If the north poles of two bar magnets are brought close to eachek +rzoh88194 ekwkwz other, the magnets wree1w4w +kk9 8z8 zokhill

  If the south pole of one bar maz 3m g,401 r/scqg0x ewqt0wimgnet is brought near the north pole of a second bar magnet, the two m 1rqi30 0emgwqxz,wmt/sg4 0c agnets will

  If a bar magnet is divided into two equali+nyr 3s)c*7cy:08fwa ljf1zs acgg( pieces,

  The Earth's geographic North Polea;o. wkehlq, 1yd0yr/ is magnetically a

  The south pole of a magnet points toward the Ear p1jvr.gzhb6/mxr f5 s7)kfq3th's

  An electric current prow tjufe5)uu:9 duces

  Which of the following is corret( q7dg*mt +fcct?

  A vertical wire carries a current straight down. To the e)l h4(:d *c tpdthp7z2 feh2gtast of this wire, the magnetg)e2p hfd(2d *h z7tclt4pt:hic field points

  A horizontal wire carries a current straight toward you. From your j4)a yuqcl-q8 point of view, the magnetic 4yjlu -qqca8)field caused by this current

  A current carrying loop of wire lies flatbqkpy 1xzw4d( .8k.e; y rbpg; on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnet zpyypqe.b 1 4d8(b;x.rk;kgw ic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on 4cdka6*-f 7;smnr(i -vpo.vbln ny(t a table top. When viewed from above, the cud;p noa(n-rm y- l.ks (n4tbfc6vi*v7rrent moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic +9lp. e2wgugt8 iu)aq u:wb- ofield is the

  1 T is equivalent to-su ea+5n+ v dgrdd85d

  The direction of the f3yov( 7 lxwvhi0f v 1wk+a,p;porce on a current-carrying wire in a magnetic field is desc+7wahkp(, plo1; vx3v0w iyfvribed by which of the following?

  The force on a current-carrying wire in a magnetfzik818tb) gx 9t e/: ak avfan3zk:-yic field is the strongest when

  The force on a current-carryj*.b 9ntp*nu 8bgk0wbing wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where a2,8yh o0wq dat(z.rhthe magnetic field v. awoa2th r zq,80(hdyector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From thieqf-h;nstr m:2:xhu1; y nt+ys we can concludr fmn:hy2 nh;-1et:u+t; sxqye that

  A charged particle moves with a constant speed throuz9jit38 s prv/zr 7 +rqqz3;nigh a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this 8rzzj;3rn q st3z7q9pirv/+ iparticle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnet5 . tvlqqnlij7 q2e5-jic force oqi5 . lt-qevqjn 2l57jn this particle

  A charged particle is injected into7i6+ (lvfebbzzmn0 f2 a uniform magnetic field such that its velocity vector is perpeb2 zezf vnlm+b06 7fi(ndicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling i nplbg3:lx-0g +6ods/j bx4m in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the l b+x0l3j ispx/:6bgogm-dn4 radius of the circular path would be

  A particle carrying a charge 3 y9+p-: qkipoos1jdd of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a chao9:pyqi-dds1jk+ po3rge of +2e, the radius of the circular path would have been

  At a particular instant, an electrvbg79mm a5oeh4*il,6sm:jx r on moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that m vm 64lhesxg ,9:j*5m7airob acts on it is

  An electron has an initial velocity to the south but is observed to curve upwapm+3 qdzzf u te*6f.w f)c(um0rd as the result of a magnetic field. The direction of the magnetic f+umcw)td qf6f*u03 f (pe. zzmield is

  An electron moving along the +x axis enters a region where there is a uniform 5.op.mj4 j:q dtvsj+j magnetic field in the +y direction. What is the direction of the magnetpjjv5 4:j t m+.j.odsqic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-(aheyn 3nc )*fr;x3qv88 g8wht d /ikjcarrying wire is

  At double the distance from a long current-carrying wire, the strength ofdc-je1kbsun ,dlb+ h+g r97k: the magnetic field produced1:r cke7usb ldjk+-nhgb,d+9 by that wire decreases to

  Two long parallel wires placedfzc;oo/w f6 3u93 wosne *qame 6t,y*oj*6sge side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries curro9cnzq yojses w t*m3ef/oe6,f6 w3*u*g 6;aoent 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 the two wires

  Two long parallel wires placed side-by-side on a2beh :wqhdf0o)nuv.8ai4 o8y horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the two wi8w)daeo4nf ho80 2qh.iy vbu: res

  Two long parallel wires carry equal currents. 6rbz6-f nf9 gh The magnitude of the force between the wires is F. The current in each wire is now doubled. Whah69n6 -gffzrbt is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the eastx9- h -kbbdpi9ea 0;qb. A proton moves toward the east alongside and just south of the wi9qd- 0bkexh bbp9;-i are. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current t l;y-lbgaq,t nunt 2ov1*tr 78oward 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 the plane of the page, from your right1v ltra,bno7* tu-2 t;yn8glq?

  Two long parallel wires are placed side-bre8d+sg-k qfe) cacnb b j.73(y-side on a horizontal table. If the wires carry current in t ca8r3sq.d nbfkcee-7)+b(gj he same direction,

  Two long parallel wires are placedtd6;yn 4s0xez+e mofgv-8yi6 l 5cy*y side-by-side on a horizontal table. If the wires carry current iv-t8ms6lze5y* fyo60;dn4y c+e gyixn opposite directions,

  Consider two current-carrying circular loc0p8lvq3 2 wk.-zco qmops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the w.q80oc 2qzpl m-kcv3other. 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. Both are lb3 qdj1a+39gqok* ugmade from one strand of wire and both carry the same current, but one has twice the radius of the other. Comp3*okd ggqqb u1ajl 93+ared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a currenm;*gy;/yv7,8 bovts 3hi yjg6lbh ,tzt carrying loop occurs when the angle between the loop's magnetic moment and the magnett ;3h6mol;yv s8h/z7bgyv ,by it,*g jic field vector is

  When placed askew in a magnetic field, a current carrying eg)ajh-.v4z+buwz7((u bqv p loop that is free to rotate ie+jwhq7v(uz4ga(bbz.u p )v- n any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric mhoyaf36o. e5 9wddp c+x9w8 ijotors?9d.p 5ix+ 38h9yo6dcweoafjw

  A circular wire loop lo.2qcx.mc:q t doap.cu ;:m1oies in a horizontal plane on a table and carries current in a .um p2d::a o.tq1o .mc;xcq occounterclockwise 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 the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated sbr ; ic,p*)avthrough 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. Derive an expression fpib rvs;ca ,*)or the mass of the particle in terms of B, q, V, and R.

  A velocity selector consihzg l:q8a,o9 w r5gl.csts of a charged 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 :.qgwrhl5 g9oacz 8,l 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 isxdk mfml/mc++kn-*vk j062s sd:n ,vc oriented parallel to a uniform magnetic field ofkj d ,mk vc:nl*nxsksvm620 -+m+dc/f
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a x3qw-gh3ogbm)yi8i rjfh9;2 zw /2 hudirection 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 e yhu9 5a*chv,on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? h* uh5c ay,e9vThe wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a 1gpp84us ca23hxfy; vmass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order forfcv 14u3p8yg axs p2;h the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T.h n.7zl2odlf : What is the magnitude of the magnetic force on the fol :h7ld.n2z 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 withpdid7/ziko6y v6y-d/ 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 speed y*fv4*xy 5tad 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 fg* 47.ubq/mn8kvtwjwith 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 wik8gz ybyur j+rj:z (c) 7uz2*cth 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 a speed o.r9i-.o mgjnjba5k xf * pgmn6;j61za f $8.0 \times 10^6 \; m/s$ 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 sy2 b;fk-3vr1skfjg *$3.0 \times 10^6 \; m/s$ 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 2p7/dm n o8p22wdqv(jr5 A. What is the magnitude of the magnetic field at a distance of 0.15 m frommr pw/qn j(d87vdo 22p the wire?

  A high power line carrying 1000 A generates what magnetic field at 8s5 s:e-ta57vzdglu rthe ground, 1savzr -g8u5se5d7: tl0 m away?

  How much current must flow fo(4i4mdox*3x6 gsz5wkpph3ct.qif,z 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 carrying3/qbfd x)n qi;4 3necn a current of 5.0 A is the magnitudqf4b3n/ ednin q)c x3;e of the magnetic field due 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 currents1hbtmui65/ n1xu 0vt n of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm 05xmv1 ni tnuh6utb1/ from one wire and 60 cm from the other?

  Two long parallel wires carry currents of qw4g(/p8jpl (um6xmk 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic f((gxqwm6/jlm 48 pupkield midway between the two wires?

  Two long parallel wires carc6c/ 8i0ijvleqlsm a:s : *1oxry currents of 20 A and 5.0 A in opposite directions. The wires arvx /sslqiim61j:0 l 8:*ceoace 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 carrh fo(o7;*arv+qy8es t jo7 *cmy 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners*t+yf;sh *(8oaeo rv oj77 mcq 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 8.0nk.w* ful-fmvla6zip 4i 01 h0obly:6ci8e.k A in the opposite direction. The wires are separated by 0i:0lbnfc* o6l u l04.68 himkwyakze-1f .vip.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 of rad e pkfv(x,)vd3k61a sa8yoxf.iz6o8vius 4.0 cm whe ayskif)6pvo.ox1v8v 3fe6dz xk(8, an a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turnsn,lyav7sw05e67 )yt3u tbn li of wire. What magnetic field is produced at the centei)ay7y 0tw t6 ,7nb3nlvu5les r of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long *hffafg./7 (skg.ae oand carries a current of 4.0 A. What strengthsfh 7/.kafe a(g*g.of of magnetic field will it have at its center?

  How much current must pass through ae:uo* 8 lf xo;e;d076 jcfwfplhz7y -z 400 turn coil 4.0 cm long to generate a 1.0-T magnxfzy6hu*f8;7:jcw 0eeoo-l pfl7 zd ;etic field at the center?

  How many turns should a 10-cm long solenoid zletz psvq 2t)+wrn22 fhs2*9have 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 carries i / .jou4:;oajoa*wij ;snjy )6.0 A if its dimensionn jsja: *oyj 4;/a)ijo w;o.uis are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is;; v5lnqaj ym8 -jk)bk 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 perpendiculakjl5) ;k yn8-qbja;vmr to the magnetic field?

  A circular loop of wire of 6,c/e a,9qzpm rf2cwq 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 carrp*pkwi3okk vy fim*w3,d0j z .;jgk1 0ying a current of 2.0 A is in a magnetic field of 3.5 T. The loop;1k*kio0f3,w3wvgmkj dk0. *pyz jip 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 uniform magnetic field of 0(h8ym+bj,hslxeuw1 gv81 +/x qnt pl 3.30 T. 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?y,jp+ 1l/+nhbg8 (eshtx3 m qvxlw8u1

  A circular loop of wire of rad,:0 cxlz/fpz6hk2(liwvkb ,m+ kj3u db4oy) aius 0.50 m is in a uniform magnetic field of 0.30 T. The currenth llmd( 6z3 ifwz j+v,2p4)uy kb,0okc/xba k: 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 wire looppr-4srcg k. n( 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 (charge icp bi ,8tq67x,ah;n ge) 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 4 iow //2,yycpz t2qrcwith velocity $6.9 \times 10^6 \; m/s$ 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 kg mnzdxf (r)zw6*a1v3V and then moves into a magnetic fiexnmr1a vw6f gd)* (zz3ld of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerateep/1b0a 0k5c e -:k71 lah4( kpciliip a0epsmd from rest through 500 V. It enters a magnetic field of 0.30 T oriented piapk 0hia /s kb p401i0l5ec c-:(pe7ekma1 lperpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV befo1oltxc/l 2 r8 8feg9kk4ac8jore entering a velocity selector. If the B-fikk4o2 8/lxcrj9 c gla818fetoeld 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?