If the north poles of two bar mav7 r-t2sc1fz/u *sb/vl0 jz dtgnets are brought close to each other, the magnets wudc/tst /-2z0sv *7vj blf1 rzill

  If the south pole of one bar magnet is brought near the north powfow7b)3o)0:kk qf3v8yinfk 2qwh )qle of a second bar magnet, the two magn: 3bhw)fq o))8k2vkw on wq0iq 7kf3yfets will

  If a bar magnet is divided iny,qafusi:no+8hbq57pj2/ c y8u --hu7 xoyrb to two equal pieces,

  The Earth's geographic North Pole is magne ht:e2+eevzp gze l z(17s*:ietically a

  The south pole of a magnet points th v0k pju u93bkc3;awl7vwrl ,3,hyf2oward the Earth's

  An electric current producztf*hpvy):j 4b p),tz es

  Which of the following is correctm ydv nr1:v-axw1/9pt?

  A vertical wire carries a current straight down. To thi8 cqpa 04ob4 c49 xgb0cv2nwse east of this wire, the magnetic fi 0abc 9gpn440cco42bw qv8sx ield points

  A horizontal wire carries a current straight toward you. From your poicth 0uq3m+ly/nt of view, the magnetic field caused by this currenty/m+0tqu3c l h

  A current carrying loop of wire lies flat on a table top. When viewe- ss .kw; edunf-1hv+md from above, the current moves arou+;e-ws v ud.f1k -nmhsnd the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circu2ew.jrw *sy ;clar 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 t2s;yr.* wcwje his current, inside the loop? The magnetic field

  The SI unit of magnetic field is1 khys4lck70v the

  1 T is equivalent to *(k-dg *(w rsdrued -b+:tokb

  The direction of the 5gy cstv vr9; /xpqq/p: dy3nd(x +/wnforce on a current-carrying wire in a magnetic field is described by whi9 yq+pyr /d qsvv/ c:p(ngx/;5xdwt3nch of the following?

  The force on a current-carrying wire in a magnetic field is the stronge0ep*ape a+zg,st when

  The force on a current-carrying wom 7zts2v3p2+dc jbd 4ire in a magnetic field is equal to zero when

  A vertical wire carries a current stra 5e-clac*xk /( avma iwwn0p im6b3f6.ight up in a region where the magnetic field vector points due north. v5xk3e-. aap/mm b(icn * wa06fwil6c What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic forz274k,vatd 4r cun l:ace. From this we can concludenv t:alzu 7a44,rk 2dc that

  A charged particle moves with a constant speed through a region4r )-o.1whkax wcf jn41uus8 s where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle u )wnw41 okur.ss1j4 xh f8-acwill be maximum when the particle moves

  A charged particle mo9hvv et1/j,f csrw :9fves across a constant magnetic field. The magnetic force on this pa:f9v j9etr 1wc svh,/frticle

  A charged particle is injected into a uniform magnetic field such that it)tc v-lkj0+o dczz5cbs t+h)0s velocity vector is perpendicular to the magnetic field vector. I0z-v tbdt l) sc)+cch0k5+ ojzgnoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uni.cx(h1y1* usb xgrwn8-tqa pol8-lc+form magnetic field. If the particle had b(nqy-g+p xa1sh.bxr 8t c c 1l8uwlo-*een traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circula *56q g5qhnykhr path in a uniform magnetic field. If instead the particle carrieg6hny kq *h5q5d a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron 5oq7i hlmex8 ;moves eastward at speed V in a uniform magnetic field that is dir7q;lm5ixoh 8eected straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwf3b2 e4j n)2(kqh*rxaikmw .iard as the result of a magnetic field. The direction of the ma kf. kbaimj)q4 n i*322xwer(hgnetic field is

  An electron moving alop.,3ydtik g/w+c 7c0.atgb a6 nahwx) ng the +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z out of .pg,d k6yt 3hctg wx.nb+c/)awa07a ithe page.)

  The magnetic field proxtp/ ;-8h .kysizsirt26; ok/tqkrj- ;dqx u8duced by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength oh pc:i 9zyt0o9.i- yf*pdam-r f the magnetic field produced by that wii zhoprmfy9 9- cd0*-:t.iapyre decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry ide78ct jqhxa( xytexx-q:9 5)o rntical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away from you. From 5) xhc(jxyq-7t:xoxtera9 q8your 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 horim.+v83xe m ;xn wk6nky. faor4zontal table carry identical current straight toward you. From your point of view, the magnetic field at the point+x.4k.aer n mxw v63;8foykn m exactly between the two wires

  Two long parallel wires f 3j7rovhi6t m6:wx8ua3 sn-rcarry equal currents. The magnitude of the force between the wires is Fm 7tfo:w3ru vsn6ir -ah 8xj63. 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 proton moves kgjo 1zb:na2wp9c4+xe c /6getoward the east alongside and just south of the wire. Wa egpzb wj c:/kcx12e4g9+on6hat is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the botto,zuh:5ad (o0 xrugi4 rpt y(1om 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 youz1d4 r((:0,yh ipu gt5oaxrour right?

  Two long parallel wires are placed side-by-side on a horizontal table. If thh,9,z opjhu+ ne wires carrnz,+po h ,9uhjy current in the same direction,

  Two long parallel wires are placed side-by-side on a 5quy:+2wk c)9wu zzri horizontal table. If the wires carryk):+9 qu w 2curzy5wzi current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one1s5 sk 143xucemmr pq. 1dx-yw strand of wire and both carry the same current, but one has twice the radius of the other. Compared c51sk31 xy .pueq1 sdmx -wmr4to 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.w di6ejtuvs3/e)p*k uld-t /uux86y , 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 moment of the smaller loop, the magnetic moment x-)*e uk6 8/6ipsu tjd/dutylw 3evu,of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle between the j2yj(wuzj9r8 9n8 hgg loop's magnetic moment and the magnetic field 9 rg88z juy(njgh9w 2jvector is

  When placed askew in a magnetic field,, - 9maa:3oygypy iep, a current carrying loop that is free to rotate in any direction will experience a torque until itie:ym- a,oy9pgpay, 3 s magnetic moment vector

  What fundamental fact underli u gm7s5no+ a*oi3kl/ges the operation of essentially all electric motors?* 7mnu+3a lso gi5g/ko

  A circular wire loop lies in a h7 i: 8ykn yi9w4liccor+9z cz3orizontal plane on a table and carries current in a counterclockwise 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 lkiiwy c98 :nzir+479 cc3oyz 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 alv.c c8rgl+r4 nd charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, wh. r l8v4+crlgcere 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 charged particle passing through c57ew9m h-)u3-gm oofy;wt wdarossed 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, disru;w5mm-t3oyf w )ge 7o9a dw-hegard 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 oriented parallel to a uniform mryjz 6w1kl(oq4yi 6x,lc) xifh:53e eagnet3ol6,(:yi5rekexixlq h )1y6 cwf4zj ic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dire. 1bzbx:m )briction 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 Afb i*jvsot3(-alc 1+b when it is placed in a magnetic field of 0.020 T? The wlfbi3bjs1 *to ac(+- vire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has ak c)q,k 8dgnrcjnm4tm8 -2*gl 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 weign8cq*glmnckt8,2- )m4rdkg jht of the rod?

  A stationary proton is in a uniform magnetic avozbn898m ln7pph( k. c..rmfield of 0.20 T. What is the magnitude of the makl8n. 8rpnm.h79m(bzcpo. vagnetic 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 spe: v: wlquc43cied 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 spu -8df8c-tj. /uqbrgpeed 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 withy(yml dn 7bcpc x/;i;/ 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 - 9y50cegp k pc9ozu blmi:m,1of $8.0 \times 10^6 \; m/s$ 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 withntyog,k,nzo,u+e1z7ot8 gt ) 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 acceleration of the electron.

  A proton has a speed osahm3ne)( hyjq)*e 0snp8h, r f $3.0 \times 10^6 \; m/s$ 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 magnitude of9ka0(kdd lsm ;*skcd) he6v:k the magnetic field at a distance oc9*6: )kde kvam lkdsshk;d0 (f 0.15 m from the wire?

  A high power line carrying 100nnkt q o+s(vf q-(y2grm;np)(0 A generates what magnetic field at the ground, 10 mt( ys2 +qpn mg-nkqn)r(fv;o( away?

  How much current must flow for t9sxp)iue )q 0+lxs)n.1wntd$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carryin tpn,szx4h 6nw o/gxzi9al.,8g a current of 5.0 A is the magnitude of the magnetic field due to the wire eq 4gnx,zt .ho/,wsz8xp69ali n ual 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 xjox k1( db*k5in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the xxb5dkkj*(1 owires 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 opposite direc8ooco vop rpqr1 v:b8,-;i 2iftions. The wires are separated by 0.20 m. What is the magnetic fiel;bqc8o8 vip , f1rpoor v2o-i:d midway between the two wires?

  Two long parallel wires caru-rj8jy*cwakf t*+ 8 m5tl.iyq) i 0upry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contribj i*jqtm*uc50.r-l ft)aki+u88 y ywputions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. Thevnx*xj3c 7 +iry are parallel to the z-axis, and they pass through the corners of a square of +ji*xx37r cv nside 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 current,:vx*( vz6vihrqw w.w s of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find txv (wwr,v:q. v *wzi6hhe magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular l1d .8wfto.4- na27wnchwk jdfoop of wire of radius 4.0 cm when a current of 2.0 A ff2d cwd h7.1-o j4.kwtnw an8flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field isu3ry myb0dr9tpb / .1; wklho* produced at the center of the solenoid when a current of 10 A flow bdo;9m*l/r1y3wkty0h pub.rs?

  A solenoid with 500 turns is 0.10 m long and cm 2br3g9:f6caefokh7arries a current of 4.0 A. What strength of magnetib9 h6c37 ef2r a:komgfc field will it have at its center?

  How much current must pas2u-icm8qo if kia5j a25v xj y9cqbq3toq:8+8 s through a 400 turn coil 4.0 cm long to generate a 1.0-T m xm 8 9f+b2a2j3: tckv-5oioiqqq jia uc8q5y8agnetic field at the center?

  How many turns should a 10-cm long *pghc.ad(y, lz+s. t osolenoid 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 v-2e 2cydwk ,)kj8mi*q ys7n qa rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0dc-ijeq )v2y2q,ms87w n*ykk cm x 8.0 cm?

  A circular loop of wire of radiuic( a svyjv,sm4g: 6k)s 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 whenj6g m, kc)sya v(4iv:s the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-neg3 ulqwo9 dr-07si0sectional 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 3.5 T.fjm-l(7-me, 1xrfcj6 ixjf .n The loop has an area o fen(,c m7fr xljjm.jx6-i- 1ff $0.12 \; m^{2}$ 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 avum 0subdjo 95;y r7dx:qhsn3e,/go2 uniform magnetic field of 0.30 T. Thu20;rnxsgo, ds:mqe5yhj9 vu37 b/d oe 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 wire of radius 0.50 m is in a uniform magnetic field tk7 0ov5zyk*u of 0.30 T. The current in the looyk0 *uvt7zko5p is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loopb8 lt4vmj8frqxb1k5 e p7y 6mmw,1mk2 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 si8l+k: t rdv:5c fmhm.engle-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 wj gq(1 oin38gbith 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 3mus(* lulq (aoe1r5g+cd uo5moves into a magnetic field of 0.040 T. What isuc5(m qgeu +*oos(d51lur3la the radius of the proton's resulting orbit?

  A proton is accelerated f3aq.:sj :7vyws;hh1 m b4l4 n lh9(jjpy3hx mkrom rest through 500 V. It enters a magnetic field of 0.30hsqw4j ply h9m34ay(s j13nljmh:k7.h xv;:b T oriented perpendicular 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 kVpx up z3ivy .+l)f-t8f before entering a velocity selector. If the B-field of the velocity selector has a y-p+u zi v.pf3t8fxl)value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?