If the north poles of two bar magnets are buj 5kpmhcwisse.4 * d4-kn03crought close to each other, the magnets 3h s4d-kc5wsi.e 0*pn 4jc mkuwill

  If the south pole of one bar magnet isxnm(gx3(1m xz brought near the north pole of a second bar magnet, the1(mn3xxz m (xg two magnets will

  If a bar magnet is divided into two eqj5g 13mdj bwq 2*bxow,ual pieces,

  The Earth's geographic North Pole is ma(/ejy gjk wfoik 91u.+gnetically a

  The south pole of a magnet points toward thr1 tthxs1) y-vul7u5a e Earth's

  An electric current produz3dl.do ddjpy b 6 uj*zx)n* vs3h3q61ces

  Which of the following is corr(vb anl3/d ;nmeffdz.+ n)s1e ect?

  A vertical wire carries a current straight down. To the easnb7/m i /p ebzg,9z 3(a.tlhhpt of this wire, the magnetic field point hlb 7bpzzp. i,mg e/h/a(9n3ts

  A horizontal wire carries a current straight toward you. From5 19k9bvu6 *lc zgmfsd your point of view, the magnetszl651 mkbg c9 9dvu*fic field caused by this current

  A current carrying loop of wire lies p35ihrhu nk+opk) 2z(h w ( g(kxk3i xl(e7kl-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, outside (e)w37uokhgkx p(kp+3ihnl2h i- kk5(rl(xz the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When viy jdd84- m9 vzpnf7(lrewed from above, the current moves around the loop in a cofp9(dd z47 r-jv8ml ynunterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magneva 1cdnpqd bo3m yf+/,.ci/-otic field is the

  1 T is equivalent tox( ot( jfk qdojp2*y30

  The direction of the force on a current-carrying wire in a ma2j7:jo yfjn8 vgnetic field is described by which of vj:fn 82 o7yjjthe following?

  The force on a current-carrying wie6me2sn/6y n,g la ho6re in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zerv(pze c fo2:d/0 lsxll .pza)kt*5d -fo when

  A vertical wire carries a current straight up in a region where the magnetic fz 3g. 7(zh,l ncowxqs4b nkz(4pdh3 9aield vec 49s3nwac(z .4bqpdzn7k,oh zg hx( 3ltor points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. e/y ba a8yq,7x From this we can conclude thata/8e,y q 7ybxa

  A charged particle moves with a constant speed b1ycll+/jifg)ckq : c, -fl//wua: gqthrough a region where a uniform magnetic fieldy+ a/b1 j/ qc gw: i/ll-cuqfc,g)lk:f is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle movesqjm2*+sg ox1a across a constant magnetic field. The magnetic force on this particx agmj+1*2qo sle

  A charged particle is injected into a uniform magnet+)aapao5ru,(/ rjo aq ic field such that its velocity vector is perpendicular to the magnetip/r5u,()a +raoqoaajc field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed trave-w7 uat1grg.7n pgcm75/ek u iling in a circular path in a uniform magnetic field. If the 5n-1 7u/7rkgu .wa7etgim gpcparticle 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 ca(u sp3 .by,fin a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have bee(cy3sa ,u.pf bn

  At a particular instant, an electron moves eastwabvk(he8/w ; gerd at speed V in a uniform magnetic field that is directed straight ev khe ;8g/w(bdownward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observg oyl-ykh /2r3nck:b; ed to curve upward as the result of a magnetic field. The ylrn 3g-boc/2y :k;h kdirection of the magnetic field is

  An electron moving along the +x axis enters a region where the 5mo20 12sng+u,.kiqkxfovqdt 60b d lre 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 o,vm no5ud1k s6+q2lk.bi20gdx0f q tof the page.)

  The magnetic field produced 8mb+e3w b /3 e*mx/ax b cqn0bd*zp8buby a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength o,d)xbzqq5 bq(k hj,ti( *9layf the magnetic field produced by that wire decreases ta( *zihqt(b b, 9x)j,l yqd5qko

  Two long parallel wires placed side-by-side on a horizontal table care,o iv0sx sn6qj(k(moxw b1 )odr)o c8t;2 4rgry identical 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 poin(s r) crqwb64 ;0d1(om,)x8e2 ok tjxgoinovst exactly midway between the two wires

  Two long parallel wires placed side-by ywi7tmt++c hm*, g ):soj8ttp-side on a horizontal table carry identical current straight toward you. From your poitgsthy+m j,t:*i p7ot cwm8)+ nt of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the forc soz64rp,m*wta,- dsve between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wiresaoss4z-rmwd,, * p v6t?

  A long straight wire carries current towardayv -xl4 rrn,7 the east. A proton moves toward the east alongside and just south of the wire. What is t,rn74-vrla yx he direction of the force on the proton?

  A wire lying in the plane of the page carries a current yrob xggi3o-.vw, 3mx-1 mit. toward the bottom of the page. What is the direction of the magnetic force it produces on an eleog grw.v tmim3.x3b-x i-,y 1octron 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 i2-iah n/e2g(x secc96wcre( a horizontal table. If the wires carry current(iicsg6ee 9(r2axew /hc -cn2 in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the il cx1,vo sx1,wse0y. wires carrysc,y 1xw .1sv,0loixe current in opposite directions,

  Consider two current-carrying circular loops9kukx.x lk,asp2 xmi8c ;/a 0k. Both are made from one strand 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 , cx08mkk k2px;/ixalk9 a.usof the larger loop is

  Consider two current-carrying circular loops. Both are made from one strand of 5+t15mn fo 8x,glly:1bglc wf wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larft+llf 5b1,8: n1m5wglx goy cger loop is

  The maximum torque on a current carrying loop/k9 asaumz +vy+/04u/+btvb ldmj ;sc occurs when the angle between the loop's magnetic moment and the magnetic fieldjmc+adv b0b +azltm/4sv9/y/;us + ku vector is

  When placed askew in a magnetic fiel76usw34isi tv d, a current carrying loop that is free to roti3wuv4st7 is 6ate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electricu/p+bzpn2g (t4d 1 jsd motorssud (g b4pzdtnj21 p+/?

  A circular wire loop lies in a horizontal plane on a table and carries current ikypi d ) jcq:dtto3o +2tp9u/8n 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 tendsk 28tdjo9pqcytd:+it u)p/3 o 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 charge q is zbu:; u sdeb21accelerated through a potential difference V and allowed to enter zs :;udu21ebba 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 throbjb5gokz b2uq// 8 j:ough 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 magnetic field is directed to the north. What direction should the 8b/z:u/ j2ob5okgb jq electric field point?

  A 2.0-m wire carrying a current of 0.60 A zyx j k:k9;h;wis oriented parallel to a uniform magnetic fiel;9kz;: xykhj wd of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction0ci*0g0vp2k8toel hoi id+3 w 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 g;g; g)9h jscfck/ 6lpa straight wire carrying 5.0 A when it is placed ihj p6; sf lck;g9ggc)/n 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 of 0.0zs(xj 6p*6sk y50 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the maxkysjp*6s (6 zgnetic force to cancel the weight of the rod?

  A stationary proton i*/ 21tfoq,kzsmb +ib qs in a uniform magnetic field of 0.20 T. What is the magnitude of the tbo if1+2,q s/zb km*qmagnetic 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 speedqijjg55-qgu q0.mdk w * (e0ks 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 slx.f ngal+d+ +e hr/h1peed 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 sl4vtx;j ca4s;yl nv81peed $4.0 \times 10^5 \; m/s$ 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 with8a3q meow ni,xf6lr-6 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 magnetic force of the electron.

  An electron moves with w s pl.7ff (m)qpa)0y ydje3u+o;koi0 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 k/1g8p2z i xeiof $3.0 \times 10^6 \; m/s$ 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 mag/8xa rulw- d/onitude of the magnetic field at a distance of 0.15 m from t w da//lurox-8he wire?

  A high power line carrying 1000 A generates what magnetic field at the ground, 1oj*g1l85+gjxpn9yynd4f g 49yb j n: s0 +ojd8npl g*syg j:1y 9j5nf4nbyx94gm away?

  How much current must fl)ya bf5exk )x9nls4yk y )(1n4bzech4ow 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 carrying zfh:u1 od ;t2nxd; zx;ds8kd; a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the z;sdn1xdhfdxt2z:;;;kdu o 8Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents qneamzc:x+-j:x n9qaqa7adb+27k a( of 10 A in opposite directions. They are separated by 40 cm. acdn:q7 xk n9ab z j(qaaxe27-a+ :mq+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 carryjb z+jbnx- rz+i(8 ndq(9 u)mdk;fd7 *ki;sg c currents of 20 A and 5.0 A in opposite directions. The wires are 8m kqs x fj9nn;d id(i+d*( g);7cujb+zkb -zrseparated 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 d n-)lw 2x-itokvs;e2mi f8u7rirections. The wires are separated by 0.20 m. At what point in-srfulm e7 o8vx; )-2wki t2between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same dur1+f. ; oc 3v1iosy /o+yvsepirection. 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 tpo.o i 1vv oyy/3 s+es1u+;crfo the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposite dirw.2dtt;s+euc dde o1xpp l rmhx, .9a6)fq3t,ection. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wdt pxe,p t)l2 u;tfxs6edra1qm 9, dcoh .3+.wires.

  What is the magnetic field at the centgjk 2nk+ud y69er of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in nj+2d9kkyu 6gthe wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetklc7 *8om e*(iyhi1fp( +fu fpic field is produced at the center of the solenoid when a current of 1mio1((pk*f lu7 8c i *y+epffh0 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a cur39p+ xrykfj b0)dqus0 rent of 4.0 A. What strength of magnetic field)uxqdspb k0fr0j9+y 3 will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generat 1yehpe5, oez(e a 1.0-T mageh pz,o 51(eeynetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to ufsq-9c3zlim-9zsfm c;e,h ,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 caq 72o ;1amchdnrries 6.0 A if its dimensions are 4.0 cm x 8.0om2h 1q7ad n;c cm?

  A circular loop of wire of radius y/f2 .o+zmg.hya y12dc: pfaq0.50 m is in a uniform magnetic field of 0.30 Tay: .cym/f zayho+f gq 2.p1d2. The current in 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 cro6 s)uu:z 8ool rqr f8i+i0yk(bp6clo9ss-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 ar s3ydu,0o 4aj5zpu 5h magnetic field of 3.5 T. The l3juz hr5opuyd40 sa 5,oop 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 wlr7 ix8s 4b4a /g x/vnx)rri8oire 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 / 48 xaiv/4lrgb s8i7)noxrrxmagnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius y+ h aaf2/ew v8-tyll00.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic 0a ytlal2vhyf/e+ w8- torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop;m4- vfzqf5rlz.j l( w 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, p4 0qn*-i ;g/lcvzcmpa 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 veloc9jdqx).feoq z x+.v6 hity $6.9 \times 10^6 \; m/s$ 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 moves inh/r8t m; avrg9to a magnetic field of 0.040 T. What is the radius of the pr tg8vh/a;9rrmoton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magne is: 8k:tm, wg7j5le51fyrr-mddn:gcogk h;9 tic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of tlrsdmf1:e9rig-c;:w yd:k t7g m, 8k5ghon 5j he path it follows.

  A beam of electrons is accelerated through a potenqialmx ip:cz +a7 l:z-r/8q)j2 gxm7 mtial 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 a78q)q:g jxl zmrzc p2 :ii7+m-l/axm are to be undeflected?