If the north poles of two bar magnets are brought close to each othu h3 14oft8exrer, the magnets wx3f1o e 8ruth4ill

  If the south pole of one bar magnet is brought near the nortty jno.2mkb05 0oz d6wk3ax-jh pole of a second bar magnzj3k02kb-xj.nd t a0mwy oo65et, the two magnets will

  If a bar magnet is divided into twdopsb .p4 wi;:o equal pieces,

  The Earth's geographitb3p qi3p +n),wfszf: y8k j+vc North Pole is magnetically a

  The south pole of a ma .hhy 271ov5b 5zhydmggnet points toward the Earth's

  An electric current pro)c 7m.px 4 zub,xepx/*vtup+ nduces

  Which of the following is correct?u4ewdd4l 6b8dq 5dd 4j

  A vertical wire carries a current straight down. To o 1d*hh9he1y hthe east of this wire, the magnetic field poinoe1hy d h19h*hts

  A horizontal wire carries a current straight toward a1iyve 2.okmj a s(nzgf wm195 dpi0::you. From your point of view, the magnetic fieldifm i k w1p:1d2.moeans9yazg5(:0jv caused by this current

  A current carrying loop of wire lies flat on a table tgnfp 4 0s gk)dc50xrjzaw6bs;+xu:: t op. When viewed from above, the current moves aroun0bdcj) 4 twsu:g:n65xgfk 0r;+zasp xd 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 circular loop of wire lies flat on a table top. When vce65ivba44 d b3+ih xao)6eegiewed from above, the current moves around the l4 vad6+baeoexg c6e3 4)i5 hbioop 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*55prtun/zjz field is the

  1 T is equivalent to()qvjr**. yde js 9udd

  The direction of the force on a current-carrying wire inmvx( sdul/d39 a magnetic field is described by which of thevddmlx/( 9s3 u following?

  The force on a current-carrying wire in a magnetic field is the ;5g/ ycw*7zefj eyt:xstrongest when

  The force on a current-- jmm 4/ncapr*carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where ty0 ) wchlz/3 9a03d .dfru,fumeiz cb5he magnetic field vector points due north. What is the direction of the resulmzi yw3a30b) fzdfuul0/5e9 ccrdh.,ting force on this current?

  A charged particle moves and experiences no magnetic force. From this we ca* mbiytmoglk)y.a0 )x(d f/e2n co0o )fkemy2/i*. a(dgy xb t)lmnclude that

  A charged particle moves with a constant speed through a region where a uniforrx5 u5e.:vali7p/ rnw .lff:ym magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when t xrf enwvillf/y:p: 5u 7.r.5ahe particle moves

  A charged particle moves ac5d4 qdj7 7ci7hkk nw25,xdbhyross a constant magnetic field. The magnetic force on this partd2hqnc4k7,kbjh 7d 5d5y7xwi icle

  A charged particle is lnitl k-zdnvk14na z7v b;aqf 3g0q79 a-6. tbinjected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector 9-ib;zat1n-l .kt47avn6gknz7 vqla3fdq b 0. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform 9z+q t4o6/zj a;pobmumagnetic field. If zaojt6o+b /;uzqp 4m9the particle had 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 in am 2jis;-dnh7l uniform magnetic field. If instead the particle carried a charge of +2e, th mid;-7ls 2jhne radius of the circular path would have been

  At a particular instant, an electron movest zjpe d0):(+lgw(/c xfg)jikfz1u6fw1)stb eastward at speed V in a uniform magnetic field that is directed straight dzipktw ):+1 cx6fdfub(gf)0)jjles/1g w (z townward. The magnetic force that acts on it is

  An electron has an initial ;4.7:bf*zsq; 1xzqwkm nk koavelocity to the south but is observed to curve upward as tmb zxn1kqk;7z so:4fwk*a. ;qhe result of a magnetic field. The direction of the magnetic field is

  An electron moving along they47-tyd3uo. g 0;v( iooocxa b +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 the p ; toy0yg.4 o (c3dxoovibau7-age.)

  The magnetic field produced by a long straight cure,9p(wz7 l suxk7ygnr:z/ bz- rent-carrying wire is

  At double the distance from wqwfqny 5+ss8bcns9a ; .gk49 a long current-carrying wire, the strength of the magnetic field prkcgf5q n4 s +.bss;w99 yna8wqoduced by that wire decreases to

  Two long parallel wires placed 3 x1sspm6q5h9ep:kkabd c6 4xrt;t1y side-by-side on a horizontal table 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 from ybx1th4xkpdy:s6ks 6cep am r1 q;t53 9ou. 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 identi84o( g5bhjn aa m1b,dlcal current straight toward you. From your point of view, the magnetic field at the point exactly between the twb5j4(g o,an 1m 8hblado wires

  Two long parallel wires carry equal curreb+jlpzj/eody b)mccxp )n+ j4u (;b- /nts. The magnitude of the force between tu n-j+ebc/(j +x z4lcb/pmybd)pj o) ;he wires 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 proton moves 6.aa+4 2 ba*p x6thasxb:tqiq toward the east alongside and just south of the wire. What is the direction of th psibxat6*bx4a+:.aht q 2 6aqe force on the proton?

  A wire lying in the plane of thexn,8srqr n8p2;q u3veeyja.0 page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also ; y8j 8e0rsa.xv 2ue3,qpn rqnin the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a/h c/erot/z x. horizontal table. If the wirc/ etz/oxh/ r.es carry current in the same direction,

  Two long parallel wires artzp), zisj1ddw)o/ b;e placed side-by-side on a horizontal table. If the wires/1od,j t)i zbzp)dws ; carry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strand of- -gvhv r(r:tc9pnok * wire and both carry the same current, but one has twice the radius of the other. Compared to the mag*-tnh:(vr9rvk oc-gp netic 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 mad((wjxy)wy/hgry-u mwy 9(+th e 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 of the larj (y(hyh+w-g wurx/tyw 9y ()mger loop is

  The maximum torque on .s b/wwag( g*vwmz9o7 a current carrying loop occurs when the angle between the loopo.w9(s/gw *avmw 7z bg's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free f dast6nb*;8l / px:kczciq85to rotate in any direction will ex5 8s;6l*q pdftc/8:b a cxikznperience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric cifkr *pq1x1e;m v9: 6r* n1h avoku(zmotors?pz ivv;(f9qak1*6* 1ur k:n1m hce orx

  A circular wire loop lies in a horizontal plane on a table and cl/ q4pyzo s99mww e)c,arries 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 tmo /4)9qyw,9cws lpez he 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 az,(kvntg r0+r1hi ;.b;fgbdb ccelerated through a potential difference V and allowed to enter a magnetic field B, w1 b +;r;i.g( z0rhk,bfbdgvtnhere 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 througci,gzhz6hz e(;fv q2y9 50grb h crossed electric andqgizz; rz95c ( ybg,h evfh062 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 directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A7jn8+w z,qr )cdbeu7 u 5r9hwl is oriented parallel to a uniform magnetic f7)9 jhr 7uc+w,r w5nq8udblz eield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 ie16jmu3p0rn u 91ihb 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 A when it is4l7 pbu,n v+.f1wy njy placed in a magn4 wuv,.f+1ynb7 pnljyetic field of 0.020 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 fw25uam,(2ctukz)gd5bf yft 3n;m+ z a magnetic field of 0.10 T. What minimum current in the rozm;3u(yw+tkabn5 zu )2mf fdgcf ,5t2d 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. What is the maj0a,ba a7xu7kzk6 l mg,v* 0cqgnitude of the magnetic force on the qa7,acu z6xgvlj7 0m0kak *, bproton?

  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 m1m6dlp5 v23defm cx1 speed 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 speed8q(e g +r yuyq4fp7v4i 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 dy3fq : w)gpbkjhna-fv(7m4n:ue north 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 spee qdm- vsx4)kci z-q52yd 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 spe0 j91i.xkhv3 ,snqxf ,lc xr9qed 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 ofymb k1n p3g-a8 $3.0 \times 10^6 \; m/s$ 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 carriet oob)(y d oc;s4a3*ezs a current of 25 A. What is the magnitude of the magne)3 * 4tooc;za(obedystic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generatkpoa- -db/ *nmulej((e/ kd4oes what magnetic field at the ground, 10o*-nmkjad/l 4ke ob/ ed((p- u m away?

  How much current mus9m1jxu-i8d 1d vsed0 vt 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 currentt7 g /uh8i.mz-s(gww t of 5.0 A is the ma /g m-8w7t uzstgwh(.ignitude of the magnetic field due 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 directions. Tke(zr;/sj w14 -rj;nus)h rgehey are separated by 40 cm. What is the magnetic field in the plane of t g/j-rr nhku(s ;w1srz4j)ee;he 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 opposite dir*z2 gxqb2 wma u3buy4-ections. The wires are separated by 0.20 m. What is the magnetic field midway between thbmw y 2u-3 *2aqgu4bxze two wires?

  Two long parallel wires carry curr):1 9.yv ve:v lyrrlppents 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 contributions from the two wires the same?1r:vy.) llvver9p : py

  Four long parallel wires each carry 2.0 A in the same direction. They are par2yt ow0j (gt ;(tegf7wallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in t g;2 t0( 7eft(ywjgotwhe 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;argwq- jg5rab 6f:0 *uma,b:nn ud)v .0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force)fn-ujbw 0 gumr:g5,rb;: vaa6*na dq per unit length between the two wires.

  What is the magnetic field at the c-fa. .qd4m rwdenter of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flowsqddr4.wa- fm . in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. Whaekr -z8,x;i lzt magnetic field is produced at the center of the sixzler, kz-8;olenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long angty 4r q)t06gnd carries a current of 4.0 A. What strength of magtg0g 6)n4qt yrnetic field will it have at its center?

  How much current must pass through a 400 turn coilk:sv2 hp eg4 ;0;l7rbd a;kxvi 4.0 cm long to generate a 1.0-T ;p:g;i4kxld2 vk0e shvbr a 7;magnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to gen )2f ku1h5cqxierate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangulaof+e sw4po y.40b)).zn fsht mr loop of 120 turns that carries 6.0 A i).e.t n m44ossz)b 0fo+whypff its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius txhpp3wsa1 ,50.50 m is in a uniform magnetic field of 0.30 T. The current in tha5p pxhw s1t3,e loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-hl(+o.kh7tu :vagq, asectional 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.,ea-jjc5 cf ki7rmt1: The loop has an arec c,7j-fajk 5:1eirmta 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:,v o:(29:gse ei r-feynknvu of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of-:k n(g2,yiorfe us :9evvne: 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 0y(3nhe7 xf x.0oy :wfx.30 T. The current in the loop is 2.0 A. What is the magnetic torque whenfo(y3 xxe.w :n0y7xfh the plane of the loop is parallel to the magnetic field?

  A circular wire loopuh(u(ynbxq3g )u7o l :bf2 7oq 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 sin*b ntvnj 9cy8-yego 5:gle-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 with veloci,dm1fa/7bsx ktw,3z fs,g0 6b l4x wlnty $6.9 \times 10^6 \; m/s$ 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.g4pom l/c*rv .0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's respg lo./*mvrc 4ulting orbit?

  A proton is accelerated from n7h5qffr sz; 75:sz4 x8+2 bgtpb)y w;sxtavdrest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to ifs7rzq+d yn8 :hzst;5awbbp4vxfs2; )xg7t 5 ts direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV be8jfex btqs m w;0ch d81t*91bsfore entering a velocity selector. If the B-field of xj b*t80deswq;98 m tbfhsc 11the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?