If the north poles of two bar magnets are brought close t fnm3lc k8 i9t-bfkjdjh:o87h(q8 vs5o each other, the magnets wsklt 7jqfcv58(8f839m hi: -nkdhbjo ill

  If the south pole of one 8uww(7s(iw3n n 9uwhk bar magnet is brought near the north pole of a second bar magnet, the t(w wsu7 uw n8k(nh9w3iwo magnets will

  If a bar magnet is divided into two eqnbf0 2o 9yj 6(30auld1o v+kdd2fhgw eual pieces,

  The Earth's geographic No4p*3k8judwy z rth Pole is magnetically a

  The south pole of a magne0+ p16 f/7tljpgsc)lamj a- ept points toward the Earth's

  An electric current produceu,iv42avl s w 6b o,x m.skt2j)69baudep63oms

  Which of the following is correy:kqslyka , z03d3n*kct?

  A vertical wire carries a current straig1ij(hjd*s *m 6up j tvrj7k57hht down. To the east of this wire, the magne5 jk1dj ht6ms rv j*i7p7u*(jhtic field points

  A horizontal wire carries a cu/fwh8 8 52 *xacd3yy0a n(b zkqmob)zwrrent straight toward you. From your point of view, the magnetic field 2 xc0 )8y*w5yqwk b8/fa dm3oanhz(zbcaused by this current

  A current carrying loop of wire l,rqu yuq5g7nzj0u84 4 xyf2o mm9lln6ies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is th4q0urfy9g n6ou m 8luqnyl4 ,5m x7jz2e direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circula:y)l/ l,qmrem r loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterce:rq,lym / l)mlockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is the t6y e8(ahls0d

  1 T is equivalent to-conk jbb9a*d m+v4nw8z+fw u/o;b p2

  The direction of the force on a curr-7js*v:y u qxient-carrying wire in a magnetic field is described by:-*syv x7jq ui which of the following?

  The force on a current-carrying znmjx* ,5/8 yroonu6+kvsml 7wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero ww*9u2 xjcu , -hohd9 e3jts)oyhen

  A vertical wire carries a current straight up in a region where the magv;yj(w)yl e l4+g/.wh t+galicb0q3xnetic field vector points due north. What is the direction of the resulting force on this cur vg l+wth0acjl)x+bgy;/. w(ie 3ly4qrent?

  A charged particle moves and experiences no magnetic force. From th y21v-63/(mpjcl mpz fdhek6i4xp) 7m2gfl seis we can conclude tkfm2g/sj)ipp l-f v( 6e4 hd mx123zy6elcpm7hat

  A charged particle moves with a constant speed through a region where a sur;, z3 nm9*ps3eigtuniform magnetic field is present. If the magnetic field points straight upward, the maggr*3p n 3,;ezt9msuis netic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic;cu+bm 43nju e force on thisjb ;uecu4m3n+ particle

  A charged particle is injected into a unifg y-1yup0xb t q:m;.mo lj+d2gar z6y+orm magnetic field such that its velocity vector is perpendicular to the magnetic field veogbld1 t zmg6jr0+y-+2 uq;pa:yxy .mctor. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circulmnn07 zs2h-dv ar path in a uniform magnetic field. If the particmvhz 2dsn 0n-7le had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a chargqa*1cr9mhu)xhxh: am4l /8j fe of +e travels in a circular path in a uniform magnetic field. If i1jmhrqa f:x9a 4cuhx )8lh*/m nstead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moq57k .:)bb/0jv-bpp nq qddhrves eastward at speed V in a uniform magnetic field that is directed straight downward. The ma p hr-.n5kb/)bvdqpq7jb: dq0gnetic force that acts on it is

  An electron has an initial velocity to the south but 6d 3h6 t6x5l0 pwyafowis observed to curve upward as the result of a magnetic field. The direction of the magnpd6ay fox6t 6ww0 35lhetic field is

  An electron moving along the +x axis enters a regioy; 5jpesakcppa+; 30yzow p8/n 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 usp/oy;pe k;5+a0 jp3 8wayc zpp, and +z out of the page.)

  The magnetic field produced by a long 5nl8gx ./; /yb3clbjd3yw. s sf(qcb6ct a c:astraight current-carrying wire is

  At double the distance from a long current-caresvdy 88+ilmk)r1: dh rying wire, the strength of the magnetic fismlh 1 8:8e y+)dirvdkeld produced by that wire decreases to

  Two long parallel wires pdi*mxa 8wm2ato i09n3j1h1 oqe -bj;w laced 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- 1tbio1xa2hq3amidw8*mj n;o9j0we 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,d+( /ku , mmj;k+iz zt tmu(euoucc,bdcu880 side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly be zjice( , ubd8u8uz(umku+om0 ,/m+tktdcc ;, tween the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betweehz8*15af 0g0ddgyc, gaots k-n the wires is F. The current in each wire d8* ,01g a0kcgaghf so-dt5 zyis now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton mcrqeyqyo5u u9)zn 5/h 217syn oves toward the east alongside and just south of the wire. What is the direction of the force o yr hcsnq9 ny5q/)uy 1e572zoun the proton?

  A wire lying in the plane of the page carries a current alckxqkeatb70xb0 0*b2gkl4 j5 qs2, toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in thel2qqxj5gkbb 0aec bkt0 2*7ka4,s x0l plane of the page, from your right?

  Two long parallel wires are plau1e-pk o.4i/cs dlfv:ced side-by-side on a horizontal table. If the wires carry p.cov:fl/ ieku -1 ds4current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. ep+ 6pl41tr kf If the wpe pk61f4 ltr+ires carry current in opposite directions,

  Consider two current-carrying circular loops. Both are 0(7a*2hqx -lt vbneuz ,i lct2made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnlx7q 2ha2n,eu0*l- i (bzt vtcetic 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-wmc1:hjn, l c made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to-hm wl: 1,cjnc the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when txg*+otpjy ,s+1u*7cjc 4 mkbjhe angle between the loop's magnetic momy1* 4+c b+j *cujj mxopkt7gs,ent and the magnetic field vector is

  When placed askew in a magnetic field, a currbj mvi4cn 16j/ent carrying loop that is free to rotate in any direction will experience a torque until its min6/14mcbvj jagnetic moment vector

  What fundamental fact underlies the operation of essentially all (mme/g4kb5l n electric motors?m g5k4bm/nel(

  A circular wire loop lies in a horizoveql* 8:he kf7ntal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Ef eqv8: 7hke*larth'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 spectrometer a particle of m+v63*3 ykcpkix w wk*ut. ox7zass 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 of radius R. The magnetic field is uniform and oriented perpendicular to the velocity of the particle. Decwt *wk*pxz+ .3vk7 k6ouyxi3rive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists ofl/lf( ,znnc3gz x2s 8s37kalw a charged particle passing through crossed electric and magnetic fields. 78z,lc3nk s g 2alx l/(f3nzwsThe 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 electric field point?

  A 2.0-m wire carryingp,dg4 njt+* wtx :ig;u a current of 0.60 A is oriented parallel to a uniform magnetic fieldx ;i+t*w:ptdjg4 n,g u of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dqy+t +z4o+hlrys7f3 virection 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 it is /f0qgv 4o*mt b0zlxujf9eq-7 placed in a magnetic field of 0.020 T? The wire mat b4/g*fzq fueolxv9q-m00j7 kes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m ;qlc zxjg. 8pc/ujp 1*9jo 0 uh*sjm,hlong has a mass of 0.050 kg and is in a magnetic field of *1j ghupo /9. z*p8lumjcj0q sh,cxj;0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.ohxydlxtepz-7:zk47e v ezu- h;5ika ) d, c7-20 T. What is the magnitudd 7zh:hzpyc;5uxal7x -dt4i-v7kz )ee ke -,oe 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 wiqk*ya. 4 leniurqk/sjrxx9 -50l. c/ yth a speed 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 sp/az25hxx1 o jzeed 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 f p5* q5m rka+rc*m5v e5iwvkbcp/,wh6awn1,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 of s5c/jmq/voh4 ob u8u)$8.0 \times 10^6 \; m/s$ 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 a9 64txwek;vl:b njz6 y+fl dygf09 hw) 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 ( r;(czlfzj1zc2(xd k$3.0 \times 10^6 \; m/s$ 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 tet;ojeh2*p0ullob 5ep38s ua76 ,hza he magnitude of the magnetic fioa se 2lhu5epopjtb3zae*u7 ;6hl8 0,eld at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the gro,5g)tep b;vu kund, 10 m awayubv 5 p)t;g,ke?

  How much current must flow -8:fw):ujbrppo loksq;q 19tfor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of taqw 4 0. 4+ihekk,ohs5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field ofkoew .sqt4i4,hah + 0k about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. They a/kmy qnv-.i j qxm1.i)re separated by 40 cm. What is the n-kyiq .)vi /q mjx.1mmagnetic 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 cur/h:w )39-yhxd gdb u dmndl2;qrents 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 two w /dnudql2dh w;yd9g-3 ) mxbh:ires?

  Two long parallel wires carry currents of 20 A and 54uy juj a+ so.a, 011*kvtbdhy.0 A in opposite directions.04 s uba y1u jh1vda,*+ko.yjt 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 same d57,sw sdi sv4dww* y1qirection. They are parallel to the z-axis, and they pass through thy4d s1wiwdwv,q*s5 s7 e 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 wir0 jjcco8szy1g2mev 5 1es carry currents of 5.0 A and 8.0 A in the opposite direction. The wires ar2moz1cvjj 1c y8e5s0ge 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 circular loop of wire.6zs)) ,3ks:te,pj5 t gd f.ywpzrpvw of radius 4.0 cm when akvdp:3tze, 5f ,g z. s6yj.wptps))rw current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. yq-41hks8nacm8 d; ff6tud w2 What magnetic field is pr 814fn6datsk;ufmqch2 -w8d yoduced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of ;0dl/4 arj axn4.0 A. What st djl40rax/;narength of magnetic field will it have at its center?

  How much current must pass throuqq 6+znx 3 a/ a 2cdhq6w,mesz6i+lk/ugh a 400 turn coil 4.0 cm long to generate a 1.0-T mah+x6 / l3c2isa nkzqaqu/z6ed,w+q m6gnetic field at the center?

  How many turns should a 10-cm long solen uemb9 /rksxp0-k 8w,x ;jcro0oid have if it 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 car9 qawo +ysga2p-v;t a6ries 6.0 Ag6a 2aqt;+o-9 wpysva if its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radiu,d.pn122 +indnrnb )0ipyd ry s 0.50 m is in a uniform magnetic field of 0.30 T. Th y 0n ipiry+pn n2),rdb.d21nde 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 cross-sectionaq 2gg)1 0yjh q-bfs0hal 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 ofx*8-9pprwgd 7jsak4m4 nyp ) zv9szpih99z j * 2.0 A is in a magnetic field of 3.5 T. The loop has an arear7a4j8d 9zsvmp 4p )znx*9j h p*s igwp-99kyz 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 9,jv uh/lu 0fxof radius 0.50 m is in a uniform magnetic field of 0.30 T. The currentuf0xh ,j/lv9u 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 uniform malw,/v6*uetja dl x2w/z*s;pr gnetic field of 0.30 T. The current in the lax* ,*z6ljedv ;uprwl t2s//w oop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area xvkv:34gd xs7$0.25 \; m^{2}$ 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 partr0p 3 q(mfzm,kcob30ytfsfh+ f4 ua/8icle (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 o.bvi51 s wz:pvelocity $6.9 \times 10^6 \; m/s$ 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 n0 d*q6elqf8x,,qkq1k zq)h v l*ijz)moves into a magnetic field of 0.04*k q8zq,h0l*qq zk xni1e6)d ),fvqlj0 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magw2 *o+4dm db9+lgwyng netic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of t +lod9+4n*gbw2y dgw mhe path it follows.

  A beam of electrons is accelerated through a pot+9qzf jdbss mx4p(h3) ential difference of 10 kV before entering a velfj+hps(d 4)sz b93mx qocity 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?