If the north poles of two bar magnets are brought close tqb2 68 u-dqs1c7 y f4qp+yvhswo each other, the magnets +bq4w uphd2f8 qs-1ysq6yv7c will

  If the south pole of one bar magnet is brought near the north 1uvftcp+ga8tf7 9*wn fc*h l3 pole of a second bar magn*wclc9pv 8a nu3* +f71thffgtet, the two magnets will

  If a bar magnet is d e3v ;pohte(tn.oeo::q si2q m1z1im+ivided into two equal pieces,

  The Earth's geographic North Pole is magnetically4b3b;air+ tik a

  The south pole of a magnet points towarw(8h e)7sgq8zs 8ztwhd the Earth's

  An electric current prjs9p ti 22dbc+x, k5xroduces

  Which of the following i9yl xli-pecia9 /c2*sv;c du,s correct?

  A vertical wire carries a current straight down. To the east of this wi cy :)nq56zykpre, the magnetic fie6 5p)ynqyzkc: ld points

  A horizontal wire carries a current straight)dlpm0 zfbyuln *kf/xo( x;3 (:-xict toward you. From your point of view, the magnetic field caused by this ctcxibdmxf yxnz:(p -/ 3l0 (luf)*ok;urrent

  A current carrying loop of wire lies flat on a table top. When viewed : bhwi9nqf+ xuajegu, 86(l4 o5uo7bo from above, the current moves around the loop in a counte8hwb:uao+,6n(ogubl7e i 59 jxqu4forclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a ty vv 9fyf03:gw-nf2ii able top. When viewed from above, the current moves around the y2v0i y wnv-iff9gf:3 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 magnet yrcs*v.gz9 t2ic field is the

  1 T is equivalent tohz0 kzfm*ak 8-qbb+d8

  The direction of the force on a current-carrying wire in a magnetic field islsbs jyb2)-b0.il 4g y zoi4v3 described by which of the followin bi4l4l 3ojy)2 bi.svsg-z b0yg?

  The force on a current-carrying wire in a magnetic field is the st+m0gbky 02 lhirongest when

  The force on a current-carrying wire in a magnetic field is equal to1do2 efs/ .wbf.7gucr zero when

  A vertical wire carries a current straight up in a regioz+kwvs2sh67ns ab :j )n where the magnetic fiel7svjs6 :k +zbs h)a2nwd vector points due north. What is the direction of the resulting force on this current?

  A charged particle m n urdx9c70/0k rpu(i s-g-)og+rtb wcoves and experiences no magnetic force. From this we can conclude tr0uo)g7t9d-gu-/r0 +r cnb sxkpw(i chat

  A charged particle moves with a constant speed through a region where a unifor/, (;ded ozl n2chxi2qm magnetic field is present. If 2,2dqz idn;oec/xhl(the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magt:qo yd.*l 1uhnetic field. The magnetic force on this parh:l ot .1qdyu*ticle

  A charged particle is injected into a uniform magnetic field such that its vm;u f(t*hus5m(1tura elocity vectortrus1 tm*5 (uamh(;uf is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a o23qn h84dhjfcircular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circul n2dhh8f 3oq4jar path would be

  A particle carrying a charge or ( 9kzsz79oo7.h(jmy79ktw fufjn) zf +e travels in a circular path in a uniform magnetic field. If instead the particle carri)7or9f(9sywzju k f 7on.mz j t(h97zked a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastt:i 3dah k:.nnward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that 3nh i atkd.n::acts on it is

  An electron has an initial velocity to the sout w+;y5hah1p1mtzubb 1qozk4*h but is observed to curve upward as the result of a magnetic field. The direction of the magwmz*5 1zuhp+b yto ;bq kah114netic field is

  An electron moving along the +xmu2zzy5jq2ua(ac m6f -5 )ncwudreqv9 3u0r: axis enters a region where there is a uniform magnetic field in the +y directiq9:53f qnwam cuvumzrr5 caz- u6 (d0 2yu)2ejon. 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 produced by a long strk sy0 vh0-fh. puou.-yaight current-carrying wire is

  At double the distance from a long current-carryish mz+p4vbcm:+y:yc5t13 iem ng wire, the strength of the magnetic field produced bycsm+ p by+m:cv mht35 1i4eyz: that wire decreases to

  Two long parallel wires placed side te tn+lq7d,cw4cv c,6-by-side on a horizontal table carry identical size current,cl tw4ec nt,c+d7 6vqs 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-by-side on a horizontal table carry identih, ): e)(ypnk*fnrwqccal current straight toward you. From k(:q )encr*w, pfynh)your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of wdeimz(rnv72; (m n5jthe force between the wires is F. The curre ev5j;zdr(wm (7imnn2 nt in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire cl ag s0o9uf4,2 grfx9iarries current toward the east. A proton moves toward the east alongside and just south of the wire. What 0 xo29sif9lgf u,g4rais the direction of the force on the proton?

  A wire lying in the plane of the page carries a currentby*fcoa9 ;e):wk7jop,u5b kzbcz1 c 2 toward the bottom of the page. What is the direction of the magnetic force it p booaec9w2p f:b71*); ,zkbycc5jzukroduces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires txq+n dd4 h0.jare placed side-by-side on a horizontal table. If the wires carqj.4 nhddt0 +xry current in the same direction,

  Two long parallel wires are placed side-by-side on a hori,q. ughov.2h gzontal table. If the wire uvh.,hgq2o.g s carry current in opposite directions,

  Consider two current-carrying circugu *oxkhem co1/,0n*qlar 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 the center of the smaller loop, the magnetic field at the * e,01 x/khmou*q ocgncenter of the larger loop is

  Consider two current-carrying circular loops. Both are made from oit1id8 y26ejah 43s bbne strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the mbia h8234d 6i1jy bsetagnetic moment of the larger loop is

  The maximum torque on a curren8 gf3 jry10o faij2+tnt carrying loop occurs when the angle between the loop's magnetic moment and the magnetic fieldg28fafj 0t nr+yi j31o vector is

  When placed askew in a magnetic fieldoh dl6xr(-3hky.i6,4ko eb e-gf6 vpw , a current carrying loop that is free to rotate in any di3v pkk(g6w 4-6-,e6xribf lh.dheo y orection will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentialp:b-gkfm;hn m*: swx6 ly all electric motors?b6w: gsmmf-*xk:pnh ;

  A circular wire loop lies in a horizontal pla s,1out(06 l4qoyrzwh ne on a table and carries current in a counterclockwise direction when viewed from above. At this poohr wy (l4otqz ,s16u0int, 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 particy.(tvd;a jb,druhe)) le of mass 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. Derive an expression foa) ) d,;dtv(e u.jrbyhr the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particlejjv pog3vb7tlncy-b:- 5,- j/cgru f( passing through crossed electric and magnetic f gv-rv,o/b(jtju3f : p-5cynl-b7g cjields. 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 directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60;.31uyunniuse 9 tn 7j A is oriented parallel to a uniform magneti ;e7y1t.3unnu in9ujs c field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction z-sb( y 1fbbgs 9/xh0tof $30^{\circ}$ 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 str5drgs*j i65dpb c2m (vaight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? Tprgcbd65( j5*ms 2vidhe wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mamzg2.8bu. . m nfpme-bss 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 canf 8nz.mbm p ue.mg2b.-cel the weight of the rod?

  A stationary proton is in a ihpq7pmk 2 6zz t:*8kjuniform magnetic field of 0.20 T. What is the magnitude of the magnetic force o2*p8m 6qi pkt:7 hzkzjn 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 ofz,x0m *u w70slrno( qi $5.0 \times 10^4 \; m/s$ 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 speed1xf yjg-0w zu- p.t mod2a-:jo 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 no+xz7k 2ups:g4s4j 7aivp otprz* 9p8 lrth 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 qr0cwc0,cu u 1utruvfu-x u9 *qwl :0-$8.0 \times 10^6 \; m/s$ 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 spe gc29;qj+9 ygoud:j7xzy -ojntr b07e ed 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 lh cyxgpho++:5/nozera; 9w7$3.0 \times 10^6 \; m/s$ 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 the mago47xm .bh8m ugnitude of the magnetic field at a distance of 0.15 m from thhoum bg4.xm7 8e wire?

  A high power line carrying 1000 A (ycm// ww y/zbczr63p generates what magnetic field at the ground, 10 m awab /cp(zyw 3/ry6wc/zm y?

  How much current must fbcc +v1jo 1fy3low 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 curred er a0( r9j)p2)grwadnt of 5.0 A is the magnitude of the magnetic field duee)g(rpd0ard)j9a wr2 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 opposite direction n8w o9ag -z4pqol3h+ts. They are separated byqhw39p + 4azt-n 8gloo 40 cm. What 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 carry currents of 20 A and 5.0 A in opposit3y at/ kvchi7(e directions. The wires are separated by 0./( atcvk i7h3y20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 50 qw *ni7iy,0hcwl-.qwd d1ypxj 1 -zl.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions fr,j .-xcy*0lzwlqq 70i 1hyw1d-piwdn om the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are parajdkn uda0 k,xx8 5wih-cb. x5:llel to the z-axis, and they pass, aiu5bdhkd ckx 8: .x-n05xjw 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 the opp qz)ze,c/(zw posite direction. The wires are separated by 0.30 m. Find the magnetic force per unit lenwz (eqz,)z cp/gth between the two wires.

  What is the magnetic field at the center of a circular loop om.ih / iow1/eoz5 eg:fo w9dz0f wire of radius 4.0 cm when a curre i1gho ./9ew5zf/ e0o:oiwzd mnt of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 0*/tnlkvd(g jturns of wire. What magnetic field is produced at the center of the solenoid when a current of j (*d0 lgntv/k10 A flows?

  A solenoid with 500 turns is 0.10 m l pxs :qbg y 1bu0.y010oc7alajong and carries a current of 4.0 A. What strength of magnetic field willq0bj1a0ox . bg7:1 u0 spcyayl it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to geny *yd+me(c3 oterate a 1.0-T magnetic field atedtm*3 o+y(cy the center?

  How many turns should a 10-cm long solenoid have if it is to generau6u+lv8p50 geqda4flb h d, ;ote a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic momqb) ;hzm:8*gf2 nxolgent of a rectangular loop of 120 turns that carries 6.0 ;hg8lfmbqn )2z x *g:oA if its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field ofl0b7 0lyh6nuv lcm: e6 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpeen:7 lh6bvcy ul0 0lm6ndicular to the magnetic field?

  A circular loop of wire of cross-sectionalil .7/mki +nksrg7 ag+c)e n2i 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 0l4j1a7 5;xl)gum6hi zsh a qia current of 2.0 A is in a magnetic field of 3.5 T. The loopil7 ijzq ax hm5u);0s 1ga46lh 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 rad )a7 juq,g *p5ao3ditxius 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 5x ia*)tga3o7,dqju pplane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 kvs2 fzmf-1 y5T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of f v2k5 z1fs-mythe loop is parallel to the magnetic field?

  A circular wire loop6ic 4qnvpr7 6i 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,6vt6-/shzi /jt7 lb sx a single-charged particle (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 wi+4 dg/c yyr 1bl4d,tywth 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 moves into q) m laib(tw7cy81-s;lki q a-a magnetic field of 0.040 T. What is the radius labc8k1lst; -(y-)qi qi mwa7of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It ldql+xzew ; z08x4af+ enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. De l84 f0+l+dxw zqe;azxtermine the radius of the path it follows.

  A beam of electrons i c(3k 2qes;zpdncm1q74nc y.xs accelerated through a potential difference of 10 kV before entering a velocity s yq .x e;np2zdc1k nc73(mqc4selector. 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?