If the north poles of two bar magnets are brought close to each other, 0cc du6es pur(e; 5xf:c,wj.ythe magnetsu.wrej (fcex5y,c 0:scd up;6 will

  If the south pole of one bar magnetsp 5fofm ,nk1e 1gk*-a5zxd :0hkkpp . is brought near the north pole of a second bar mk-phkx1*gze m,5pnsk:p0k . fado15fagnet, the two magnets will

  If a bar magnet is divided into two equal pieconzxty2,tan 02)vr c), nlqm )es,

  The Earth's geographic North vmllz m ttgo.4 p5*hl/1;/ kikPole is magnetically a

  The south pole of a r6b. miq;scx*magnet points toward the Earth's

  An electric current produ3jy)/neokk ; mces

  Which of the following fnk l/*y jw), rsstw(41q uy3zis correct?

  A vertical wire carries a current straight down. To the east of thisn5ty0;su5dl j58fp ae)dwm3 w wire, the magneti) ;dfn8a ud3l 0e5jw55tws mpyc field points

  A horizontal wire carries a current straight toward you. From yodii:* izi/ v6z;e 5pueur point of view, /* 6i5ie; ivezp:udiz the magnetic field caused by this current

  A current carrying loop of wire lies flat on a tav4nc a*.yq c,;8rbsnhq :ifg:ble 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 the*:qig f n, rs.cb8 qan4;h:vyc loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When cz23 fx tf2.l4e5ux.u0 nklaq viewed from above, the current moves around the loop in a counterclockwise sense. Wux 035ate l ql2z.2.k4cxufnfhat is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is thsvvg yuv9h4gdji0 163e

  1 T is equivalent to ov;oy 2tycq)ejtb43(

  The direction of the force on a current-carrying wir4 jum*8 dnow29f k1vbce in a magnetic field is describedwjvn 42c *fo19kumb8 d by which of the following?

  The force on a current-carrying wire in a magneguke p*bo 7j/l i65.q kzxkg2/tic field is the strongest when

  The force on a currentp- hdab +qh0i s:a 6jv:vx*h9o-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the a5r5 akwl0 pzwm.2tl/ magnetic field vector points due north. What is the direction of the reslt/w5ar2zw5 0ampk l. ulting force on this current?

  A charged particle moves and experiences no magnetic futfmr2-fy + 2*ib msu/orce. From this we can concu m2 *fmb/u yit-s2f+rlude that

  A charged particle moves withh zsbr fg(6u*+ ;cax/yo/ns+v a constant speed through a region where a uniform magnetic field is present. If the f/6rv/ +shu+yg*a zonbxc s;(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 magnempe n n1-(iggp9cx -3ctic field. The magnetic force oncn1m-pne g-xp c9i 3g( this particle

  A charged particle is injected into a unifo*(vb rqyi/,pcg. 3e9zu9 lv vcdf.(wtrm magnetic field such that its velocity vector is .c9 (rvy(fi9d ,utg v.clvqew */zp3b perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is n3cxh tt,zda+tz(a/5 r*7h cvobserved traveling in a circular path in a uniform magnetic field. If the particle had been trav5xzr7h*a3nahct zvc t,( td/+eling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular pxg*s,a(wb3y*kjx*i 6+wm bit zd4ix5ath in a uniform magnetic field. If instead the mij x +atixzw*g4 yb5s*xk( i3w6*bd, particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant,1t 4b tng.h,y(2got vm an electron moves eastward at speed V in a uniform magnetic field that is.bogy m24hnvt1 t(, gt directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curver 9b s(v)iay( (nyhy:n upward as the result of a magnetic field. The direrh(i( (:y9yby snn )vaction of the magnetic field is

  An electron moving along the jk43i.c s;nec4 yax5k. td*ux+x axis enters a region where there is a uniform magnetic 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 x*d.y3x 4;ikjk nsc 5.uc e4atpage.)

  The magnetic field produced bog +n7 nwzsh9*y a long straight current-carrying wire is

  At double the distance from a long curr9o5 zb,:gg(ei amdz 8vent-carrying wire, the strength of the magnetic field produced by that wire decodg9z i (8gmbv,e5z a:reases to

  Two long parallel wires placed side-by-side on a horizontal table carry identiz , +d;a xg14 5dcibmov42euqzcal 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 poigb,5uxv;za+ 4d m zdi1q24econt exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carry identiq45a vp:o4/kp ijto1ps. rm2v cal current straight toward you. From your point of view, thr/p4po qsjk 4.1oa5vmvi:t2p e magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force bett3 g07t*i3sg znlbv h9ween the wires is F. The current in eachgn39zgh it*v3 sb7l t0 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 proton moves tow q,k 6/ezp-efpard the east alongside and just south of the wire. What is the direction of the force on the p pzke,pef/6 q-roton?

  A wire lying in the plane of the page carrie8)2z(ozpivw o s a current toward the bottom of the page. What is the direction of the magnetic force it produces on an ele z(oz2 wp)ovi8ctron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal table. If6kk at. b9qwf/ the wires carry current in thefq69.k/awtkb same direction,

  Two long parallel wires are placed side-by-side on a ht+: h kaw ;mcuzgu4)r;orizontal table. If the wires caa+;t);ugkcmhwz4r u : rry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one stranddqi*ngig99km94p4 f/q3hz iv of wire and both carry the same c9/ ipigq*ghn4vzd qi k934f9 murrent, 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. Both are made froi (mwfj)5-ce zm one strand of wire and both carry the same current, but one has twice the re-5jfmci ()w zadius 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 carrying lo4 n :t6xd1lno ri)pj;o 0b5wevop occurs when the angle between the loop's magnetic moment and the magnetic fii1ln bed j4)x5opr: 6v0 wt;noeld vector is

  When placed askew in a magnetic field, a current carrying loop that is free ak60(r,9d z 3itpn0/mfer havmibv77to rotate in any direction will experience /3a0ivazv 7,i9r7mtemn0bdp rf h6(ka torque until its magnetic moment vector

  What fundamental fact underlies the operapl56 t vz9jrd5tion of essentially all electric motors?vd95j r6ltpz5

  A circular wire loop lies in a horizontal plane on a tableku9rumcve v; 4doe4 4/bq9-nk and 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. Which side of the coil tends to lift off of the table br4vo9c veubm9knu/4 d-qk ; 4eecause 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. ze i(o.di0z.: s4mxptdy*iv 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 ovd:st.(e4i o dy.0 .i*pzm xzif B, q, V, and R.

  A velocity selector consists of a charged particle h9h l1g,hximx2r.s.gwr +f 2 npassing through crossed electric and magnetic fields. The forces exmh+ wlx ,g2g1xhi 2hn.9.rfsrerted 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 0.60 A is oriented paralle8lt9g m s0zg8 7-dut7yvot8o ql to a uniform magnetic9 88gdlmyuqv-tgt0t 7s78 o zo field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directyw+m6lamu +o1s9fmgq* r 3lx (ion 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 wire carrying 5.0 A when it is pn3 l0(ef /kpsrlaced in ek 3/pl0r nsf(a 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 long has a mass +6twvjpsj8vbi k w j j-qe09ovq8/ f2,of 0.050 kg and is in a magnetic field of 0.10 T. What minimum currew+qe0/8j vjsvq9ow pf8bkvti6j2j- ,nt 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 cx)vmn451 ;h z fnwf4mi.sb-s 3vsad)is the magnitude of th4v bmxm3dn4sis1v)5n;fw c .fzah)- se 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 p1m+cyq d9utx / m p;0.(bjtakspeed 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 os3szz*x e-s((u,xd);jcnkq qf $5.0 \times 10^7 \; m/s$ 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 *h- qg5 la;q*m rf1delnorth 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 ofc49 z0 j vcernksmid(y;z)x:; $8.0 \times 10^6 \; m/s$ 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 sffbe2s) .:sxmpeed 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 oawo (m57,ue9toun+rr 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 of 25 A. What is thewc/.wma,v ()qjqv+ tl magnitude of the magnetic field at a dis)wj,vmtlq . wa( +vc/qtance of 0.15 m from the wire?

  A high power line carrying 1000 A gencqyah - 8s8m*derates what magnetic field at the ground, 10 c8dm-q* y8ash m away?

  How much current mustre()w2x lc0k 5ijq0 ux 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 carryi4h8 kf2o6h iipng a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's ma 42hki 8h6ifopgnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite :*vim mn;6er rdirections. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a * :vrmerm6n;i 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 opp ewmm42(mulo +1afcw(ns82f 0y6 lv laosite directions. The wires are selyncw42um8fl6af ovwa sm(l0m ( e+1 2parated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry curopq,r e+ -:s 3 m3m.vjphzurs,rents of 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 contprv mz-sqre,h :+sjp.u m 33o,ributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the gxy.sxvv-bfr) ,5 ,wdyt9uoe+x. y m; same direction. They are parallel tmgd.w;b,+f.yvux)xy9 -sro t v e,xy5o 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 one of the wires experience due to the other wires?

  Two long parallel wires carry ,7d,6 phvn6itigkb) da vkj r9o8+n5ucurrents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Finij bvot vkdp ndk6)+g,5u,6r8ia7h9 nd the magnetic force per unit length between the two wires.

  What is the magnetic field at the centerq8v mps y8( dvdsr.,wg4e5h)z of a circular loop of wire of radius 4.0 cm whemys8z)d,q4gw( h5sdver . 8vp n a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wi2fmtt +w uh)m mxk81;pre. What magnetic field is produced at )m1tut8h +mk2pw xfm;the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0v8cyj;;kybi rh7x ,1w A. What strength of magnetic field willk18, rb;ywx7ji; hyvc it have at its center?

  How much current must pass through a 4g)nzd 0f;p rc1tkx2;s00 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the2rf)c d1;;zs 0pnxtkg center?

  How many turns should a 10-cm long solenoid have if it is to generatpiw5dev y.:ao(9hdyhno t3*69 qtt2 (p 0ov xse a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment o dzxs((*7u . gsw) q. ig5f(o;dppxgpkf a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 ; *zugpp. g5w od.pgf7ssx(qi(x(d )k cm x 8.0 cm?

  A circular loop of wire of radius 06 w 2t5u m-vv1sjz,asv.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.,v61vv5 -smt j2sawzu 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-sectionc (ageki9/y8ed d/3hsl z3+ hval 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 currkardc o8:l2qd3 ,mt3mpppr2: ent of 2.0 A is in a magnetic field of 3.5 T. The dd23:c mpqkpm rrt ,3 2l:o8aploop 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 magnetic field of 0.30vx qshz. (dg y0lo o5r92(yir8 T. The cs8v rhq.o yr( 2 xdi(g95z0lyourrent 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 loop of wire of radius 0.50 m is in a uniuau36m n(zw5c lg/no)form 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 par 3cl5/ng)muouazw (6nallel to the magnetic field?

  A circular wire loop of n f:a,rqrbbc 9o04cqq1mc0xmp 75w-l 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 (charge e) t uwntf, fqepke* f;/ ajm+1b*zn6+x5has 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 wi5,f(k u yjdcy-th 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 8)na(1tna kdta potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the pro8n1na)d( kttaton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magn jt2lk/wy4 s:netic field of 0.30 T oriented perpendicular to its direction of mos wt2j4n/:yl ktion. Determine the radius of the path it follows.

  A beam of electrons is acca/hi sz86l.daelerated 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 parals8ihz 6a .d/ticles are to be undeflected?