If the north poles of two bar magnets are brought close to each other, the ma: vp+p6nse;gv z rro7 ;;le2yb0gn6svgnee0;npgrr2oy ;;s67 bpgel nzv+:vsv 6ts will

  If the south pole of one bar magnet is broughg :u) tk6jgzn/t near the north pole of a second bar magnet, the two magnz6jkn:u)/tgg ets will

  If a bar magnet is divide 5jjw+dv000 kdu ;umfrato1v, d into two equal pieces,

  The Earth's geographic North Pole is j *o(3 n5.txfjst+.y yhnq5qomagnetically a

  The south pole of a magnet poin1iqscjez. . m1ts toward the Earth's

  An electric current pr41bqe x xz;c9b8+lcky oduces

  Which of the following is correct? , 1z)kgc;y -pbxfm7ntanz 1xvq5j.* q

  A vertical wire carries a current straight down. To the east rq zbfxj0 y 4na0gva28ly;2s5of this wire, the magnetic fielsa4g2028fb5;a l z q0nryy xvjd points

  A horizontal wire carries a current straight toward you. From your point of:bk 7ut2m8jxgalhi. 6kq 2ig - view, the magnetic field qi6 k2u-kxlbmtg827ag: hi. jcaused by this current

  A current carrying loo , m0bfy.rl82y,w e 3/ngdysltp of wire lies flat on a table top. When viewed from above,gb e2s.8/lny0f ml 3 ytryw,d, 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 field

  A current carrying circular loop of wire lies flat on a table top. wh 325 1g*:azsg:k- f j;bwnyrevt 06/ fqthuvWhen viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field cau vw/nh:f-53zks2tjt*1 h60eva rfw:y;u gg bqsed by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is d8ppb4s) o9 r19gh)7jmulcij the

  1 T is equivalent to8yd 7f82alib k qoujgrh+*1f -r7 n3in

  The direction of the force on a cure gjbt6dp ,9n6rent-carrying wire in a magnetic field is describnte 9 ,6b6gjdped by which of the following?

  The force on a current-carrying wmynh8b,x( nna36 4eiio ed64 d-nkiz:ire in a magnetic field is the strongest when

  The force on a current-carrying wi8nb v*m3pd,x- we ezj(re in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magnet.rbk7q p ,+npx7p/ zbb+is tu.w0w qf3ic field vector points due north. What is the direction of the resulting force on this current +z0wxb3f7,ips qr.bt/kbpnp .7q +w u?

  A charged particle moves and experiences no magneticn2,+ ib t)aluj b(- qla.k4vyc force. From this we can conca,nvcu)y+abj kl.q- 2 (itb4llude that

  A charged particle moves with a constant speed through a region(+ hx0k4vpvci where a uniform magnetic field is present. If the magnetic field points straigh4+(ic xhv0vkp t upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. oem4 h5owbs, (dy1w8;k-p g/ vvjyp v7 The magnetic force on this particlj-g5yo hsb ;w(kp,81d/47p wmeyvvv oe

  A charged particle is injected into a uniform magnet ddos ckj 6:e7nc+wz4erg*t*8 ic field such that its velocity vector i7+c c rg*nedt6* 4eozw:s8kd js perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a8c5-5 sm7 i8t 7ui:tx fcvfynt circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the cirtc7tc yfv85nu 57t m -isf:8xicular path would be

  A particle carrying a charge of +e tsa4 e02)si zjkravels in a circular path in a uniform magnetic field. If instead the particle carried a charge s4ka0 ijz 2e)sof +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V q xh5yhmck0),in a uniform magnetic field that is directed straight downward. The magnetic force,c hx) ykmq0h5 that acts on it is

  An electron has an initial velocisl8--2d*k d*tnoks y kty to the south but is observed to curve upward as the result of a magnetic field. The direction of the l-n 8k*ts2-k kod*dsy magnetic field is

  An electron moving along the +x axis enters a region whu) h 0f(lun)ccv*wb d( ab7av,ere there is a uniform magnetic field in the +y direction. Whc (al*(ban0)cd) uu ,wvbvh7fat 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 sr 7wp/pjzp5m7(rgr:jo-l h ;ew n3kwj a-5ad)traight current-carrying wire is

  At double the distance from7oj.jhh;y . rv xv18cm a long current-carrying wire, the strength of the magnetic jx;j.v7h 1c8mvh.or yfield produced by that wire decreases to

  Two long parallel wire.v g qup1*g2tkc h20a(o1q rwps placed side-by-side on a horizontal table carry identical size currents ingout.1chaw v1 q pg*k0p(q22r opposite directions. 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 horizonta5qp8 wm 1q), e8* nsiv, cbaata/0mtbil table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly betweenqw8tacb v),58ei01 sq,ip mmnaba/* t the two wires

  Two long parallel wires h41.ej 4qzq qpcarry equal currents. The magnitude of the force between the wirq1q q h4p4ejz.es 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 towz 6 e6;4xvmhu8yatz.rj)s)adard the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force ona4xam6r v;yt.u) )sd8he6 zzj the proton?

  A wire lying in the plane of the page carries a current toward the bottom ofw ,auj h)s,rs1 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 planesah,rs1u ,w)j of the page, from your right?

  Two long parallel wires are placed side-by-side on a hw;g 1xs0; rwmworizontal table. If the wires carrs xm;1;wrgw0wy current in the same direction,

  Two long parallel wires are placed sikcmcis;hz6z, 1+v j g3de-by-side on a horizontal table. If the wires casi h,jkgz6 +;vczc1 m3rry current in opposite directions,

  Consider two current-carrying circular loops. Bouno4u69.) oezvm p:t.m ) yagqth are made from one strand of wire and both carry the same current, but one has twice the radius o:otanu.muqg9moe.yv6 )z)4p f 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 m2z* bs s)/hvevade from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the/ hb)z*s s2evv magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurf 9zx(* qy;fhzx cv n(ne)fcj5 -cpu64s when the angle between the loop's magnetic moment and the magnetic field vecto( 9x;(fqzh*fcj )u5fzp6 xne4-v cncyr is

  When placed askew in a magnetic field,k.h qjiy 1b1xv ckm/6;isq3w3 a current carrying loop that is free to rotate in any direction will experience a torque until itssvj31xi/hm c6k kq; .3b1iq yw magnetic moment vector

  What fundamental fact underlies the operation of eyp egf/f6o w/;ssentially all electric motorspf/fy oeg;/w6?

  A circular wire loop lies in a horizontal plane on a tab 6/gpva)bmvv1xh b1c* )-dtn kl t6)cjy8aq h3le and carries current in a counterclockwise direction when viewed from above. lhxgv 81qc6a hjd)b/k)c*pvm-6v1)tytba 3 n 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 charge q is accelerated bfv( xcvfs8 8(y2/bo qz*c-bp through a potential difference V and allowed to enter a magnetic field B, where it is deflected in ax(cfq/ z( b2-p*y vbvoc s88fb 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 charged2,ipct w)di 3i particle passing through 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 fields. In a velocity,t3ci)2p i diw 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 u 6q cq7s q-ste vgvwy5.ae650dniform magnetg.e5 6tway6705- cq ssqevvdq ic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a currentr f-ma:la2*w-. 8r-kiaf f tg)+y phik of 10 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 is ply;fel4v(dq; w c.8ji qaced in a magnetic field of 0.020 T? The wirlji fqe.4yv;w (cdq; 8e 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 anm*o340)i rk z/:7bu qag jgzflsq3 0kqd 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 gqa30o lq03rb kzi*mks4zgu:jqf/ 7)the weight of the rod?

  A stationary proton is in a unihb)x:6z4 vu phform magnetic field of 0.20 T. What is the magnitude6zv4):hpxh ub 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 with a speed oqio ljmifgcy2)i3w-+ e7lq7 0f $5.0 \times 10^4 \; m/s$ 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 speed o.jd0+ldx /wsel e r-m2f $5.0 \times 10^7 \; m/s$ 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 nortz9dfy z(4wjj.cp drv3w, 0.cch 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 t6(w*ffvx hk 6a 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 ci s0 t.vsg8+pa 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 o4s- pc8cbl 2ulf $3.0 \times 10^6 \; m/s$ 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. Whr- k g;qoqt:r(at is the magnitude of the magnetic field at a distance of 0.15 m from the r ;g:(kqtorq -wire?

  A high power line carrying 1000 A generates what magnetic febq ;87skfnh z:u/5- l y+cycwield at the ground, 10 m a5 yk qcley7w:nf8bh/c u-z;s +way?

  How much current must flow fo210a) khvxwswr *u yh.r $1.0 \times 10^{-3} \; T$ 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 A is the.; aw3hwocxv7 magnitude of the xhcw; 7a3ow .vmagnetic 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 directionw m2q(1o kxkw m(:n5zts. They are separated2 komm :(t(nqwkwzx51 by 40 cm. What is 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 and 5.0 A ia h9*l;wa3+s:sqymel n opposite directions. The wires are separated by 0.20 m. What is the magnetic field mslsw; 3ym a*9la :ehq+idway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 *yrbvh -+lkr: A in opposite directions. The wires are separated by 0.20 m. At what point rlk-yr+bv *:h between the two wires are the contributions from the two wires the same?

  Four long parallel wirio3:m z*y wwq w-39pdres each carry 2.0 A in the same direction. They are parallel to the z-axis, and 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 ewyw*qrpw-m 39:oiz3d xperience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8 mja+ nca45o/d.0 A in the opposite direction. The wires are separated byoajmad4+ 5 cn/ 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circularqb34r2 fb8 ,vbb82 z9uit.b0h duwh sr loop of wire of radius 4.0 cm when a current of 2briu29 .0b2b4duhvbt8,3bz s f 8hwqr.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fie9)gu )iwbk ,gsld is produced at the center of the solenoid when a current of 19iswbgk g) u,)0 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of3 ub6s.duv i 6owm00lf 4.0 A. What strength of magu.m3l6i dbu6 v 00sofwnetic field will it have at its center?

  How much current must pass through a 400 turea7j coautj+:3k 4u*fn coil 4.0 cm long to generate a 1.0-T magnetic fieje7u:taa uj+ 3c*kf4 old at the center?

  How many turns should a 10-cm long solenoid(dbrzc: b( 6.lb foowuk6z.; z 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 loop of 120 turns that carries 6.0 xjwn913 -eo +w:ga(b3u 2l)h ekuyhvm A if its dimensions are 4.0 ckun)h+- ov33yulg2 : jbwa9ee m1wx(h m x 8.0 cm?

  A circular loop of wire c,dl/4fuce/t 7r6 u5fupmww2 of radius 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 when the plane of the loop is perpendicular tow2dtcrup ,u/lw7 4cuff /m56e the magnetic field?

  A circular loop of wire of cross-sectiojccjtw5;ant dg63* a; nal 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 carrg63 zlwkdwd: fj,u4n5ying a current of 2.0 A is in a magnetic field of 3.5 T. The loop has an aw 56jdk:fdgnz 3,wu4 lrea 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 0.1sp/wpw wut. .5ejrfs2vto9nq6zpv- xk5 7g650 m is in a uniform magnetic field of 0.30 T. The current inuf5ws- z79 xp6tso5g v1pej.krqwpv w/6n.2t 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 wih(k;+g y .x npq3;dzxw .37 vspc5kybqre of radius 0.50 m is in a uniform magnetic field of 0.30 T. The qxp qy;;s vz(7ykn5g.d+ c x3kbh3pw.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 wire loop y+z()u,b6h.f5t y f dtholb1h 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 single-charged particle (charg07jyv :zb-cal x65u f4d ux+kpe 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-r.3ed fmuhbq s9p,j3nv; v/n 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.b z0;nixs ov0 ehu7x7 l* d((slb01rii0 kV and then moves into a magnetic field of 0vzs usol0libi((i;b0x0d ex1rn 7*h7.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. I3lk 2s(lw49weyj-j9q ul jt+rt enters a magnetic field of 0.30 T oriented perpendicularulkey 2 ts9+r-j( wq4j3j l9lw 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 kV beforj pj;x50ot.:*htpeoi e entering a velocity selector. If the B-field of the velocity selector has e0;ooihtp*5tpx j:j.a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?