If the north poles of two bar magnets are brought close to *(+aqihdoi .q each other, the magnets w (i*hda.+iqoq ill

  If the south pole of one bar magnet is brought near the north pole of a secoe mkl6x,p+d16ur l( xxnd bar k+xpru( l melx1,xd 66magnet, the two magnets will

  If a bar magnet is divided into two equal pi/ /t6jwfi rgow c,qa5+ ;lxy2weces,

  The Earth's geographic North Poc 7/ki+dlj vr0j9)gs 5qe k)flle is magnetically a

  The south pole of a magnet points toward the Evi5z bjlmth6 6;y+9bo i t6a(aarth's

  An electric current prjepwo xdul9c8 +0 4ko1xej8y1oduces

  Which of the followin;h7r/s es/fx tc 4 h;(dz*zjzyg is correct?

  A vertical wire carries a current straight d8 wr8s9m rvorp/62iage,rnx b3k 63za own. To the east of this wire, the magnetic field poi ra6rbmn x 8 6 ,eazvkw93pgio/3rr82snts

  A horizontal wire carries a current straight toward you. From your ew0qbr m+i 8q5point of view, the magnetic field causediqw8 be 0r5q+m by this current

  A current carrying loop of wire lies flat on a tabl8jj9y:c 0 pitpe top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magne9 tjj:y0pp 8citic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table t zgq 6vp(n(az-op. When viewed from above, the current moves around the loop in a countzganz v6 -p(q(erclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fiels9um7 q fx )3dl) hn4.4ctfqfcd is the

  1 T is equivalent to3 ienjtrwm0oxgoz 059ks: .u,

  The direction of the force on a current-carrying wire in a magnetic fie,c x;ppmzx*: bk **jaeld is described by which of th;xz j,x bace mp**pk*:e following?

  The force on a current-carr-,ruz *o4uae t2 *xokzying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is-z.; d + 993htf kg m4gv(sgh2hdgopiw equal to zero when

  A vertical wire carries a ri2l,:1lgjk. p nu+njf3 0 uqmcurrent straight up in a region where the magnetic field vector points due rj1 ijlkmf 0+,u gl3pn:uq2.nnorth. What is the direction of the resulting force on this current?

  A charged particle moves and experieav(rfh 5a3 m1vnces no magnetic force. From this we can conclv(hr fm3ava15 ude that

  A charged particle moves with a constant speed through a region where ajpntl jka) x +5s2x4p+ uniform magnetic fi a4+2s+xljp 5pt)jxnkeld 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 move;u 6pim vvgp0b d,d jgie+2;q-0wtu1fs across a constant magnetic field. The magnetic force on this particleb;6+uwi p t,-u 0g fvgvqip2;ed m0dj1

  A charged particle is injected into a unics 2)5u ron(9j +psmm;qymfu(cp+ o*eform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the part2 f mp5cu(u()m or cje;m*yn9sq++ospicle will

  A charged particle is observed traveling in a circular path in a uniform mai dhfvw c59,gz1 o zr211oy:z:gmn zi)gnetic field. If the particle had been traveling twice as fast, the radius of the circ1 o): gmd iz9yzroz wnv2,1hf 1iz5:cgular path would be

  A particle carrying a charge of +e travels inn ,cmq wq9;rb;-y( jtu a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the 9 w;;cy-qu jrbn(tqm, radius of the circular path would have been

  At a particular instant, an electron movessj j ;6zof1lf, eastward at speed V in a uniform magnetic field that is directed straight dol6,ozfjjsf 1 ;wnward. The magnetic force that acts on it is

  An electron has an initial velocv th()r,r9a:amsfphuc l)-n 6ity to the south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic h,f9 6)rachr- psm)uav (t:nlfield is

  An electron moving along the +x axis enters a region where there is o5fhx3 fwd5b lj.pd9( a uniform magnetic field in the +y direction. What is the direction of the magnetic force on 59x3.5w ffo pbd(jhld the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight dp2ab3, jyixnj 0 h *2kpf/uoog/)/gucurrent-carrying wire is

  At double the distance from a long current-carrying wire, the strength oopgj2(9+zi-v bz2mu6 *lz ryqq+ 2 jbfrrs7/uf the magnetic field produced by that wire decreaserrjjzu+ z*q-+bsg6f7zlompr 9 /2u 2i(v2ybq s to

  Two long parallel wires pl/qa4sauzm/l5wl 2:cb8fk9 zz aced 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 wire on your left carries current away from you. From your point of view, the magnetic field at the point exactly midway between tmlswq z 52c/ba z kza/u9:4fl8he two wires

  Two long parallel wires placed side-by-side og o4im;t9nf v)jor13b n a horizontal table carry identical current straight towb g3)j 9tn;v of4i1rmoard you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carrygwk 8me.2vrdsu, ptb 24ps+j 4jk eu)* equal currents. The magnitude of the force between the wires is F. The current in ee* pup4mw8jk+g kvj4s )dru e.sbt2,2ach wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the eastrx-zq.mv q(tb):i ga uo2+s t,. A proton moves toward theuazqr2qxs :tv,ot(+-mb.)i g east alongside and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries aj6j- n+dj5qqeygg): q current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron t j :qqg-qy6+j )jdn5gehat 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 a hor8ikq* xa7q15zn r z02wut/csjizontal table. If the wires carry current in the same dire x1acu /qr*2k85wt 0sjqn7izzction,

  Two long parallel wires are placed side-by-side on a horizontal tabl6c m9 v1,jgbu6oueg 46- irdxce. If the wires carry cur u,j6-g1e6bcg9c modi64u xvr rent in opposite directions,

  Consider two current-car)y uz2 wn;b.6bj .dqodrying circular loops. Both are made from one strand of wire and both carry the same current, but one has db2yun..zbj;w6q) od 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-carrs0w :7 a9 iw5k4y3wrqmyky zl8ying circular loops. 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 thq ki 0kwls:8 ry 7y9w5z34ymawe magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle sxrl -e) dys.+pw)/0qev- phk between the loop's magnetic moment and the magnetic fieldhr+ yd e-.l)es-)qkwxppv/s 0 vector is

  When placed askew in a magnetic field, prv/tn5lh8wgoloq )k+5j(9d a current carrying loop that is free to rotate in any direction will expej qhl)8o/r9wn5l5opkvd+g(t rience a torque until its magnetic moment vector

  What fundamental fact underlies the operati (-ky0p p18pnamrm b*mon of essentially all electric motors? -p( 8ympamprm01* bkn

  A circular wire loop lies in a horizontal plan fi:oih.zge: p49v lg0e on a 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 tg:io: 4 hfp.ivezg90 lends 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 ac*g/bca 8 /33 zz(ym*dk/a abhb/bgtcle*7rkbcelerated through a potential differenhbab yz 78ab//b*z3c*bk lcg*akm/ 3rdget (/ce 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 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 pampgjrncf4u 2:*dlt xd3 +r.q-ssing 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 4-.ft:m qxd+ p*ldnc3g ur 2rja 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 owl4lh acrnr6 0 b3i7l1riented parallel to a uniform magnetic fil 4hailb06crwl3n1 7 reld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 :5dk f3 x9omyzhuv(s6frw)v, 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 whenbsr u(:ieoa5 w85;5:ko3 ze+lc yynoi:wlp 8o it is placed in a magnetic field of 0.020 T? The wire mycb (lenw:55e8ok lairo +o:iw ysz 5;3po8u:akes 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(/waqr,v-g:g a a-obq and is in a magnetic field of 0.10 T. What minimum current in the r/ao q ga- :(v-agwrq,bod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a unifo047a zvx(d ;fr 5cpxgzrm magnetic field of 0.20 T. What is the magnitude of thfc xx7rd(z a45;0gvzpe 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 speed of wh:3f 2rhmx9tey:r25)*w cel q j2wct$5.0 \times 10^4 \; m/s$ 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 spe+g2nwvyj04t 8xj7ed c9fq( ;iv3ujxned 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 wi;+ l. 0pjy 3a3cmmqjrdth 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 wiinkc; imenwy( , 3 .41dm7zshtth 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 witi7ehj0h4m4kq-w5vmiz ,v,ny h 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 8 z)dcv;m*/pk0eiamu- ll -.vk:qipl$3.0 \times 10^6 \; m/s$ 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 currib2cmmza 8i+n41d9 k e kh 2(.ql2gitoent of 25 A. What is the magnitude of the magnetic field at a dist mo8z1aikkenl2h g b9.di 4q2cm+ it2(ance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the 6en+.z+dz im jground, 10 d6jme+n z .i+zm away?

  How much current must flxou6x 2 /:o 4 zl bipo:j1-un7s7eja)gcs2im eow 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 carruj8 od6l2v+q )nx ;r ftdxf5g :zgr5(xying a current of 5.0 A is the magnitude of the magnetic field due to the wire j(+: ;6l8dgvq2rz 5)ogxtx fxf5nur dequal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry b(mq tm vic.-(gwu 4o-currents of 10 A in opposite directions. They are separated by 40 cm. W( t o4 -mvqbcum.w-g(ihat 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 carrywimx p4z 44*+ln;xhsb currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the txipmsn4*w4;h+ lb 4xzwo wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in oppositje 1.ui v hqd-n2zk,at9u 9kw8e directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions fehjutd wvk, kqa8-unz9i .192 rom the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are2bob4a ::adnpbu i tvq7d.k77 paralln2 abaib7 ou4vpt7 db.qk:d:7el 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 the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in jl (dp :c.x,e(x:vxjythe opposite direction. The wcv ,j:.x ylpdje(x:(x ires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field atkf7(6 5g ip8fymbo:g c the center of a circular loop of wire of radius 4.0 cm when afb(y5ipg6o78g ckm: f current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wirezyw by2)3wktb u:l )y +z4ir:c. What magnetic field is produced 4)+y ub il:2b tzw3r)w:cyzykat the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 t,7 c7 3mve(gbxstvz p tf*vu.d,4r.zyurns is 0.10 m long and carries a current of 4.0 A. What streng 3sv.yv(fv,.etmp, *7gdcb7 z u4 rtxzth of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to ge/ak2mx( lb. m1 nii,eynerate a 1.0-T magnetic field at thx/e. nm2(l,ykab m1iie center?

  How many turns should a 10-cm long solenoid have if it is to ge vnyb+-+nkt 8enerate 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 turns2jyd,5m115a yd wfgyv that carries 6.0 A if its dimensions are 4.0 cm 5ym w1gj1 , 5ydvyfd2ax 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a ug9i-xr9v 1tbl ) yf9beniform 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 p-bgeyx vf) 9l9 bt91irerpendicular to the magnetic field?

  A circular loop of wire oqmndj:ki 56769vx d yff cross-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 fir5 +1jzhyld6leld of 3.5 T. The loopr15zjhlly 6+d 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 a unifor acxf8rg)o tqy4shpk ( v691j:m magnetic field of 0.30 T. The current in: yht v4a8fr q6s1()opxg9jkc 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 0.5048o0twe8g ( db9jqa6bq c 4htw m is 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 loo488tdwqcha qo wgb6e 04( btj9p is parallel to the magnetic field?

  A circular wire loopi lawi3k;s77 v 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 (char enln sxlb o.u wd0pu*99n6*d7ge 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 velociu n x sug7.hgfc(+q*9ety $6.9 \times 10^6 \; m/s$ 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 wa6cr.us ma7..0 kV and then moves into a magnetic field of w.. um c6raas70.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerateys 6jnut;8td+ h+o6xd(lr (xed from rest through 500 V. It enters a magnetic field of 0.30 T oriented perp;xtx 8 tn+6(+( hdsleorjy du6endicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through 4lqrt,e;7aof ef9-kxa potential difference of 10 kV beforf7o-r 9keqaf4; etl ,xe 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 undeflected?