If the north poles of two bar magnets are brought close to each v :(3qb*lcz5p5msu rlother, the magnezlc5 3 bpv l:uq*5s(mrts will

  If the south pole of one bar mwcc 85+y/ , 8tqnzgreg7t.spu agnet is brought near the north pole of a second bar magnet, thw,tnyzcqp8u7 s .t 5+rggc/e8e two magnets will

  If a bar magnet is d:jz0 ksa8r4 /cg:csje,. m jiv0aa.guivided into two equal pieces,

  The Earth's geographic Northkqi3q1x x/z6 j Pole is magnetically a

  The south pole of a magnet points toward th:avbuz r0b3rzs *j;h (e Earth's

  An electric current produj1jb30 rr m7zeces

  Which of the following is correct?, rrg6-qvz94j fn:+hu2tqp (kadsd t 9

  A vertical wire carries a current straight dm hri o4+6f8tlown. To the east of this wire, the magnetic ftimf+h6 o8r l4ield points

  A horizontal wire carries a uk,f*pms2d i.cp9 qu xvh k7x;*xq,;ccurrent straight toward you. From your point of view, the magnetic field caused by thix, v iqkupf x;.9,mk *7u; xcqcs2dhp*s current

  A current carrying loop of wire lies flat on a table top. When viewed frmrxk-mr8x3 ih h -g4-qhbv(2 oom above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outsiv-rm hbm xhr xk-io4(q38- 2ghde the loop? The magnetic field

  A current carrying circular loop of wire lies flat okblb -o+wwoccc9b5:ar*(6po (hzs, gn a table top. When viewed from above, the current moves around the loop in a counterclockwise sensg69 p oclo-bw(s :w5coa +b(cz,rhk*be. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fievl3wjbxjai7 zqk vm*f0478( f ld is the

  1 T is equivalent to9cg9na2 5hzpq 0o njd;

  The direction of the force on a current-carrying wire in a magnetic fieldh:zy+9+sfu w/kp0dea-61b g)asv bi t is described by which of+)yszu 1 +wb/pdiet9 h0: bav6g ksfa- the following?

  The force on a current-carrying wire in a magnetic field is the strongest g(+b/u4d;cxi wd 8tnssi*oko d- ,.hf when

  The force on a current-carrying wire in a magnetic fi5rb;xatiho)ipl u3. *q6b; as eld is equal to zero when

  A vertical wire carries a current str b*0. cuq*a 5gvk+hcmmaight up in a region where the magnetic field vect*h+ . 5cvu gaqmb0kcm*or points due north. What is the direction of the resulting force on this current?

  A charged particle moves andwqcdq; iz2)+meu* vswa* - z7q experiences no magnetic force. From this we can conclude thatds*-i; 7cz+)q uqwwv eam *zq2

  A charged particle moves with a constah.+depdmji)hs kfhvu(e1 3)82udvm0nt speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will bkpuudhh h s8 md2(fd)v jee+)v3i0.m1 e maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic k t ,h gua6g)zkhpfy0p-* zb(8force on this particleft( ghy- bgu k6z)k8,pa* hp0z

  A charged particle is9l9m r66ri1(e.hbi ovs9kf- czm3twh injected into a uniform magnetic field such that its velocity vector is perpendicular to thb1o6tfh.zrm9vm sw-3 (ir c99le6kih e magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed t*/:bsd+jywmzsa+y- traveling in a circular path in a uniform magnetic field. If the particle had ba*ty/d y -+bms+wzs:jeen traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a un8 i4-i*r fxldniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circin8 idfl*4xr-ular path would have been

  At a particular instant, an electron moves eastward at om98+fjlp du5tg065kr vpo l;speed V in a uniform magnetic field that is 5 tr+k9ud ;5mj6v0gofll8o ppdirected straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to cu u 5,zmls5uc;p p3-iixrve upward as icp3um-,; l 5x5zps iuthe result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a .um2a i0f l2jzeo 4/fgregion where there is a uniform magnetic field in the l4mo2 g.0 2ij/zfef ua+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 current-carrraq6y7 d+97rs 9j n5g8n z*riwie5uae ying wire is

  At double the distance from a long current-carrying wire, the strength of tk) m:zqu27:q;n ilnh-(hel vvhe magnetic field produced by that wire dev 7q l)z(lmneh:- v;h2: qkuincreases to

  Two long parallel wires placed side-by-side on a horizontal table carry,p z00tkr5s,gaix do0h8do 6 k identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries curre5h sd0azko0r 0 dpk8,t6 xogi,nt away from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wirebru r(k/28ujds placed side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between th/u jr u2kr(d8be two wires

  Two long parallel wires c /k yax95- rni0weoba9*gp-bxarry equal currents. The magnitude of the force between the wires is F. The current inw0xixrg pkb59y9n--*ae / boa 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 proto x06t1ckmvm *0j0pxhr n moves toward the east alongside and just south of the wire. What is the direction of the 100h0t6jpx*c vk mrmxforce on the proton?

  A wire lying in the gpnl;u+p ( bg*plane of the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly towng +p; b(u*plgard the wire, also in the plane of the page, from your right?

  Two long parallel wires are placev1;pmj*gku9v 6td (mb d side-by-side on a horizontal table. If the wires carry currepjvvm (91m d6;k ut*gbnt in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. /(z31lcclc ko me+jass/6sr( If the wires carry current in opposite diremlcos(3cce/(/rjs6s z1k +la ctions,

  Consider two current2 p*:0vt alzmoqw15oy*p jc/a -carrying circular loops. Both are made from one strand of wire and both carryv cyo/o: 0pmq1* pwtal5a2z*j the same 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-carryingfj .lg/w kumf8ni7fo8; n uc*9 circular loops. Both are made from one strand of wire and both carry the same current, but one h8cfn7gif 9km*j/of u. n;w 8ulas 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 carrying loopzg0 k* i78(+ jsx,m axcpa1onv occurs when the angle between the loop's magnetic moment*pj,+ g8 sz7 koxxim1a(nac 0v and the magnetic field vector is

  When placed askew in a magnj f0q)-p qva/netic field, a current carrying loop that is free to rotate in any direction will experience a torque until itspf0 v/)q-aqnj magnetic moment vector

  What fundamental fact underlies3dk)qsdz nq/5wjk3yx(o v3*,usm(b x the operation of essentially all electric motorsj(vo3y/bs3,k q)s* xd(u3k zqwdmn 5x ?

  A circular wire loop lies in a horizontal plane on a table and c.w 1hwuj b mq4ns--ar3arries 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 oa.h- mjuw1q3wsr n -4bff of the table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particl h7q,3gj3oyc1 fnlh /de 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 orientedgh/lj1 3fn, hcy7odq3 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 consis z+a8 srszbjw1c rmw:81b: k8ats 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, themas18j818 bwrbrkc: a+w z zs: 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 oxge0nlnmr q)j7( ze. 0riented parallel to a uniform magnetic fiel0gm(e l7 znn0r.qx je)d of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A i.ve 5h9j+ dglsn a direction 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 str,0 vj pvyazgb- 3g.l-saight wire carrying 5.0 A when it is placed b3gp.a v 0vzgy--js,lin 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 lon;ol(;9ntoj ky g has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order ;j(ol;ky to9n for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field1d-.aiz50q:zdq*2f ozxo qjz of 0.20 T. What is the magnitude ojfz.z5qqd:ziax*z2q-1o 0d of the 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 sp wpr7-;esvtg2 eed 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 0/kt a/( vwpa)ibob3bz 0 bua5speed 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 due north with speed tl4jgskgk t:c( u6k;8$4.0 \times 10^5 \; m/s$ 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 (g4pvlx,y ce; 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 magnetic force of the electron.

  An electron moves with a sjg7th k)f /(fgpeed 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 qnmmf 1a81c(zf $3.0 \times 10^6 \; m/s$ 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.jwv:r1 auakkck1/ .q t2h*sa. What is the magnitude of the magnetic field a /tc .1uwsa21k* kqravhja:.k t a distance of 0.15 m from the wire?

  A high power line carrying 1000 A gec2 +t/owx42jbdvoqccx-8 dw:sk/( hh nerates what magnetic field at the ground, 10 m a+2/(h sd/4 bcvw-qc x8x cw tdoo2:hkjway?

  How much current must flow for a 3l j4ti.oco2kvj2z1$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wirnyjk m wmu-0+p: tn5;re carrying a current of 5.0 A is the magnitude of the magne pwnt0ykm5n;:+rm u-jtic 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 curtd0 l vsh9c /dbp,z18rrents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that i r0z9p/,t ddb18cvhls s 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry qluo)w2o )ldrnzn- - )currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 z)) l-o-qw)nnro l 2dum. 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 directions4-k72ky8 xhkxac 6 kd(lc6mmr. The wires 6lhd7(24crk kckx-6 8 mx amykare 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 dqe-usvy6lss+ h961u l y)n5rbirection. They are parallel to yrh s-6 bl96u)vslqn5ye+1suthe 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 curren+)wn+ly/k+y b sj5y euts of 5.0 A and 8.0 A in the opposite direction. The wires are separated by +jy+sw b+ en)lkyu/y50.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field az )63-jeq0i v5 ) si;dpzsijiua;9xe zt the center of a circular loop of wire of radius 4.0 cm when a z; sj ii)z v9ue50i3 j6zaq ip)dex;-scurrent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 tur6 afeevg8no );ns of wire. What magnetic field is produced at the ceon8vg e) 6e;fanter of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long84 )vlnt :o1.,ubhb mnupg/bg and carries a current of 4.0 A. What strength of magnetic field 14hnmtg.:/bbv)8o bl,p ugnu will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to gene: sm:lbl yn9h(rate a 1.0-T magnet9lbls:m yn (:hic field at the center?

  How many turns should a 10-cm long solenoid y p) *nvvxn29anzxs*7 8 7kv1nh 5aemuhave 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 th51ywo4cto6 b h8tskir0.+ fkurns that carries 6.0 A if its dimensions atbfh8 w6ork5+yk i4h st0 o.1cre 4.0 cm x 8.0 cm?

  A circular loop of wire of radius iuyu4 l,n1jf+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 maui4n+ ,ufyj 1lgnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crk. eg(:vr3ddx-dtdy 6oss-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 field0nf +d d tbokcq8y-7q (38gmdm of 3.5 T. The loop has an area8gmf 7t-qy dq nd8+b(3md0o kc 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 fe* y-y1 ;iwodpield of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loodwe*-p 1i;y yop is parallel to the magnetic field?

  A circular loop of wire ud 08 5owl pjf31z4eoosfflt,d m,2h04;hzyh 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 tu dp;llts2 1 4,8ymhofezf40f0owd 3zo,hhj 5 orque when the plane of the loop is parallel to the magnetic field?

  A circular wire loopj5hjx) 0u )em /ndcx4z of 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 ptk hpy10vwh ru7*u+dk6z5. y darticle (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 mypm81l u 5ams,m1j) wvelocity $6.9 \times 10^6 \; m/s$ 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 throu+8pr sv vexksg1o;4b; gh a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radiusbp8vs;k+xge; o 4rvs1 of the proton's resulting orbit?

  A proton is accelerated from r:flg15hhx/rm est through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to/ 1 x:hlf5mrgh its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of wx-iho4jsm3b6 z et/wbly-. * 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 particles are to be u x*mhy- -/zt.blj sw 3wi4oeb6ndeflected?