If the north poles of two bar magnets are brought close to each othtlnyh72,pv5 u er, the magnets wln2 5 yutv7hp,ill

  If the south pole of one bar magnet is ah n+rny3j+.n brought near the north pole of a second bar magnet, the tw++.a 3jhnnyn ro magnets will

  If a bar magnet is divided in))+ggs eiu i +j:(xoggtg7b4ito two equal pieces,

  The Earth's geographic North Pole is magneb ff,aocwejw,05)la7tically a

  The south pole of a magnet points toward the Earth's(hk.8assrt ; 3g; gstsdb2m6w

  An electric current producssf vo98o d*m1es

  Which of the following is )cpidi-eefxx3m oz)0mn ; brs9**0 g fcorrect?

  A vertical wire carries a current straight down. To the eastmx:xq.z,y., 0-xi rvy ;8; kms itgzfm of this wire, the magnetic fieldxm8g -v s;0;xmi qf,zxm.it.y z, :yrk points

  A horizontal wire carriesvi;+ cyp,vl i. a current straight toward you. From your point of view, the magnetic field caused by thisp.v y;,i+ vcil current

  A current carrying loop of wire lies flat on a table top. When vie1p9 id: zrstjt:i-9zv wed from above, the current moves around the loop in a counterclockwise sense. What t:vtjd-z9r z 9is:1 ipis the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire3q )8yj,uv 6 x8rk2 w36cjugnj/qnsop 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 the loop? The ma uxc/8 pu8j6 ,sqkwqgynvj6o j3)2rn3 gnetic field

  The SI unit of magnetbk/ id(vfi2f8 n5aait10.e tvic field is the

  1 T is equivalent tokb4 l 7+.xoz-x 9)zkic .ekbwr

  The direction of the force on a current-carrying wire in a magnetif0.ztdp vbze.. pi,x+ c field is described by which of the follbv,p.z.+exiz .0t dp fowing?

  The force on a current-carrying wire in a magn37+ lzyaqa:p e;aby /9+ixchwetic field is the strongest when

  The force on a current-carrying wire in a magnetic field i 6q b8xcsj9uuk8tvkd ;*9 +0xplpqra .s equal to zero when

  A vertical wire carries a current straight up in wd;2z bpdfu 0xmu ucd/8zi*2 *a region where the magnetic field vector point0*2 umcud wp dx/bu;df2iz*8zs due north. What is the direction of the resulting force on this current?

  A charged particle moves and e4qp.irq e6xtko q-1g)xperiences no magnetic force. From this we can conclude-t )k1 4qpi6o.rgqq xe that

  A charged particle moves with a constw2 d(8ce ukr;eqe 9ian(su y3q/c/ik,ant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the (3 dkyicee/asuke8iu2nr,;/q w q(c9magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constantjfke) x/k s-w8 magnetic field. The magnetic force on this partic )j es8k/fxk-wle

  A charged particle is injected into a uniform magnetic field such that its n64h e ,a5u;jw+ltg:st x;a nyveloci an h6;lxuw :,+ estny;at5jg4ty vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in ac(mv/rh -xh evl)xj uz *0l5d( uniform magnetic field. If the parlvh) rljex5x* v0d u(/(c -hzmticle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path ich1dv u946n v izox2p/n a uniform magnetic field. If instead the particle carried a charge of +2e, the rad 19vh62nzoic vux/4 pdius of the circular path would have been

  At a particular instant, an electron moves eastward atqm,rt-cgh).+w b0 okh 68rc2 lna)boi speed V in a uniform magnetic fieln- ra kq h. ohtr08g)c+iobc mbw26),ld that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial hv vv- 8g.h)hzvelocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic field is g)h-8vv hvz.h

  An electron moving along the +x axis enters a regil ky0*pvu s*2ron where there is a uniform magnetic field in the +y direction. What is the direction of the m20kv r** pusylagnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field prodlvwpap(0. jgl h 1 kh4*gkv2.yuced by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strenpqpl5: z+ fz,ngth of the magnetiz z5f +:pqp,nlc field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizolz;(cs0h i :vjntal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries currsihzl: ;c0(v jent 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 side-by-side onx -f)ogt1sy7a+ rl q,papr(/u a horizontal table carry identical current straight toward you. From your point of view, the magnetic flu-sypr x (op)1+rq/,gafta7 ield at the point exactly between the two wires

  Two long parallel wires carry /kr edrd ;xj -gho2,/gequal currents. The magnitude of the force between the wires is F. Th dogk,gr/;jhrxde 2-/e current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries c7c mmtm2p(.:l-lm0tk rs 1afp+6kudf urrent toward the east. A proton moves toward the east alongside and just south of the wire. What is the 7fs tlk.pl mm p (c tmad01+6k-rum2f:direction of the force on the proton?

  A wire lying in the plane o d9xyp935qulu)vbxl v2 vq 4k-f the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron thqq)k 5x byvd v 4-pvu2l9x39ulat is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-siziidcgv/5l 78,yxz 4p de on a horizontal table. If the wires carry currzcx,i74 /5 li8vzpygdent in the same direction,

  Two long parallel wires are placed side-byx ,ks6 /*n1kxq yln ko5;yzem5-side on a horizontal table. If the wires carry current in o;m1ynq xne6 o5ks,k/5*zly kxpposite directions,

  Consider two current-carrying circular loops. Both are made from one s5gm,sw,bce723r f , 2hiwkxjtcf78z gtrand of wire and both 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 b ezrw7 tk2,,75x3sjf ic2hwgg8 m,cf is

  Consider two current-carrying circulpy +f)oy txwy3nzl/58ar loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius o y )8+nxlw5zf/yp3y tof the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque onhh;/: 9rf6;1cxm-lny ykzzdx a current carrying loop occurs when the angle between the loop's magnetic mome:9 ;fh ;y-dn1yr6 ml /hzzkxxcnt and the magnetic field vector is

  When placed askew in a magnetic field, a ;pq7ye68d sop /7ae1 x6m:vanq hhh7fcurrent carrying loop that is free to rotate in any direction will experien p:q7hfhmp a s6q ed17ea6nv8y;xo/h7 ce a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all9r-mgqg r2t0i electric motors?gri g-2t0qr9 m

  A circular wire loop lies in a(4f39zxe48.n e.z ligkovh:wq elg 6j horizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field pointszoezn3j4gv4li l8fgw .k q .: e96ehx( 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 c u(28erh6mfmc2du + ubharge 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 orie2u mb2uu(df6chm8+rented 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 consistmha /meiu.qau *+l7.du wu h3b)o ;u-gs of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particamhuow-ui3 ;/a q g+)elu7mu*du. . hbles 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 c2bp4 jym 3rcc;urrent of 0.60 A is oriented parallel to a uniform magne2;cm3c pybr j4tic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A k lnpki6pn 9g(ud/7;8cm2x mu 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 m;pulm,ywz231z hvt /l eter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 Tmuvz,l3w1p2zhyl ; / 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 qm;h0uw); jt75dbfqzo ,u1z iof 0.050 kg and 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 rq)u0t;, f ;mqudzh 7wob5z1jiod?

  A stationary proton is in a uniform magnetic field of 0.o c 1)2-dudvyujk+( cy20 T. What is the magnitud)-(2jo uc cduk vyd1+ye 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 s o,q vtnjkjjjngerl 54-y/e 8u;6x(j)peed 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 e so ttko 32hmr1d::)u$5.0 \times 10^7 \; m/s$ 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 6tyol h *0rlum); fr/9ume:khdue 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 th .a .ys3:jmcof $8.0 \times 10^6 \; m/s$ 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 4i;qht*xf z,ewb)t ;m 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 speedhx b.o48syte;l4uk gxf,v+8r 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 of 25 A. What is the magn.d1-ghbetumuiox )8p /3+uanf /7zww itude of the magnetic field at a distance of 0.15 m fro wu+ta wn8mzi-. obuu) 7dg31ehpfx//m the wire?

  A high power line carryivaa65v:d v: mmng 1000 A generates what magnetic field at the ground, 10 m awaya5:6vvmadm: v?

  How much current must flow fo( 4 pu2jj):ykr kb9a6hunxxu 2e,h xc;r $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.0y) ;ko c:m1ul*cp h 8a6)ulycbw :*whp A is the magnitude of the magnetic field d:w:) bp)wu y1y*lh*6a uokpccl;m hc 8ue 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 opep)d2jaq cb-c-rnht/i: +v8 qposite directions. They are separated by 4atje2n-bp )c/id qqv rc-:+h8 0 cm. 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 wires carry currents of 20 A and 5.0 A in opy dahg/y dp.rqs/55 3dposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the two gd/y a/qd 5yp ds3h5.rwires?

  Two long parallel wires carry currents of 20 A and 5.0 A in oppos 8( f ck/om*nj*l136tjtkfs3fhuz8kfite directions.szu fkt*6 3/mko*l88(n tjfjhkf 31fc The wires are 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 samovmp2hns;/ jde: (y 6vfshg nnzdh)5:nf8a :4e direction. They are parallel to the z-axis, and they pass through the corners /6 fnng p;mz2(v : fs)ne ov:a4h:hsdhnyd j58of 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 currentszwu5 mp/ 6zz5q of 5.0 A and 8.0 A in the opposite directiow mzzz5u56 /pqn. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circulhp57qhjlqc( +ar loop of wire of radius 4.0 cm when a7q hc5+lj(pq h current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 500eq1z.o 1ht) ig0 turns of wire. What magnetic field is produced at the center ge.)iq ht1oz 1of the solenoid when a current of 10 A flows?

  A solenoid with 500 turnsy e bh7848xlr fbxkm., is 0.10 m long and carries a current of 4.0 A. What strength ofk7h,.xelr4 8bbf ymx 8 magnetic field will it have at its center?

  How much current must pas xx0endi tp*fs.;t).x n/q yedsm(7v;s through a 400 turn coil 4.0 cm long to generate a 1.0sf die)y*. entv.(xd0p;; s7nxxmq /t-T magnetic field at the center?

  How many turns should a 10-cm long solenoid have if it k8 bfqox.7 3ajis 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 turns fm ))k47mu ocjthat carries 6.0 A if its dimensions are 4.0 cm x 8.0 ju)ok fm)mc47cm?

  A circular loop of wire of radius 0.50 m is in a uniform magne pn7qi uaj:6j5tic 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 perpendicular to the maia:6q5jjp nu 7gnetic field?

  A circular loop of wire of cross-sectional lkf x ih.dij9:0s8m x.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 uzj qjn0zx *llm nb43 scwg171-j x8g2i10vdimagnetic field of 3.5 T. The loop 0x1 s7d cgjwjmj zl*8i24zb-1ul x 1nvng0qi3has 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 wijkp. 5;o:uz)j obta5sre of radius 0.50 m is in a uniform magnetic field of 0.30 Toj5.5 takb: o; sjp)zu. 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 loop of wire of radius 0.50 m is in a unifor y6.1q h t aaq7usox.e1 z;:2o9mvcuofm magnetic field of 0.30 T. The current in the loop is 2.0 A. Wh2azs oqte hyu:x; v6uqo 9.a71mof c1.at is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area ,sp:kv1h0/eo ii 6thd$0.25 \; m^{2}$ 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, at6yl:a z. nx9g single-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 with v dqgk; 9fnb;biyk-;u- elocity $6.9 \times 10^6 \; m/s$ 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 1u7udyr -*(f ns c:hx6c.0 kV and then moves into a magnetic field of 0.07x6c*-(:s rfunc yuhd 40 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 t vfv 8k/0iqt6V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Deter6tt/qv 0 ikvf8mine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differe*wg t91cf:*9)rxbpk 0d)5hk a rb bvffnce of 10 kV before entering a velocity sekb 9) pvrbafk5tfcfwhd:x9 0)1g**r blector. 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 undeflected?