If the north poles of two bar magnets are brought close to each otv e(m4zve1cb-7i- lvav3 zp/wher, the magnets willw7evmbv c 1-/i-apl 3e4( zvvz

  If the south pole of one bar m2n 6g/hju;p5m :.npe xmq m9fel)2gndagnet is brought near the north pole of a second bar magnet, the tw:pp glu6xg nnjhd/ 2nme 2)m;9e5.mqfo magnets will

  If a bar magnet is divided into two equal pi1h u)sqo*py+ c7 gz+tweces,

  The Earth's geographic North Po2k3 gl/r7tqpbigah szi)k;r u l 67;s9le is magnetically a

  The south pole of a magxjve5g8*ut k2pa or5 ;net points toward the Earth's

  An electric current p:28 pqiimw(sp*p 6kva roduces

  Which of the following is correjwdx z+ ;s34 g j*negtjn*b:;ys9 roh+ct?

  A vertical wire carries a currena: s buw/d:toll(9;tr t straight down. To the east of this wire, the magnetic field points/w t(l:bl:9tdsa;o ur

  A horizontal wire carries a current straight toward you. From your feuf2zc1cft(*2s x 9rl-ypy 1y:5t ;a 4tqvfrpoint of view, the 1*uy(q;tys rpft5l924 -c v:t1 faf z2yfxcermagnetic field caused by this current

  A current carrying lo*7l,s(rcr+g/w 3hdv kyn*rekop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sehk*r (l s/+rg7 kcd,e3* nvywrnse. 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 3o2;nnt oo 7bt )eqy8-uxtm oobn0f6lh2t)c4 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 the loop? Thxont6o e 2 )oqto ;hnut7mblt8 2o3b 0y-nfc4)e magnetic field

  The SI unit of magneticn*av6p (ov cqmp rqx) *6.v pav4zilu3cq(87q field is the

  1 T is equivalent to(c 4riaqb gu rd)l,v*:

  The direction of the forcermku bmm :3(uhc1uhs3ck 2 ks 2:ru7g- on a current-carrying wire in a magnetic field is described by which of the followingbc1u23 ucumm r2ks r(7g3km sh- k:hu:?

  The force on a current-carrying wire in a magnetxio8-f; 28mvzne *irqk; o5aaic field is the strongest when

  The force on a currenn9sfqfbpz1 1)v; f p2jt-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a i,wnm67.n6 c k;qgr vpcurrent straight up in a region where the magnetic field vector points due north. Whatrm ,ki pqc.;66g 7nvnw is the direction of the resulting force on this current?

  A charged particle moves and experiences no mae n6x.f(m k2 kc9zn 9uowp,:efgnetic force. From this we can concludep ufwfm.kkec29ne:, zno(6x9 that

  A charged particle moves with a constant speed throusspv:- 1ea+m*y2uko-k y 3tb hgh a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particlv-*bt -3se1+s k2ya: pmhy uoke will be maximum when the particle moves

  A charged particle moves acros8 4n*k:k bnryss a constant magnetic field. The magnetic force on this :kbr4s8*nkn y particle

  A charged particle is injected into :kr(g jtcmcmuh k+ s;kp :z21/a uniform magnetic field such that its velocity vector is perpendisg t1m r:juhp/:c mk; 2c+kz(kcular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in z+ wzn, 6n teunq2,td7u2. ,van8fauba uniform magnetic field. If the particle had been tr,uv z22ew,nautnfn. 8+7nq, 6 zbtadu aveling twice as fast, the radius of the circular path would be

  A particle carrying a ch2qd:i+m.in.bl , bfjl1 5wtyparge of +e travels in a circular path in a uniform magnetic fieldqy+ 2plbiil1 d.bmf5njt,.: w . If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron b(xg qm f(j:72 co+;cseospc1moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic f(cp (2o+cojxbgfme s1c:7qs;orce that acts on it is

  An electron has an initial velo y110f/9ir xo:qjljxf.-e qr xcity to the south but is observed to curve upward as the result of a magnetic fioj : rq1-f.yx /1q0fxlei9 rjxeld. The direction of the magnetic field is

  An electron moving along the +uf3rs 4ekxcgx t)*ct)6b b3r/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 tbbeu) xr6)* c/ 4txscgk3 3ftrhe page.)

  The magnetic field produced by a long straight current-carrying wire ials 8-ty 4w+rjs

  At double the distance from a long current-carryins3(yeynl asaha; *cn4wke: ,g qcd0*8g wire, the strength of the magnetic field proy cn 3,cklhee0a* q4 nayg a*:sw8sd;(duced by that wire decreases to

  Two long parallel wires placed s rsx oxpqu0+ij0x,;2 b /chix0;1,ijizlxi0aide-by-side on a horizontal table carry identicalx 1bxsj+i 2caxh0o0qip;i0i/ x0jl,rizu;x, 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 the two wires

  Two long parallel wires placed sidp03kjrd - fm2ze-by-side on a horizontal table carry identical current straight toward you. Fror f2 0m-zjdk3pm 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 brd b 12ng+0t ;zeh*ocjetween the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wire ;j0b dhnc2*1gzt+eors?

  A long straight wire carries current toward the east. A proton moves toward tpx-.jnpkh*5 phe east alongside and just south of the wire. What is the direction of the force op.* p-xnph5 kjn the proton?

  A wire lying in the plane of the page carries a current toward the bottom dckrj8vaj1e fupw n3 je32z y)bp c*/.m5f-;m of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly towaj.fec2 vj bpkn c*pdz ;r/j)em3mua8y31f5 -w rd the wire, also in the plane of the page, from your right?

  Two long parallel wires are okd4eil1u.s 7: gu:gwf )wr5oplaced side-by-side on a horizontal table. If the wires carrr :go. kou:fd7w4ew)lg 51 siuy current in the same direction,

  Two long parallel wilcu/ z /3)5x y0lsxhlrres are placed side-by-side on a horizontal table. If the wires carry current in opposite /zll5 lr cx hs0/3xu)ydirections,

  Consider two current-carrying circ 2iy7a56p zf5pl:o uicular loops. Both are made from one strand of wire and boti zo:cf7ap65i pyu5 2lh carry 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-carrying circular loops. Both are made +zn -xuvrl yx08)lwb5from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the ma)z yrxu- 0b5+vl nlw8xgnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying l1fu1b 2b7e lj7/epngsoop occurs when the angle between the loop's magnetic moment and tp/2 e jue7fbgn7sb 11lhe magnetic field vector is

  When placed askew in a magnetic fie ce mwmq.v-s 6v057, bp,yh)bp: ;sea tyn-cttld, a current carrying loop that is free to rotate in any direction will experience a torque uc ;-ba6 m:hptst,necw ,y5b-7) m.setq p0vvyntil its magnetic moment vector

  What fundamental fact underlies the operation of essentially3 g k8 )cmbz.9l t.:cuwmxjpt,.1 rzkg all electric motors?. )z cw.gmb3 :klt g x981.zjrkpumct,

  A circular wire loop lies in a horizontal plane on a table and carri d6em7 jwmz7t c-m hx .k5zd3c36cbzp:es current in a counterclockwise direction when viewkx6cdb-t3cmc 7dw p5.mz 6hz:z 7m j3eed 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 because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectromete r3d (w1ht2belr a particle of mass m and charge q is accelerated through a potential difference V and allowed to entet 1eh23 rd(lwbr 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, V, and R.

  A velocity selector consists of a charged particle passing through crossed 8i( slst*+c0jay xjv9electric and magnetic fields. The forces exerted by these fields are in opposite directions, a 8(*ssx 0t lc9aj+vyjind 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 uni/oqfdjurfajv1,6 1n ;* d*cy dform magnetir* o *f ,/jnvcayud;fd116qdjc field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of z-tjpy0t z9 d210 A in 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 straight wire carrying 5.0 A when iz( xizr9f mhe7m/0 0i0mr1n pmt is placed in a magmm1z(i9/h enr 0p mm70 xrf0zinetic 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 of 0.050 kg 7wc40fo xpz/xand is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rozp 7xwxc04of/ d?

  A stationary proton ivo 9v-mcf9o*is in a uniform magnetic field of 0.20 T. What is the magnitude of the magnoic* mvv -9o9fetic 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 speed jpqfw-) fnpc0*c-e0fn hvh7ap 16 -kzof $5.0 \times 10^4 \; m/s$ 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 oa /13 jmic+njjf $5.0 \times 10^7 \; m/s$ 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 spee1j*n,xn hk 1yxd $4.0 \times 10^5 \; m/s$ 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 s: 9 frk(p apw-yk2q)xqpeed 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)q) z su01 n im3x9f;+: akautnl4pidn 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 4fka 0+r z;+x;egvq wvof $3.0 \times 10^6 \; m/s$ 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 cwy pb7p0 /:yjrarries a current of 25 A. What is the magnitude of the magnetic field at a distance of y7:0r wy /pbjp0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field agd :tt19u8mqf t the ground, 10 qd:8fgt mut19 m away?

  How much current must flovdwzf6la 9f/ v*/ igm0w 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 cp+e.vu ouwu o6pe;: k8arrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the E:.okv ep+u;opu uw86earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wiresj*wpdg n n0;+(6s mfby carry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane o+(w;n* sn jmfp6b0gydf the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires cabqcc)r 4x7p )grry currents of 20 A and 5.0 A in opposite directions. The wires are separated by rc7) g pbxq)4c0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry curreglu pc,ii0jb 4oe8*a- p g3; (z.otfgfnts of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. A8z,p go*fi0-p 3(i4go;bfct jlgae.ut what point between the two wires are the contributions from the two wires the same?

  Four long parallel wirer4ogkj8 t o56as each carry 2.0 A in the same direction. 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 one of the wires experience due to ooga84kt 6j5r the other wires?

  Two long parallel wires carry currents of 5.0 A and f 0 3jyxwx2h:a8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit x3jhaxw 0yf 2:length between the two wires.

  What is the magnetic fit5oqgd ,, 2ejk-z usk12rea3leld at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wig ,a,e3 sd5to2qkel-kzj1r 2ure?

  A solenoid 20 cm long io22; v hqowp5es wound with 5000 turns of wire. What magnetic field is produced at the center of 5ewo 2 vh2p;oqthe solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. Wha-l7w fx -151gebh+ilgqq:/cwmydk*nt s/ mghk5:flqb-yl ngwx*dc7 +1e-qwi1trength of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0t mp a3duyh(a)m6,p0o cm long to generate a 1.0-T magnetic field at the cenp0hmaau)6op3 ,ty md(ter?

  How many turns should a 10-cm long solenoid have if it i a*+r+q14lhdjexk:(ok yq d 9um( :l4vdr.zhf s 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 t7j )jlv8tyb;ydc dns*49 imv ;urns that carries 6.0 A if its dimensions are 4.0 cmm 849b;n styydlv*iv; j c7)jd x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in+gc k e3-n5xi)d qpn8a a uniform magnetic field of 0.30 T. The current inpcg8n5 )d+k i -x3neqa 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 i59dro (bbq-ional 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 cur 5hlvs04 w,/ u20bdivw5ap odrz:vpu1rent of 2.0 A is in a magnetic field of 3.5 T. The loop has an area of owz v,dva/piv 10l2 ubsp5:r h05wd4u $0.12 \; m^{2}$ 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 w- qdsu-j7b.7hpbos4 in a uniform magnetic field of 0.30 T. The current p7. -bu4bj s-qw7shodin 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 uniform magnetic field hs- m 7knva8a5of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parak 7s8mah-nva 5llel to the magnetic field?

  A circular wire loop,mh/n)m7 iojltp o .4u 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 particle-jao 1mofsnz 5/;h9lo z-km(p,s9hy lui6 yl( (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 vel btg17g6xky6k.zpml r.478jrkui e*nocity $6.9 \times 10^6 \; m/s$ 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 thelgnxs7) 7)g zkn moves into a magnetic field of 0.040 T. Ws7kln g7) xg)zhat is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enterezc90s zz-o i)p+,emls a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determinemo0i,s-)zc9ez+lz p e the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of v ;-h7id9 ftwq10 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 particleqf hwdi ;-79tvs are to be undeflected?