If the north poles of to09ar( gb n 1)msbgj6ywo bar magnets are brought close to each other, the magnets bb6ngsaoy 9j1 gm0)(r will

  If the south pole of one bar magnet is bv11.we 2a jlmprought near the north pole of a second bar magnet, the two l 1j1epm. vwa2magnets will

  If a bar magnet is dieu *,d dm1z)kxvided into two equal pieces,

  The Earth's geographic North Pole+wzxwf87+:4 l g cmcrq is magnetically a

  The south pole of a magnet points toward i3i7tv2lt8fnsi0mtpgc-u ((the Earth's

  An electric current terk4dsdg9 m3ul(by( zn3-r9produces

  Which of the following is co*))fytrh6q5 yab5o eb kb cwu m80;jq2rrect?

  A vertical wire carries a current straight 8s y-0yyju+(wp i/rssb.ly) pdown. To the east of this wire, the magnetic field y pwlyy(ys8)s ri-bj0p+/. uspoints

  A horizontal wire carries a current straight toward you. F +9o* uble ;e4dyq;pyirom your point of view, the magnetic field caused by t*u 4y;qo+9 p dy;ebielhis current

  A current carrying loop of wire lies flat on a tablec),mtt0tfc n1n a, lo/ 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 loop? The magnetic fiel,c/f oltnm0a)c1tn t ,d

  A current carrying circular loop of wire l(8e jabuj,j1r ies 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 mag( jjea,jb r18unetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magneticxm/6f5hwz .us 7saet3 field is the

  1 T is equivalent to-2ti t+x5vwfx5)e goj r cr+6jp6vp 0q

  The direction of the force on a current-carrying wire in a magnetic field is des h btm,2ocwfx;;u+ /krcribed by which2/rbf,w;;kx uh +mcto of the following?

  The force on a current-carrying wire in a magnetic field is the strongest whe.kt m 0 phc,n9oy *6b5ckaw2sbn

  The force on a current-carrying wire in 5oi5v1jk;u z:9tx l. zx 2q8r dyyg8vxa magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region whera.48g3s1n x)+c5dz)w fg.umgm5;c vdurzxi l e the magnetic field vector points due north. What is the direction of the resulting force on this curren1ra mf4.3 w )ug;dz sn 5cclxg5dum 8vzi.x)+gt?

  A charged particle moves and experienc0dn0utvs h+n; es no magnetic force. From this we can conclu dt;0hvu+ nn0sde that

  A charged particle moves with a constant speed throu1y6xp, kl (eprgh a region where a uniform magnetic field is present. If the magnetic field points straight upward, the mapl ek,r1x py(6gnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic forc:z;4o y*loa-a94hfs rypjt4i0 k dbv7e on this0ydj* 7;p bfiyoo4:vzst 4 l4 h-kar9a particle

  A charged particle is injected into a un8xlx3 mf t hict;zp,,a:b-g a3iform magnetic field such that its velocity vector is perpendiculba c3,8, lx3 ttpzax:;ifhm-gar to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in abdr01e;2 3os8bjdqiob;j up. uniform magnetic field. If the particle had been traveling twice02 o.ue j3obr sjdb1dpqb;8 i; as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path 4xa kmk)1mequepq b 5h -mc75-in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path wek amh x pc5k1-mb4qe)um-q75ould have been

  At a particular instant, an electron moves eastward at speed V in a uniform magn8rsmqi2ehqutg c :/ x3i1 r*zbjpy2;7etic field that is directed straight downward. The magnetic fo2*/tqr7ry8c 2seb g3q h izmupx1ji:; rce that acts on it is

  An electron has an initial velocity to the nbsws0s djpu)1r:m shs )cg5odch3+f3l)0t - south but is observed to curve upward as the result of a magnetic field. The direction os rdf+ug:cnlos0)htp)j 3-3)sds 1bwms h50 cf the magnetic field is

  An electron moving along the +x axis enters a region where there is 9 h. qmyv3;k2 okvpsngeu5 a4)e,(atka uniform magnetic field in the +y direction. Wke, ao2h5uytgep; km 3.ns9q)ka4v v(hat 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 ee (ifja2ui uj(708ke a long straight current-carrying wire is

  At double the distance from a long current-ca 8vixkqm 9(et0rrying wire, the strength of the magnetic field produced by that wire decreasestq0mx k(i9ve 8 to

  Two long parallel wires placmmc+ tb.9j / kd4c0nm*a 1fmxted side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wiretc+1. ndmm m904ajbtcx*fk m/ 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 side-by-side on/-(* lvxnjnbfxyyc59.to +t n a horizontal table carry identical current straight toward you. From your point of view, the magnetic field alfj(+ yxcy/t - .tonn*bx59n vt the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force bet0rg sd3 ihu gi,oaa7(0ween the wires is F. The current in each wire is now doubled. What is the magnitude ofg iih(dr 037a0ga, uso the new force between the two wires?

  A long straight wire carries current toward t)dwt d-e9 fis7he east. A proton moves toward the east alongside and just south of th- d9i)wds7ft ee wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a curren /sg-pa,7 xhrht toward the bottom of the page. What is the direction of the magrs7 , ahx/-gphnetic 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 ar() y 1zzrvh0uoblolu 04bju.8v d1z0ve placed side-by-side on a horizontal table. If the wires carry currentbvl40zl1z0)o8 y d0rj( u1 ovh. zuvbu in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the whm m0 yivn/t0tqr 3:c1ires carry current in oppqnvt r0 /m c1m03:htiyosite directions,

  Consider two current-carrying circular loops. Both are made from one st1xwdy 6xy* uw-d9rcy7. -bxvprand of wire and both carry the same current, but one has twice the radius of t.wxxyyw-p 97*1cxd-r buydv6 he 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.oml(bnn* khass 3q )pd(*n- aj2a l+j. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. (n- s a(.o n3kjp2d+salblanj) *qm*h Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrydy1m-q t5qn7p*m(-ukqf f (i+msa e8 king loop occurs when the angle between the lat(8 1*sfyq(m qmfk-5m e ud kq+7-inpoop's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying lostu *ro 8z61ngop that is free to r* nr1zsg8t6uootate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of es )uq: z/t6jy4ggezu ov,ox4c3sentially all electric motors4te j,quu/cg yz4z3)6o vxg o:?

  A circular wire loop lies in a horizontal plane on a01yt + g2 q)zfpozsv7p table 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 because of the torque caused by the currents interaction with th1)zt vpp2zy0o sfg q7+e magnetic field?

  In a mass spectrometer a particl cnkga+ l*n1m9e 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 ofn1ka l9*gm+n c 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 chjgp amrhbv/x 2k6.x*2arged 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, the particles move toward the east, and the m*26hx bx/2ra.jpkg vmagnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying atjq fme1,-n; aelb l66 current of 0.60 A is oriented parallel to a uniform magnetic fi 6maq6tfneb-ll,e; 1j eld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directionm *hfrrp 76gb. 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 wir cd)5g39g3fc o4hg,j apo xz)xk3p +ohe carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an a3ckg x)ajc4 oxpd5g93 oo+hzf3hgp) , ngle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0. qpf2:q;iqs.w 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 tqwf:p.2s;iq qhe rod?

  A stationary proton is in a uniwnvp:o9vv q vpj498d+form magnetic field of 0.20 T. What is the magnitude of the mag:99 jdwpn q+v8povv v4netic 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 of:lxhy2irg-t 84;ltcf $5.0 \times 10^4 \; m/s$ 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 s6x +ivr u/4o3z3xfa mcpeed 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 0eukqluv (11pnorth 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 fj3 hu/90 brcd2ab t--hcds) tspeed 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 withz-e xsvu3p8p9 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 of k ,60jf3rjol +zfo4uy th5(tz $3.0 \times 10^6 \; m/s$ 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.6, us jvsu ut)lxlc o2yh6,9)i What is the magnitude of the magnetic field at a distance of 0.15 m from the wirexhol6sc, )u) utyv ,29sl ju6i?

  A high power line carrying 1000 A generates what magnetic field at the grounsv r*:g l-0o7f0zj gmgag:/cb d, 10 m 0a7o*mgbgz g:/r lf0-j:c sg vaway?

  How much current must fe wo ncp*d)g) :.0uyfulow 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 straight47)mzfdmz2q bed*p ;x wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal z7;mmqpbf4)x *2ddzeto 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 )-pl; 9 o+zw3abu/pmli hszr1opposite directions. They are separated by 40 cm. What is the magnetic field in trhoaz;b/9 l u m)lwi1+pp3sz-he 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 oh ,8,5widy8af) sqctx pposite directions.8th ,,dq8)xw cafy5 is The wires are separated by 0.20 m. 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 dirxwd0d/uu zow1/j,(q; i,gb p yections. The wires are separated by 0.20 m. At what point betwq / /uyxb,g,i;wpd1ozj0duw(een the two wires are the contributions from the two wires the same?

  Four long parallel wires each ww *ltjq.j0yp ol6fka *lc gikvfd+-/s5c :3+carry 2.0 A in the same direction. They are parallel to the z-axis, and they pap w:0c3 *dc.j+q6-ll/a kltigfv +5sjoky*f wss 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 currents of 5.0 A and 8.0 A in the oppoami,qa4k7 /+l pi8tu usite direction. The wires are separua, u+ pa 4q/itimlk87ated 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 circular loop x6-q94gr. b)ch nk3/a ak;l (us myvzeof wire of radius 4.0 cm when a current of 2.0 Akmke-l uy3xzqnhbc./ ( )6 9argva4; s flows in the wire?

  A solenoid 20 cm long is wou w ()-jgcwyw; f(upz2smsw:/rnd with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a cws w:)2f/;ysgcp-mzw wur j(( urrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m oubi- cp 0a6qcy99r c/long and carries a current of 4.0 A. What strength of magnetic 9-q u/ cap b9cri0c6oyfield will it have at its center?

  How much current must pass through a 400 tu,z cox 1:-yocbu9n xy/rn coil 4.0 cm long to generate a 1.0-T magnetic field at the /nc,o1:x-boxyuzy c9 center?

  How many turns should a 10-cm long solenoid have if ie/i x 196vnlar+lu0wwt 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 turns that d2h1uns;d. iz pjrg- / bhxm;6carries 6.0 A if its dimensihdj;mrsgd b2nx uz;i-h p/61. ons are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is+sccvpf1nhq 5//lpz1 in a uniform 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 perpendicular to the mcp 1/lq z+snf c/h1pv5agnetic field?

  A circular loop of wire of cjq sd67rdmi55s0 5sij ross-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 carr8 kv6suz1svmow1- t/ qying a current of 2.0 A is in a magnetic field of 3.5 T. The loopkzt8ovmw /q 116s -suv 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 oxwcfj5k q4,*a uniform magnetic field of 0.30 T. The current in the loop *54qfcx wo j,kis 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 magnej 8di 2+8ig8 0jbfvsldtic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of thdj0fd b+8g8il2si8vje loop is parallel to the magnetic field?

  A circular wire loop lyb7-go. e tc -;gwg/sof 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) has a spgu wu7vvdv*36e d,-ifh5w*rd uy6)j qeed 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 velokud17jw2td3c*y2m +sscum t7 1yy7a pcity $6.9 \times 10^6 \; m/s$ 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 then moaza*s- xwnl0f5 wk-6yxs8 :asves into a magnetic field of 0.040 T. What is the radixasa-sz8 * sya5nfx :-w0lw6k us of the proton's resulting orbit?

  A proton is accelera,b-pl0k /oso30fbs smted from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to io-s3/s0,m pksl fb0obts direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated throujr n(9is squh6+2ef(xgh 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 particles are to be 6frh2e+s xqu j9( (nsiundeflected?