If the north poles of two bar mg7mi;nq .kj: sagnets are brought close to each other, the magnets wilni7 ms;jkq:. gl

  If the south pole of one bar magnet is brought near the north pol)wk zhbmt7md;8d6ixlj9l7+z p 7z ii;e of a second bar m7mi )wll7jzkihi ;x ;z+b7d6z9tmp 8d agnet, the two magnets will

  If a bar magnet is divided into two equal pieceszi1 5 t**xqom(yy /yts,

  The Earth's geographic North Pole is magneti4d8q7:-fjxnjl7;r zz k 9 hhgacally a

  The south pole of a magne)-h2 cnz:; vaf-skar j6djx2ht points toward the Earth's

  An electric current prknj hn8ers n/w ,wb040oduces

  Which of the following ihng lo7b1y1 rp+ +txpm)t(g8yfj)3u e s correct?

  A vertical wire carries a current straight down. To the east of thfaa6 ;v 6zcu ;h0eq.n/2povjbis wire, the magnetic field pointszv ;0h/;q po6avfebc.2n6 aju

  A horizontal wire carries a cur8,cudu-hxvo y8e l20k7mdf:t rent straight toward you. From your point of view,u2omdhv8l c7d,:-e t8 u0yfx k the magnetic field caused by this current

  A current carrying loop o 4hrtr p )cz+*/f(wqdaf wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise s*qp/fadcw+hr4 r )z t(ense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circula2e(lrs )y:wuj qf+,1ib c -rga 1xumu+r loop of wire lies 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, inside the loop? The magne,r mw)urqx cif +1 a12+-ebju(uyslg :tic field

  The SI unit of magnetic fielnk hmau ox7:w dhxi292i/3 .gqd is the

  1 T is equivalent to q( y(i:egzc0d.ij5cr

  The direction of the fohwcij3)d/2dl b,rf wa zd 0d6 e+swch/,2car5 rce on a current-carrying wire in a magnetic field is described by which of the c a ds3zj5lcw6 +0cdew2rwrhbddh2a i,,/ /f)following?

  The force on a current-carrying wire in a magnetic field is the stjhmou/-c) f1p rongest when

  The force on a current-carrying wire in a 3e4dah 8yw z2t.bqgvxqc, z/; magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the4a:7x+gcco d .lpxv,l 9*gtlz magnetic field vector points due north. What is4*xg c9xa:z+c.povtdl ,g 7ll the direction of the resulting force on this current?

  A charged particle move.gmg*:noq:se+x r*o)gmdn7gg uft70s and experiences no magnetic force. From this we can conclude*m7g. se * ruogm dt+x:og:g7gqnn f)0 that

  A charged particle moves with a constant speed through a regi fxherjzp of4/ e*49.ron where a uniform magnetic field is present. If the magnetic field points straight upward, thefrf ep.ejo4rx9 /h*z4 magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magne:y/oz )nqbxv,z tkp95*l b )adtic field. The magnetic force on )op)t9ba ,:yzv*lx dqzkn 5b/ this particle

  A charged particle is injected into a ,q/4xg(iaanz uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, thixa 4a(n, q/gze particle will

  A charged particle is2uuww9r:is hho, 29 vw observed traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path wowshw2:2wri,vu9 h9u ould be

  A particle carrying a charge of +e travels im 8lg- 2hubh2 t7csqo;/yw phd9j-dr6n a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path wouldy7mcj; 9 -hdhploq/h6s -2 2gur8tbwd have been

  At a particular instant, an electron movesr c-cwymcy9 5p86t 6(1 gncwzpacz k,6 eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic forca rpy(m6cc6kyzpz cw1n9ct - g6w,8c5e that acts on it is

  An electron has an initial vv9lbqar(fo27 i ibm13 elocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic firbi1lo9bmqai v 327 (feld is

  An electron moving along the +x axis enters a regioxj3xzv*jy:r/+wafd ;4hk x; wz) sd(nn where there is a uniform magnetic zy 4fxsd *wj)jxx(3ar;h/wz :v+; kn dfield in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field producedcb-lo)*4ysz b+fa xt) by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of the-f -ua*e8 tk,p1f wico magnetic field produced by tc,ewfa 81ki-* pt ofu-hat wire decreases to

  Two long parallel wires placed side-by-side on a horizont u( r+dgrd y4fyee,.s(al table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left cfudd( s4ye r(y,+re.garries 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 s+zghl: 6p 1gyr pwi+7-/lfmg dide-by-side on a horizontal table carry identical current straight toward you. F-1+w g/ifhgzlrmgdp :l 6+ p7yrom your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The .hob w ecsg( 4iab:a53magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force betweenco(swa ah3iebb:54 . g the two wires?

  A long straight wire carries current toward the eas ;m lk2.w jusktq 7m05c/mbev(t. A proton moves toward the east km u bw0es vm2m(kc5t/7. q;ljalongside 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 a current toward the bottom of themntf+se.-lfdy 4+cb3e m da +. page. Wmy. e- +eb34a+f ntmd.c+sdflhat 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 right?

  Two long parallel wires are placed side-by-side on a hx 4w..gnpjiw7 orizontal table. If the wijpw .xi .gw4n7res carry current in the same direction,

  Two long parallel wires are placed side-by-side on aor )rnq4b uj/y,wy*46ls0xmw yz 60cm horizontal table. If the wires carxzq m60 b6 wcln/)urw4r,y yj os*04myry current in opposite directions,

  Consider two current-carrying circular locvw( z2zzkpw0a+ -av+ops. Both are made from one strand of wire +(2 acvzvp-a +zwzk0wand 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 of the larger loop is

  Consider two current-carrying circular loops. Both are made from one strav0dl6n :mpf5qnd of wire and both car m0:6lvp5qf dnry 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 larger loop is

  The maximum torque on a current carrying loop occurs whenk u3rpbgq s-no-r.3) o7g5s xr the angle between the loop's magnetic momeb k5xspn g--3g3o7rrso).qur nt and the magnetic field vector is

  When placed askew in a magnetic field, a curre7s0vsja-qld 2) vuh vo2+xq)ynt carrying loop that is free to rotate in any direction)u7j2qxqyo a 0hsvldv2sv -+) will experience a torque until its magnetic moment vector

  What fundamental fact underlies the av/og-9z 0l/ tkj6 jxwoperation of essentially all electric motors?vj/9 /0kxlj6gzow a t-

  A circular wire loop lies in a horizontal plane odu-v5 fgz nq*0n a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the nor-gu0vzf*d qn5th 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 thfx/rg/ a1l pst+z- -mwrough a potential differenc r1/ wtxzgs +fm/p--lae 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 o 8auij(w huu*2j)t4v gf 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 velocity selector, the particles move toward the east, and the magnetic field is directijvau gw 4*2h8 u()tjued to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a ufm9qao 5z11 puca+se) niform magnetic fieac 1ze+f 1uq5)o9pmsa ld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current.g rtr v8l-z o,hoc2or:sa27q of 10 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 straigi::;uxlaw x)u9 p 4jphht wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wirew u9luax ;:ix:p4 )jph makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a o5-i brj0fg+k zc07ub1i;eqm mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weigekb; +uimz i-7 fjqgb01rco 05ht of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the magni 9a17:wsmlhc)/i of j5qj,qmp tude of the magnetic force on the 7 qmwih/)cmq s,p51aofjl:9jproton?

  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/2 vfz1jh5 g (t7tayh4q flfr+ $5.0 \times 10^4 \; m/s$ 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 47,u:3-m f vgdcz snlq)n :ddy2x3to oof $5.0 \times 10^7 \; m/s$ 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 norsgr ku8ne2 qbcn3z;y/* gkl9 1th 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 speet0k 8/u wi3uqmd 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 sptveyup bwh q;1p( c8,(eed 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 e4wq tzx:t7o9of $3.0 \times 10^6 \; m/s$ 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.j3gab be5g84bjl 6 c l52hir3w What is the magnitude of the magnetic field at a dlrewhja55ggbb8c3j 6i32 4l bistance of 0.15 m from the wire?

  A high power line carrying 1000 A generp5ib d6p (bgto qg8hbn zj-207ates what magnetic field at the ground, 1bgzn68(b p 520do jit gqpb-h70 m away?

  How much current must/-;u d8nadgxy8w vcfu hr29n9 flow 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 a c15reoy t a5* isbjpb iey147p+urrent of 5.0 A is the magnitude of the magnetic field duir+pby piej15bse7a * y14t5oe 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 currents of 10 A in opposi43yjv4j 9ce3o gzf8lus5vnp8 1uing2 te directions. They are separated by 40 cm. What is the magnetic field i95g nc8ys3 p4ujvf 23e84j inlz1vgoun 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 currents of 20 A and 5.0 A in+ztkz7 vw7 xi* opposite directions. The wires are separated by 0.20 m. What is the magnetic field midwayk+ *i zwxv77zt between the two wires?

  Two long parallel wires carry currenl itd)nzu5w3*ts of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between thezwd5*t) i3u nl two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They art rlkopn7s+;1 e parallel to the z-axis, and they pass through the corners of a squrn+;s7tl1kp oare 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 the oppost-sasjv*qoe l1yw5 2 .ite direction. The wires are separated by 0.30 m. y*-lqw sj2sv. o 5a1teFind the magnetic force per unit length between the two wires.

  What is the magnetic fielwqihv9-j:t/ze 3u ca8d at the center of a circular loop of wire of radius 4.0 cm when a cuwaq8-v:9 e uch/ztji3 rrent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. Whaa9bs6qqs/6y+ 1w u dqht magnetic field is produced at the center of the solenoid when a current of 10 A uw qd q/a166qss+by9 hflows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A.ec2,)lxqn oy 6 What strength of magnetic field will it have at its cenyn )x2oeq,c6l ter?

  How much current must pass through a 400 turn coil 4.0 cm long to gene wzsdfza9p//jb z.6 q0rate a 1.0-T magnetic fieza p0f9qj/ z6 wsdbz/.ld at the center?

  How many turns should a 10-cm long solenoid have if it is to generxgd)c;oq;l7 z iff zwyv :s:740sqb9a ate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loopy x kl:1 d:si9m)y d1z4vewil7 g3kh-j3jg/x r of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 cm?e 1kiillzx/)9 sj3-x4d m 3rjwygg dhky:1:v7

  A circular loop of wire of radius 0.50 m iqlh qw/-rh2 u 9czp7-xs in a uniform magnetic field of 0.30 T. The current in the loop isuqwlh hp -crqx92-/ z7 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of w.ty8 std0g ,du+g -zznire of 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 fiel:sy.jt:53ki f1frd qzd of 3.5 T. The loop has an arq3y:i zt5fkd1rf . :sjea 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 6bptzjbrv ;(u ;-te/tof 0.30 T;6tbtv-b;ez u(p rt /j. 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?

  A circular loop of wia/mle+9 s o5u8nx zx.ire 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 magnetic torque when the plane of the loop is parallel to thi.lz+ nxms ox5 e8ua/9e magnetic field?

  A circular wire loop of c 4nsu 6xssv eri0vy4bclv75+0 w +hf+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 partivlbl+2 8:kmqdz . ptu4cle (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 wa3g6yas7 sg9sith 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 kV and then mov25)tgmd na 3b1kmm66 u8irfples into a magnetic field of 0.040 T. What is the radius of the pmkmtm8r6i udgl2 nbf3a 5)16 proton's resulting orbit?

  A proton is accelerater27dcwe .qsxw44i1p d op,uq-d from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determinepu,pd7 -wd oxq1q.w4 er4cis2 the radius of the path it follows.

  A beam of electrons is accelerated through a potential diffr81:y(bzw6 kyd y ywp+erence 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 isy(+6 ww1ryydkz: y8pb required if the particles are to be undeflected?