If the north poles of two bar magax l)7o a)ro)hnets are brought close to each other, the magnets wioa xharl7)o ))ll

  If the south pole of one bar magnet is brought near the north polco/,:o(kdr*ghs o3s 4sp( ecve of a second bar magnet, the two magnets wkpv:(o ,ssc4/drs (g*he c3ooill

  If a bar magnet is divided into twoq aiq. +ye (gf242dgoz equal pieces,

  The Earth's geographic North Pole is magnetically f)u mss+vf1e sl-c e0sk0.eop:0otl) a

  The south pole of a magnet points/26m41tr,8 nfnxjiffc 7 w cqv toward the Earth's

  An electric current produhzw 3l5h7x7b8ial0 li0sk 4o vces

  Which of the following is coryu4gg+b3f6g5 9 oxrsfrect?

  A vertical wire carries a current strzm,xfzlx85v(67x d ax aight down. To the east of this wire, the magnetic field pointmxz8(7 xx 6xfd5alz ,vs

  A horizontal wire carries a curre*6kf c:)y skvexbvuw1w/hv)- 8dyhe+ nt straight toward you. From your point of view, the magnetic fyvdf8hk/1s6w * u:)vwevkhy)-x bce +ield caused by this current

  A current carrying loop of wire lies g83k/ gb* 8:a;z fo-nrvxqr tuflat on a table top. When viewed from above, the current moves around the lo 8gkgou/bt f-3;*z:avrqxr8nop 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 l k m16kn1nqcpa a;16h w reh25c4cr7ntoop 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 this current, inside the loop? Th2ch ;1krne5n 61k pq14cmc t6n7hara we magnetic field

  The SI unit of magnetic cxzeo0 p,snv/2h)xj; field is the

  1 T is equivalent tobk5m9 k3og2 ;1j.mpcu yc7 okp

  The direction of the force on a current-carrying wire in a magnetic field ip s r*j/hq)q9ss described by wh/qq*ssr j)p9 hich of the following?

  The force on a current-carrying wire in a magneticdloccdd b :ivj)3 8d53 field is the strongest when

  The force on a current-carrying wire in a a1kev/w e1+h y )qy db9kceeg9i2e 2*imagnetic field is equal to zero when

  A vertical wire carries a current strai blora2itm1b8t;m +t .ght up in a region where the magnetic field vector points due north. What is+i1r2 tl.a t8bm mo;bt the direction of the resulting force on this current?

  A charged particle moves andt xx: .jr1a;i t zj3(pwu-8dhy experiences no magnetic force. From this we can conclude tha zi dx:.(-u1 3ty jtrj8pax;wht

  A charged particle moves with a constant speed through a rtp-6 lv/lcb:aegion where a uniform magnetic field is present. If thpv/ll: b -cat6e 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 magnetic field. Th(eirqw4ao,crg5y gd* *ru* 5re magnetic force onuwi e,yagc r*455*rrg(oq r d* this particle

  A charged particle is injected into a uniform maghi.9io1 yuxu- netic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weu o.iy-ix1uh 9ight, the particle will

  A charged particle is observe5by11g x)ik fd*fjbn3 d traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of tkg1* bx31) fdni5ybjfhe circular path would be

  A particle carrying a charge 5,tr ind)8oli of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of i,rl5dt8 i o)n+2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speedq+awt0w3.eyg V in a uniform magnet03w +gwaq ty.eic field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to jh 6/ jo ti+*lq4wvrv1 xfb( 5pk)p1zkthe south but is observed to curve upward as the result of a magnetic o6)(pkv5 jb*1zq t+w vlk/h14pjfx ri field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region n-qn h(yeiwad4 szic)z(b +-2where there is a uniform magnetic field in the +y direcescq2z -bn)+zhy iw(( d a4n-ition. 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 straight current-carrying w-:7gghv7j3o w2 y8 spn u5vzboire is

  At double the distance fromxc6(w3f+3x cim o2jg wxt0km2 a long current-carrying wire, the strength of the magnetic field produced by that wire decrease23(m mk xt foig6wjc+0wx 3x2cs to

  Two long parallel wires placed side-by-side on a horizontal table ca (y;zrpbl1k7wry 3nh1 rry identical size currents in opposite directions. The wire on yourrwzlybkh;(p 31 n y71r 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 tablekc ui+t)9im 9h carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the two wires+c u kmi9t9ih)

  Two long parallel wires carry equal currents. The magnitudxi /jlcs96b-be of the force between the s6xljb/9-i bc 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 cuugk.x/onfm t-woetm5h/)9s ;rrent toward the east. A proton moves toward the east alongside and just south of the wire. What is the dirx)omo;utn s /w5m hf.tk g-e/9ection of the force on the proton?

  A wire lying in the plane of the lx/)v fitpojx0z76fy 3i 0l y5page 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 in the p)loyvl itx0 /5f j0f7x iz6py3lane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal tablrmgbretyi9 u5 am, .r m3xj3-4e. If the wires carry current in the b.-m,j3im ta rrr9ux5mye 43gsame direction,

  Two long parallel wires are placed side-byr,c6epl suhu;7vfj.- -side on a horizontal table. If the wires carry curr6-huf7l,vr;c. puse jent in opposite directions,

  Consider two current-carrying circular7 jc +b/bpiv6l(2b)znnydv4 p loops. Both are made from one strand of wire and both carry the same current, but one has(bnpblni62 c4)7+ vbd /p zjyv twice the radius of the other. Compared to 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. Both are made from one sas - ehh)exuo 76m79nktrand 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 m e)uo-hsa9mn6 ek7h x7agnetic moment of the larger loop is

  The maximum torque on a current carwh,6kfz +hf ,.ho+( uqv4pgg brying loop occurs when the angle between the loop'gg kp zvfqo.hwbf+(64 +,uh h,s magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a cur a +pbc3 p*yex2pk1xl4rent carrying loop that is free to rotate in any direction will experience a torque until its el3ax p4xb1 2*k+cypp magnetic moment vector

  What fundamental fact underlies the operation of essentially all r-oqus9e3 r - e(a)aczelectric motors?se9)u (ecz -r raa3-oq

  A circular wire loop lies in a horizontal plane on a table and carri,l7t0xd2-/8sc- whdhz fuax ies current in a counterclsxc i2f-u xdldzw8t0hh -/,7aockwise 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 mass m and )7 khv9 3l6mrdn 5bbskcharge q is accelerated through a potential difference V and allowed to vmk hkb93 rs)56 ld7nbenter 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, V, and R.

  A velocity selector consists of a charged particle passing thsrwbg4d,e,eml/l -fyotw 12) rough crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, an4,r tew gwbf1o, se) /my2-lldd 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 + 0jebgfn+ .,) vhmvfuuniform magnetic v,)+gm. fjvefnbu0+h field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directiatmpvz)pa f z9846q ni7- rd6ion 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/c(h vd tcxhbu,t+lf36 sa c/7.0 A when it is placed in a magnetic field of u3sccd/lt(,t a/c+ hv7hb f6x0.020 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(z rzz: 5g.mh;ix/v mk wmld,; a magnetic field of 0.10 T. What minimum current in the rod,(.;zmd5vhkix;lm:/rz zwm g is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform mag s6py rov/i6yl,1w-flrlsr -7netic field of 0.20 T. What is the magnitudf-ols6llrv yw y 6s,1-ir/p7re of the 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 wiihvh7bj:xoo2+c j g*8ai, ,vcth a 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 speemo)pv0 p( m,xxd 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 ny a)qn8m6*gxd(+z+ajx zk-b lorth 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 witl-dkt sx)e:mzxq uig6x;418x h 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 magnetic force of the electron.

  An electron moves with a speed ogos-95,n3f u byau m, 4c8xnjtam8n4 vf $8.0 \times 10^6 \; m/s$ 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 speedfamzlxhizy *h .zpn 84*(h9y0 of $3.0 \times 10^6 \; m/s$ 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 4jgptb.ol1z 2 25 A. What is the magnitude of thep.lbz t4g1oj2 magnetic field at a distance of 0.15 m from the wire?

  A high power line carryo9v z;(.haci c /kd5qqing 1000 A generates what magnetic field at the ground, 10 akv.;odz5qh(c/ i 9qc m away?

  How much current must flow for 35aa5, c rl-q bfgerk,$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carryinu *, 6tomsr+plg a current of 5.0 A is the magnitude of *o6mt+, uprlsthe 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 direct8*z*5)pn/tthgz ar i kions. They are separated by 40 cm. What ik zz** n)pai5g8th/trs 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 andc:x(x / 9n-w5o3pff i tftd9pd 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betweentw nxxd5(tpip9 c9/ d:ffo -f3 the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in tb;utt m5k z(ko;ghvfr6wp ,9e;+ 8k mopposite directions. The wires are separated by 0.20 m. At what point between the two wires arefz gw v mtkt8;tk,mk;6uep 9 (;rh5ob+ the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same directize fym80rv/ 8-3isft bon. They are parallel to the z-axis, /ify8r f etm-38s zv0band they pass 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 0* vrn, , s miqrhdxy0l:ehyof,;1wo.8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the v,yx,o00 yqwf,seh.or1*ihnd rm l ;:magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular lcj, n zfs58,u8 yiqns1oop of wire of radius 4.0 cm when a current of 2.0 A f,1uqis85szf8y,njc nlows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What gfgjy5e /p4qox0rl(/ magnetic field is produced at the cegj xpe qol/r5f(y4 /g0nter of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 k 7bqse052jlw,cbbx4A. What strength of magnetic f0k, 5 bxjqb7ebw42 lcsield will it have at its center?

  How much current must pass through a 400 turn,qkhclf3 8ka0 0b(o bn coil 4.0 cm long to generate a 1.0-T mag3 o( klncba fq8h00,kbnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to generate a) gyxiyh-lxp;f1 xh1t82zj8 f $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loops-b/g/iwqcha:m4m7jom*k tn 7)br o8ar)eo , of 120 turns that carries 6.0 A if its dimensions are 4.0 cmq,irc4m7)o mkwhr)as7//o n :o*bme-j ga 8tb x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unifoh6 .j(kbus 0q w8ahlt(g/szh6rm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loophhh(ukj/ts06z g.qw (b86s al is perpendicular to the magnetic field?

  A circular loop of wire of cvz;atgqy p ffu18 ;u:/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 3.5 T. Th5im- r g;dty6/.vp wjue loop hastgdu6-5 /rm ipwv .y;j 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 field of 0.3l1t (3eo9n gpptq p.j84 nh1yy0 T. The current in the loop is 2.0 A. What is the magnetic torque whentgl1n .ye oqpjyp9p3t8 4 h1(n 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 of ouv )v*4x3g vg0.30 T. The current in the loop is 2.0 A. What is the m4)v o*gvug vx3agnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop ofkabgdr * (n/7j 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 (charge e) has a speed off2/gd4 2 kyt6bpv ivn, $1.0 \times 10^6 \; m/s$ 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 vehr*s kbz2 n)ano 2xo 1rn;v22vlocity $6.9 \times 10^6 \; m/s$ 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 any.3 w1 zk 1xw; 6-u5jotfhbvbyd then moves into a magnetic field of 03xo;1fy kbtu1y j5w - v.6hwbz.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field o72 6yvdzgdxl) f 0.30 T oriented perpendicular to its direction of motion. Determi2l6dzy d)g v7xne the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference dfv o b*qz(f ws744m1kg .*zsvof 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 tb sqv1s(o. w4fkdz7fgm*4v *zhe E-field is required if the particles are to be undeflected?