If the north poles of two bar magnets are brought clq n01pexk8(swd5 no1a(hkq1 hg/zw /lose to each other, the magnetsnxew/q1h kd0 8zhg5kwo1qas /p1n l(( will

  If the south pole of one bar magnet is brought near tp.jd . vsdxk;/oq3;qbhe north pole of a second bar mas .v ox.dk/pqb3dj; q;gnet, the two magnets will

  If a bar magnet is divided into two equal p1x hry7+ ymd (:zz 6quyp80ffzieces,

  The Earth's geographic North Pole is magnetiboy6 a pe-o7v8r1)e6c1 5lvb ijw 1ncrcally a

  The south pole of a magnet poinp)j 0lsw5wl:cwj 6c:u-)if ayts toward the Earth's

  An electric current proesfyrs 6oh8lj88vk;bj 481y r duces

  Which of the following is correct3ge6z yz47i -:vqrlstf,v -go?

  A vertical wire carries a current straight down. To tho2dyv daeerp/01 0 h/ae east of this wire, the magnetic field pointep a/ ehyr1o20dvd0 a/s

  A horizontal wire carries a current straight towardyrsl- ulg72h *:w.izs you. From your point of view, the magnyzis-l wu*rsh:. 2l7 getic field caused by this current

  A current carrying loop of wire lies flat onen fb4wf.(/j 81c bpsr s66hjl6 mqh8r 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, outside the loop? The magnetic fiecb.hf(s6nl8jr rb1s/pq4j e m f6w86hld

  A current carrying circular loop of wire lies flat on ai ff9 ng9okpdg(5gkr1b. o vl)(b +*pj table top. When viewed from above, the current moves around tnp1.9fopk j)ggkigdl(bf9 + r(o *5 vbhe 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 magnetic field vq6y;vxng /c oo2t4)r is the

  1 T is equivalent to/ga 3pfuj: v bd+dn844vr qqw6

  The direction of the force on a current-carrying wire in a mab;9aksj+ l6fyw8m-vqja+ .o c gnetic field is desv. -j+olyc amjs6bw9+k ; 8afqcribed by which of the following?

  The force on a current-carrying wire in a magnetic fr1if b0wnrl4q 2m.e)mx 2wqg ywh)l (:ield is the strongest when

  The force on a curreb mb3zrv)gqd) +s2 cy(nt-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in udtd*eb lzc*,z:5mg6,x 0xb ma region where the magnetic field vector points due north. What is the dixeg,cb6l:0t5*b,*dm ux dmzz rection of the resulting force on this current?

  A charged particle moves and experiences no magnetic force.fr jo2g-ex-xp rmb (.)p(pl q. From this we can concx2(lgo)pf epbxr.q p.r (-mj -lude that

  A charged particle moves with a constant speed through a region where a unif;hmacw23 jrr; +yv(ncorm magnetic field is present. If the magn;crvj2 h+(3;rmacywn etic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a confy :qw1vu b+9wstant magnetic field. The magnetic force on this parti1q9wu:b+vfw y cle

  A charged particle is injected into a uniformt6/wyk u ,ma6y magnetic field such that its velocity vector is perpendicular to the magneti ,uw6y6a/ktm yc field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a z tvv;8 gt99o.wxm9 zluniform magnetic field. If the parl8 t9zg xvmw.z9tov;9 ticle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a cir7fe mc:nplt. uao 4l1, jau pv0b,qrw -y5c);hcular path in a uniform magnetic field. If instead thqu 4cl5m,)fo0p ca-bp .ry ;,evw:aln1t7 u hje particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, angg7 6rs4fsr p1 electron moves eastward at speed V in a uniform magnetic field that is di s64grfsr71p grected straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but ixw;zv*e)(hj vs observed to curve upward as the resuj ; vvzwhe*()xlt of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is .)6d- .ku.tq t nsvrgk7cj ek:a uniform magnetic.ktr dtg)uj qvc7e- :.kks. n6 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 page.)

  The magnetic field produced by a long straigk 3:vz5+vya)z+dg gwt ht current-carrying wire is

  At double the distance from a long current-carrying wire, the r2sn+9* chi;cfym :tk strength of the magnetic field produced by that wire de f+mchc:;sk2*9y irnt creases to

  Two long parallel wires placed side-by-side on a horiscq 9*joz)m-0 h-rjhczontal table carry identical size currents in opposite direc-sjh*jmz 0roc c9h- q)tions. 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 caj hd0pjz sg(12rry identical current straight to2 p0(hsd zj1gjward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equa pv -2tb.x,bhcl currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two xvb.tbp2ch, - wires?

  A long straight wire carries current gzpm5k-d4 ode:w q h-7toward the east. A proton moves toward the east alongside and just south of t4ekqw:g m-dhd-o z7p5he wire. What is the direction of the force on the proton?

  A wire lying in the plan* ; 0wio2lhvope of the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces ovhl;2oi0 ow*pn 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-b:qw l/awj 1xj/y-side on a horizontal table. If the wires carry cuq:/j1 j/awxwl rrent in the same direction,

  Two long parallel wires are placed side-by-side osku g j+(pb qpt+e/c3+**gmh sn a horizontal table. If the wires carry current in opposite directio*3bg+++ss* u phc/tmpekq(gj ns,

  Consider two current-carrying circular loops. Both are made from one zylw 5a3c;pg5:-qwkge8k ; ec9tux r/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 s : y5e9klrkz e ua8;gpg5twccx/3wq ;-maller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made frompsa7fii +fe ,*8x3,d bfp0wts one strand of wire and both carry the same current, but one has twice the radius of thw 8f ptes*fsb piidf,+ x0a3,7e 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 thwl*kv6kp m 1f 6v rwo34f(xs1xe angle between the loop's magnetic moment and the magnetic field vectkf4wxx w3kf66rv(1ov *pm 1sl or is

  When placed askew in a magnetic field, a c);5mf (d ra jd6p9bu+rm*iqb iurrent carrying loop that is free to rotatb r9q5p mrb+) i6;(dma dujif*e in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation ofxf0dpw3z o5pez6 ;3ua essentially all electric motors?p5f6xd p;e33uz a0z ow

  A circular wire loop lies in a horizontal plane on a table and cardfr2wqw ij( 7 74v,;: fojzfa7h0 soncries current in a counterclockwise direction when viewed from above. At thv,s :7o0 4ndq wi(7of7a rhj2cwf;fjzis 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 mass m and charge q - mi)n o x+ix;u/6ob)z:1wcpgzg:d hqis 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, wzzg/uh xg+ondoi )bmq6- i;:x p1):cq, V, and R.

  A velocity selector consist .; rh .t+-xjpeaohpam1 /zje.s of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields arox;a .. h+eja 1-h.e pmpt/jrze 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 A is oriented parallel to a unif*4rw cnl4;cpuorm magnetic fiel*l ;4cup r4ncwd of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in-c0i0 htky ch.*fkjq; 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 +9vozelwh w: ;straight wire carrying 5.0 A when it is placed in a w +lv9e;o:hwzmagnetic 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;-1 slynl7uz3vvx6sc6. x k em w6v8rwo0s ar8 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 t6m; a vs7v.0x1 3zlkslnreu8xw vs86 6cro y-whe magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic fit 1nnkffr)dsl9. 5iew- r/ 3eyeld of 0.20 T. What is the magnitude of t)n3s/nrif 1dfek-w 5 telry.9he magnetic 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 a+t zatm oe(oi:, +d8nspeed 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 speo4rki 0c c*t8eed 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 with speedoz juowvj(,y 7w derb92: -k uc.zx5-c $4.0\times {10}^{5}m/s$ 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 afa0h g;m:hwt ccs7yr 5h6 4z)$8.0\times {10}^{6}m/s$ 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 asos(k+t 1+ndm+zl2yx 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 of z9uovcak6be4z u7v; (y4,bft$3.0\times {10}^{6}m/s$ 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 isw*rxo gy.cpgu,7 1l mx23zuz 9 the magnitude of the magnetic fie,z g9go27y um1lr 3czx.xwp* uld at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the gr+(gs1 j vrxj2qkn qz8ul1d e79ound, 10q(nvj9 +8 qzx 1sgud1r72k elj m away?

  How much current must flojyh; 7 (ke3uviw for $1.0\times {10}^{-3}T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long5l y9pewgqo8; straight wire carrying a current of 5.0 A is the ma;o l 5pq8yg9wegnitude 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 direcsvkg1,z+vc df7l: vf*cg 7c(j tions. They are separated by 40 cm. What is the magnetic7*(svg:vkcf1zd, c +f7 lvcgj 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 2 izqth3p r4(e(0 A and 5.0 A in opposite directions. The wires are qr 3h(t4z( pieseparated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry curre14l+ng7h0h7k6 g qevnet i)(tipyv6ants 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 htaeeyl(pq+k7 v) 7higv6 nig01 tn46 from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They arinm +: /6oqdyof8mo4ie parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm om8qnd6 o fy ioi/+:m4positioned 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 74k zk- 6i,nrvumobk9 in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force peiv kz rb6,n47uk-m9 kor unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire 7hi qj)*2pt.lj pu5q rof radius 4.0 cm when a current of 2.0 A flowlu7q i q 2tpjjp*)h5r.s in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fielu1rhlel ku4+6: , skicd is produced at the center of the solenoid when a c 1l4clek u+kis :rhu,6urrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A.u(b3ou 9 m-b.dcx0le q) 5blrf What strength of magneticbmcllb)du -(9uq3reo5 0f.x b field will it have at its center?

  How much current must pass through a 400 tj (d p6 w/9jcfkbma9w: :lef(surn coil 4.0 cm long to generate a 1.0-T magnetic field at the cenk j 9(: fmspa/cj96wd(bl:efw ter?

  How many turns should a 10-cm long solenoid have if it is to generate auio ;v2ky p502y2svhb $1.5\times {10}^{-3}T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loop of 120 turns that m/ 1d/sdr.;iysu w izigi w9h*29gr b6gfb4;fcarries 6.0 A if its dimensions arhfis/*ibg1.sw r i4d br;zfm9di9yw6g2/ u g;e 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a u90, i hopebx5(bai 8hxniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whatx5b8h9 x(ao,ieb h0pi is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional n3;ek7nnaph fh68wy2 tl f(m.area $0.12m^2$ 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 magne16o10 qj dy.p0gyyl pttic field of 3.5 T. The loop has ag p0pdjoyl11q.y0 y 6tn area of $0.12m^2$ 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 ra/t7lx+c hm7 g.e:9b 2g3q .iyp bpcs xm9vmm,tdius 0.50 m is in a uniform magnetic field of 0.30 T. The current in thetvmec m gbqixm xcp+ytb,9.3.7mphl 2:79/sg 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 0.50h p-b9w/1qi ip 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 the1ibw/q pp -9ih plane of the loop is parallel to the magnetic field?

  A circular wire loop of igzw+bi/67r /wjtrh )area $0.25m^2$ 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 spectrometere33qrqr o3ef 0*td.pd, 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 wizzc 9f2h/arr .4b fxu,th 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 in0fnm. 1 l:wosg jf )gnj.bkr63to a magnetic field ofg61wjg.f:k jrfn sb o.m 0)nl3 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated froci4g on3. tbiqj5 ar++m rest through 500 V. It enters a magnetic field of 0.30 T itqn.b5+34a i cjrgo +oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is acceler k2zsij(t fef 5q3 d(2:aui.erated through a potential difference 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 is required if the particles are to be un32:idu2 5jeieqt (fak( .fsr zdeflected?