If the north poles of two bar magnets are brought close to each1l(0no0 1dde kp 2mlll other, the magnets wi 1lnk00elp mold(ld1 2ll

  If the south pole of one bar magnet is brought near the north pole k,q:hoc 9z4i gpty6qid g: 9sxl3v.,o 1v zn2xof a second bar magnet, the two magnets o t , ,26cpqg:hosvinz q4x3kvxy9: id1.g9lzwill

  If a bar magnet is divided into two equal p9 .r y-, t u7nyxatmado/n(0ukieces,

  The Earth's geographic North Pole ;vk ul000ccbcis magnetically a

  The south pole of a 9q k,.qg6ok 3aj o4k1 sbzswz+magnet points toward the Earth's

  An electric current prod,f-,x zpnd .qla/7tvr uces

  Which of the following ahm oa kml(. )ly61)gxis correct?

  A vertical wire carries a current straight down. Tokjn bk;fk .x/+ the east of this wire, the magnetic fieldk bknx+fk /;.j points

  A horizontal wire carrjuel9 px9rs;3gew + /uies a current straight toward you. From your point of view, / 3ux+l er9euwp9gj;s the magnetic field caused by this current

  A current carrying loop of wire lies flat on a table 4qc/6w afdg)stop. 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 cu)as4 wd6fcqg /rrent, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table to n34dmgxqg;: cp. 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 cud x3g g4cnmq;:rrent, inside the loop? The magnetic field

  The SI unit of magnetic field9mkd24ks,ukm/ch ugg j(;; cy is the

  1 T is equivalent tofxe ;,7 j5txv (n(wekl 5hgcb7

  The direction of the forc 77rfoflbp0g(a:75ro dj*j qhe on a current-carrying wire in a magnetic field is described by whh af( 77b jr ogp70rofq:ldj5*ich of the following?

  The force on a current-carrying wire in a magnetic field is thfefhzd0ag263 f s9 k*de strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero wew oqev84. m9when

  A vertical wire carries a current straight up in a region whereuwtf w txx+64+ the magnetic field vector points due nor6+ft +xw4xwt uth. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. Fromw0pjr/tp zkrs *3p4e:7v 7szq this we can conclude /k4jrq30:z ptzpewp* 77srs vthat

  A charged particle moves with. suejg- x*k(n a constant speed through a region where a uniform magnetic field is present. If the magnetic field p(x. j*-nuekgsoints straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constanx: a+voj;p in0t magnetic field. The magnetic force on this particloji +p;nxa:v0e

  A charged particle is injected(pd / 4due6mij0ildm2o5et:q into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignori2 oie:6uj0p/d deqit5( lmd 4mng the particle's weight, the particle will

  A charged particle is observe( 6y7(:ih3reli *qwc48a v dbwqvij g5d traveling in a circular path in a uniform magnetic field. If the particle ha 6a37j5ieb:*rq l(idi8qcv gv(4hwywd been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path 9.w/aywk g*a 2detgb ;in a uniform magnetic field. If instead the particle carried a charge of +2e, the b/gwty.d kew9a; ag2* radius of the circular path would have been

  At a particular instant, andh bd,ys/u9gk6:lo g ; electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magk9,u:gy;dod/ g b hsl6netic force that acts on it is

  An electron has an initial velocity to s*z(ka ed f)w rm*t.b1the south but is observed to curve upward as the result of a magnetic field. The direction of the mar(fadzsw.eb1 *mt )* kgnetic field is

  An electron moving along the +x axis enters a region where sar g;zvd1h.t-;0w avthere is a uniform magnetic field in the +y direction. What is the direc ;0ha -z; dwvgtsrav1.tion 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 straighls1 dnzq b)xl1 ,4kcv,t current-carrying wire is

  At double the distance from a long co1ivt+i1pe ku q61q u8urrent-carrying wire, the strength of the magnetic field produced by that wire decreaiovqt1iu+8q1 u1 pe6 kses to

  Two long parallel wires placed side-by-side on a horizontal t3*4ipr xfkh3 vable carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away f 3v4pkf*3h rxirom 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 h2 m p0(,viknlvorizontal table carry identical current straight toward you. From yip nv,lvkm2( 0our point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currecf*dg*o/x+eh nts. The magnitude of the force between the ed+/ ogxh* *cfwires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A prohu zse;d82 n9s sq3lkd84x ox9ton moves toward the east alongside and just south of the wire. What is the direction of the force on the prxx 88 dz9u4qksn odehsl;s329oton?

  A wire lying in the plane of the page carries a current toward the bott,n ,k3-n 9vqh sgxmi*jom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendiculaihq gx* jv9n3-,smn,krly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are place pcxxj.+g;ckza h429f d side-by-side on a horizontal table. If the wires carry cup kg.cjf4c hz+xa ;92xrrent in the same direction,

  Two long parallel wiresjob 4d* xba-;k -i5ljm are placed side-by-side on a horizontal table. If the wires carry c 4ia-moj;* bbk j5xd-lurrent in opposite directions,

  Consider two current-carrying circular loops.*t*z f5evf2yfm )c dj z)rss2, 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 md frcm)ze,vyf s5 *sj 2fz)2t*agnetic field at the center of the larger loop is

  Consider two current-carrq+g81i 5u* ho:f 4woxha5ffb3u k45 kznvikp(ying circular loops. Both are made from one strand of wire and both carry the same curr4f w:* (5gib35uuk1xh8qnho f+z voakk5 f4ipent, 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 when qgu oc1o2d62sz1:yllr) a l9nthe angle between the loop's magnetic moment and thno29qulyo r l:l z) a1d12cs6ge magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that v ll ,il(s*2(c uzfpz 3dx(x-dis free to rotate in any direcx(fl p-z*uz2 isvxcld (l, (d3tion will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essen.ipraw+e(y+sks. a /p tially all electric motors+si pa/kprs+ .e w(.ya?

  A circular wire loop lies in a horizontal plane on a table: sqf87hpnznx 6)ji7oaj + hr/ and carries current in a counterclocn)7n p6x 8zshi7ahfor j+:jq/kwise 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 mqy-41s1uc f2sm rg ;sfass 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 for the mass of the particle in terms of B, q ;1c sgyq2f1-fssr4u m, V, and R.

  A velocity selector consists of a charged particle passing thiz64if 70fmj v4exe3 +kufb)j x6kzd7rough 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 fi4zfduezfx4xj3)f7 kb7ij6 mv i06+ ek elds. 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 oriented parallel qrx;ud:*.sj x 7x eha(to a uniform magnetic fi j(x 7q*ra.;:duxex sheld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 1n:bsb,b l 5zkmjpr74 m u:x6/g0 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 straight wire carrying 5.0 Ao 6h8p*bbhi7l when it is placed in a magnetic field of 0.0oi8*bb6l h 7hp20 T? The 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 magnetim yh6 y 0nht.:y);thrpc field of 0.10 T. What minimum current in the ro)h 6 rp mtn.hy;:t0yhyd 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 0.20 T. W19d:mjs,c ng pc;rusg5l8u 2lhat is the magnitude of the magnetic forj: su1ru,l cggc nms258p9;ld ce 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 dg e4gcdz45 *s1ret /rof $5.0 \times 10^4 \; m/s$ 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 spep))mzh (;xlyc; 6vqo wed 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 nor ro:( bkmnj./sc*e:kjth 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 sp,aoxtxc 8r -r.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 magnetic force of the electron.

  An electron moves with a sppv6kzx) ph8q4raywyty do0; y+ ;aq0* 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 of *fp2*ba6 0zabaa/i + aaen/mb $3.0 \times 10^6 \; m/s$ 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 wirn*we pj70yq ihmvb*;8 e carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.h*;jnb*mqwviy 7e 80p15 m from the wire?

  A high power line carrying 1000 v+j8 7; tsqyhtA generates what magnetic field at the ground, 10 m away?;t8stqy+v7 j h

  How much current must flow forz gx; ergh.d)tgn-0t1 $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.0 uwjuk sta(+3n 5/ g -ndakn*sc94d apf8p68fmA is the magnitude of the magnetic field due to the wire equal to kn98aftus j k p/ac+up5w-6f3 d d4s *angm8(nthe 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-+crcwi.h;e r. aokw2ps )v;o directions. They are separated by 40 cm. What is the magnetic field in th ow-r2k ;vasep.o+wicc.);h re 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 curreqkdf8v), mkmf w c/q1.tahc76 nts of 20 A and 5.0 A in opposite directions. The wires ar av8tkkwm6 )dfm1 /h7 ccqq.f,e separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directionb6l+le1s wwm7;6 besca k,v t*s. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wires the svba wsl mt;kl wc7,ee16s*6b+ame?

  Four long parallel wires each carry 2.0o5rxvuqkjy; -ttb r7oc 91 r)0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of sidc otu5 ;o0bvr7q r tx1)j-9yrke 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 s pdhbsln512l7r.ex(+y w tz7 carry currents of 5.0 A and 8.0 A in the opposite direction. The wires are sepa e1brl(+dzl 7 725sts.p nxhwyrated 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 looad/ u95at;xi t iz* gaut6k46hp of wire of radius 4.0 cm when a cur6 ua9tixzaki;d h*ug6ta/54 trent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field is 8kp*d,.ijk joproduced at the center of the solenoid when,d 8jpo*ijkk. a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A.9hcx9ul2goox k 0nhc3c/h. yw:(kf k( What strength of y /n xhcohk9 3w x9:k. l2oug(h(fck0cmagnetic field will it have at its center?

  How much current must pass through a 400 turn y j)uohhmq+)/,- 0fj 3okjfvc coil 4.0 cm long to generate a 1.0-T magnetic field at the kv ch/)oj)foq jfmy,hu3j-0+ center?

  How many turns should a 10-cm k1sa4(s+jck,ley gex77 ao z-long solenoid 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 loopq64h fgxl7 td bny)ar4pt7 .a+ub;c,u of 120 turns that carries 6.0 A if its dimens 4utu h 46afqda;, 7pncx. t7+lb)rbygions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radiuq7ev(ej 6+izzgz 34qzs 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whj +e7qz ziq3(gvzez46at is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of c66b4 x ehq cmfvps+/f)ross-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 field of * btczm2d1h,y 3.5 T. The loop y mzt*2 1,dchbhas 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 fy5uiq or2 7c +sip ,f; s7jit-io fky/vfn,)4oield of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop issou)yp-sfi7, vk /rf5o fnqtoy4 i7icij2+ ;, parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a un6a ( yn6.1 qbntq5hvyjiform magnetic field of 0.30 T. The ynq.n y 6v(1ta6 b5hjqcurrent 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 loop 6k-. 1 6a afap dk16ckduvoj3rof 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 (cha*r: jfdv5p,pgn(gu+ erge 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 velocitqv/u n0x;9a sm1 tumcc rt+:k 6qx:d3iy $6.9 \times 10^6 \; m/s$ 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 a mag72uns*ovb ak:i / .u-dqf,ttgnetic field of 0.040 T. What is the radius of tuqd,f .v7* ug-2bta/ nksiot:he proton's resulting orbit?

  A proton is accelerated from rest through 500 V.-m8y1 8b wumh( vik6umvw,l 0j It enters a magnetic field of 0.30 T ori8-b(v jl wu6k8immuh0wy, vm 1ented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accele)qha +z j/hdsq3c(e h)rated through a potential difference of 10 kV before entering a vel( )eqc+h)3dzs q/jha hocity 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?