybrv1 /m 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from thhq:. )am1uqvyw 1vr; y/xr*hbe two wires the same?

  Four long parallel wires m8h d*rzv*m1b*:c l,j(udjnx each carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the co :znx v,*mubr* h8m*1cj(jlddrners 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 t;ta bedt/e04j6uv4r p he opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wireavp; /te60 ed4j4r buts.

  What is the magnetic field at the cent -k yc f*vstx9,ai/vn+6ujv6ter of a circular loop of wire of radius 4.0 cm when a current of 2.0 it k x/n+, v-a *tj669sfuyvcvA flows in the wire?

  A solenoid 20 cm long is wound with 50007 z/+t-cww ) d x2e+ed-3l,jcqkodhin turns of wire. What magnetic field is produced at the center ofxjc+c+3e2 dqid zt o7/,w-wdh en)-lk the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a currentipkcxlw,j. 94:l0huq 0 0v wty of 4.0 A. What strength of magne:l.cw 009v ,xy pwtjlh0iuq4ktic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generat xzly2 j-q0sx,e a 1.0-T magnetic 2x syql,zj0 -xfield at the center?

  How many turns should a 10-cm long solenoid have if it is sz )4m64z hfn kwhm3j:to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangulauzf,r dxvg 7u(r;3q,c r loop of 120 turns that carries 6.0 A if itvu(fug,d; 73rxrzq, c s dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wt5p k z+bxp.y-ire of radius 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 t 5-xpzyp.tk+b orque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectxl* -r4f, nj)6rzhfaeional 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 3xsg;q3qht 4;pre 7 q;i.5 T. The loti34;;rq7 qges; qhpx op 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 unifor. 0a-ce-pw30 xefgmdd m 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 pardfx3cm.d0-w-a pe e0gallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.3xy-0+k-e e 73ga qn-i*frouva0 T. e -ya- -k+f *vr7oixa nu3e0qg The 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 me y/z3 d8wz3zof 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 pa *nw8f,iy., k e umsu6jugc*s;rticle (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 w nca6+sae(9n uith 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 o, uxi k*7d1n-kz1h5oo 4yylzhf 1.0 kV and then moves into a magnetic field of 0.0405nxyhhl odkz,ok- 1z*41u 7iy T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fieqh/ao8fkn60i 0e 9 todld of 0.30 T oriented perpendic 89tdq00/oi kf aeonh6ular 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 kb2l)1j cep v)19,u2ncsdajvwaac9(hV 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 t(9j2l,1c2hnp aw 9 adac )ujbe1 cvv)so be undeflected?