If the north poles of two bar magnets are bro wyw)x 8iz.nw,ught close to each other, the magnet)x,zy wiwn8 .ws will

  If the south pole of one bar magnet is brought near the nmw6rwc//:v 4cg ;dcmgorth pole of a second bar magnet, the two magnets wilm:w6; c d/cw4ggcvmr/l

  If a bar magnet is divided into tc;vx2p)ka 8c ds5yx7nwo equal pieces,

  The Earth's geographic North Pole is magner7zwi hk7*7hc tically a

  The south pole of a magnet points toward the Eaqmk6 izsrpif*f ;pa/w5:4wc ,rth's

  An electric current producb* s/p,uu r7;9zny ivvu2s* dces

  Which of the following is(,bbcmkot10kqd l qg03ya5 04s xfdi) correct?

  A vertical wire carries l2yysx, +r1gva current straight down. To the east of this wire, the magnetic field point1xlvg+y yr2 s,s

  A horizontal wire carries a current straight toward you. From yoursja n35j.ttzvi lc+*/ point of view, the*s5v/. jnj 3+izt ltac magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viecamt42 r mo0v6s *kzw:ch.m 6vwed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this currentkmwc64crv2 ho. m *6vzt msa0:, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. Whenk-ib hj+ q( nl 6lnz a(*p:x2wyob+su4 viewed from above,w( 4ylb(+ aqn* -oshln6 2bk:+pxuzj i the current 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 field islyn(.k4 w ,vg -f0qynf the

  1 T is equivalent top6y wke ./6i::g kwyhpcwka59

  The direction of thedmt b) ry2*ntrba/h3mp9 )wl3at8-gq force on a current-carrying wire in a magnetic field is describem) l/rbbr 9gh*d a38)2tt3pym-wqtn ad by which of the following?

  The force on a current-carrying wire in a magnet7 det5*i6tpltic field is the strongest when

  The force on a current-carrying wire in a magnetic field is/r:co7sxu 2khpjg2d8 equal to zero when

  A vertical wire carries a current straight up in a region where 6j+m xy*nn0uvthe magnetic field vector points due north. What is tmv *6njnu+yx 0he direction of the resulting force on this current?

  A charged particle moves and experiences nbuwak)s 4j 2r k.tws;bd 6z(sp-:yx*fo magnetic force. From this we can conclus*)x (6.p sba wkj-buf;k:ytdr4 2s wzde that

  A charged particle moves with a constant speed througvfq p: ;cb5vw+s dx:x1h a region where a uniform magnetic field is present. If the magnetic field points straight upward, cv : df5qwx;xpv1:sb+ the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a c zqxo7 h-(m4 kaw8jjju l-j84aonstant magnetic field. The magnetic force on this particlem4oqxj7aw4h 8j-(8 ujlz ja-k

  A charged particle is injected into a uniform magneti;vc cxui68cqx5 e) h0rc field such that its velocity vector is perpendicular chi)e r08;6vxcx qcu5to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform magvs0c37 bq4t,ne *iym pnetic field. If the particle had been traveling twice as fast, the radius of the circular path would beb* sqi,0p4ty3nv7m ce

  A particle carrying a charge of +e /ab.6- 2w k77wm.tjx x prjdmmtravels in a circular path in a uniform magnetic field. If instead the particle carmp.7 a/rbdm j 6- 7k2xtwxjw.mried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at spgbsn/)/hx q9ioqz /v* eed V in a uniform magnetic field that is directed st)* zx/hnbqig/qs9/vo raight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obsnbvazh, 3jq4qre- i8: erved to curve upward as the result of a magnetic field. Theqhj4, v-i3aeqb: rn8 z direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a nh.9ewkmj4z 3 uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+nw 93hz e4k.mjx to right, +y up, and +z out of the page.)

  The magnetic field produced by a longf(gd4psi9wdt b+ r* h4 straight current-carrying wire is

  At double the distance from a long current-carrying wire, the q8w9wo ct0ixhxl0u,ce *k q1+strength of the magnowlkx e h t0i8x9 0qc,1q*cwu+etic field produced by that wire decreases to

  Two long parallel wires placed side-bp hz/61h7he*fk2yla c y-side on a horizontal table carry identical size *zelk71hy chh f/ a26pcurrents 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 the two wires

  Two long parallel wires placed side-byf e9ua.tkdo9vc; a .j;-side on a horizontal table carry identical current ; .vuc.ea;kot j99da fstraight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal cuq + r 93j qmziw7/v(k7czbjw(nrrents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between jq9wcj7 +nqkr7b w/izz m(3v(the two wires?

  A long straight wire carries current toward the east. A proton ;hdo ph yy5,u;moves toward the east alongside and just south of the wiro5y;h hu;py, de. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bottob9-fo2s e-kf/ng5 dtvm of the page. What is the direction of the magnetic force it produces on an electron that isf dk-gvo-2 b 5/9etsnf moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-bg:8 *6qzm;i dqlzk 8tyh-sf c6y-side on a horizontal table. If the wir8fi* -yzqmg c qdks ;8h66:ltzes carry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If thg /o/hd 7nlf4te wires cg7h od4tl n//farry current in opposite directions,

  Consider two current-carrying circuopct82 9n5rwo5 ys 4(y8g j:f- +cwxhh*jmdwglar 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 the magnetic field at th nwo-gjdy(pgc5w8+ 5tf 4m8r2:jwhh*c ysx o9e center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both aretbqwyem(yv4b,2by ( :d 1g)ie made from one strand of wire and both carry the same c b4eq) ev2g:wb(1diym,b(tyy urrent, but one has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carryiv k l eecghf*qlq262x*(9;kyang loop occurs when the angle between the loop's magnetic moment and the magnetic field6*yg2x q*e9 flhe ;2k(vlckqa vector is

  When placed askew in a magnetic field, a current carryingiovm.j0lf40mg u i* j;-qxu y5 loop that is free to rotate in any diuoljxif-q0g4ju*mv50 ; m iy. rection will experience a torque until its magnetic moment vector

  What fundamental fact underlies the o /i0 pq4m5m1ouvi5odrperation of essentially all electric motors?4dm vi 0/ipqr15uo5 mo

  A circular wire loop le rharfbgg w 2)m,dp3d9x1 *.f.mq*cc ies in a horizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field pointrc*xf* da 3.9f. )geg1 hmq2mprw,bcd s 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 partic 3:w got(*ftf 5toqxg8lyz 6a9le of mass m and charge q is accelerated through a potential difference V and allowed to enter a magney:8l5* q9ax gfogwzt3(f6tottic 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 char 8rry 0aqejubur*7n49ged 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 lineuun7*rryjq8ra490 be. 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 carrying a current of 0.60 A is uhi4b8bis 0mdu0,w(doriented parallel to a uniform magnetic fied0s0b duii(wu,hbm4 8ld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of t97dkc9p p8lwjgaj : ;$30^{\circ}$ 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 straighxx vnd qc28j, .i(nsec)yb;r s7b d8c2t wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? Tdri jv ;dc(xebxsyq7b)8scn ,82.n2che 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 0.050 kg and is in a magnetic fieldt3n*4bz gea- 5kvu dg. of 0.10 T. What minimum current in the rod is n- a kne*bg.zd3v5tg u4eeded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T.y6xz )i b 4 egacxeb57hi/pq7, What is the magnitude of ahg 7qb) 67ii ,b/4e cpxx5zyethe 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 u)c a:.t.lfu,;dcfke 4) zz)p0dcku f$5.0 \times 10^4 \; m/s$ 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 speedz8/jf4lb . hiqnj 09:(yivawx 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 norw b2 8udt84cpoth 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 witqra,a cr88enyqnr w k3,)g f67h 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 of.+5 td ibpjwgig 7uja,ac uo4 9+.u-ld $8.0 \times 10^6 \; m/s$ 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 6s xmm-/- )j yf;ogbssof $3.0 \times 10^6 \; m/s$ 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 ckr; pk6dy 1m/A. What is the magnitude of the magnetic field at a distance of 0.ycd;16m rp/kk 15 m from the wire?

  A high power line carrying 1000 rvluu/,gk88.r t/wko A generates what magnetic field at the ground, 10 m a.uwro/ kkr8t8gvl/u ,way?

  How much current must flow fo/ewk*t .ps21ljvj4bf 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 wirmn+xoyx4hs33um;5 m y e carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to tuxy4m5s o3xy3m + mhn;he 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 opposite d* 2el oziact7+irections. They are separated by 40 cm. What is the magnetic field in the plane of i*et7co+la z 2the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20r v7,:o+jkfyh uf2vn4 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic fielv:, r2nu 4fh7jkyv +ofd midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directnh .g0a+rnkb*o/5te kx4 h;j tions. The wi ghhn *a+;e.otk /0ktn4j rxb5res 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 ca03 km82vxh9 zonogexvdo4p32rry 2.0 A in the same direction. They are parallel to the z-axis, and they pass thrk dmp2n42ov0x 3 9oevhx3 goz8ough 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 Ap xm6q dwj.:m e/l*z)h and 8.0 A in the opposite direction. The wires are separated q*:d m./h6wmpx lze)jby 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circzur k9;kk ong,32;bednr- t9ys m96iiular loop of wire of radius 4.9reg9z9b kyrt-;2kis ; o,nd nmk3u6i0 cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field i(x t;(x q;xyxo+ gadp,s produced at the center of the solenoid when a cu+(; pqx;y(,xo xgt adxrrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and,cmv3 gzn:fahn,0p :p 0y4(ppa:rgg h carries a current of 4.0 A. What strength of magnetic field (gpg0 hmhcv:fpygp,:: p4n,n ra03azwill it have at its center?

  How much current must pa-q1r) qcq b*ctss through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic t cq1b-qrc* q)field at the center?

  How many turns should a 10-cm long solenoid have if it i .r; 0kkyf(pvw:dqm8e s 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 68ge21, gtnwba-*v sqi .0 A if its dimen i1ge2g,w*nq8a-v s tbsions are 4.0 cm x 8.0 cm?

  A circular loop of wire ofy ef2s n.8vr/m0lw)nl radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What imvf2/.)lw es08ln ry ns the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crospnd /sekw7* q) j:q-vgs-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 magneti2u(qgz-;5thycez p 03b kssb/c field of 3.5 T. The loop has an arzu/btbs; -ekgs phz02c3y(q5ea 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 fiel06) kfmwcy803gn4rq1anhdk s d 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 parallel to the magned 0sahk3w)qmg1nf 084yr nkc6 tic field?

  A circular loop of wir8ha3m+d:q w kke of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whak +8a :kwdqm3ht is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of tcbi:. , cl*bdarea $0.25 \; m^{2}$ 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 (ciw0)dd,c5u-jmp -w 0si igy7 xharge 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 velocitq gm7 ecw( +runb.8auzwh8oxh6. 32k by $6.9 \times 10^6 \; m/s$ 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 p(8rp;lvx0 3i9esrhu1.0 kV and then moves into a magnetic field of 0.040 Tlrusvi(hx; 3 p rp9e08. What is the radius of the proton's resulting orbit?

  A proton is accelerated cx ses g*l.serzvep+u5 1y(0* from rest through 500 V. It enters a magnetic field of 0.30 T resszx1e sulcyg.e*0+ *p5v (oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a rx9zwqd 9lhj auf;i38 ( :ktr1e:ovvj3fd/c 3potential 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 undefle8i::3 jftf (crxvzvl3 ;1 9rqko9 dwa3 edu/hjcted?