If the north poles of two bar ma t/e7s8qzrx;he z 3gr,y4x tg5gnets are brought close to each other, the magnets wil 5hxt,8y rxz7zqsre ;3/g ge4tl

  If the south pole of onje5t;8(r lg4mjz*0ohq.h;ojd a l wt/a3;i bie bar magnet is brought near the north pole of a second bar m.a;jhh tli j/d4aj0bqtogmi8o* e(; ;zw3r5lagnet, the two magnets will

  If a bar magnet is dividel .git;3oc81 pqc ho,lb h.g:nd into two equal pieces,

  The Earth's geographic North Pole is magneticallyka;pt +q,j ,yoz+-vn a a

  The south pole of a magn6dhla-.ig ,5zfh sk3 ret points toward the Earth's

  An electric current prodvt bj49y8io /b:6 id*cwhjo3ox mu(w2uces

  Which of the following is coummy40 +tjr1k ix8znrr ox;l1uk-::errect?

  A vertical wire carries a current straight down.ixl n3qlm:81j8j o z)o To the east of this wire, the magnetic fieldzo q8xill1: 3jjnmo8 ) points

  A horizontal wire carries a current straight o:;+m.id e,syri grq (5pss 8wtoward you. From your point of view, the magnetic field caused by s;, + sw8.om 5(irdipyg :eqrsthis current

  A current carrying loop of wire lies flat on a tableys,.nj m ix0;d top. When viewed from above, the cy. m,j;ds0x inurrent 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 lo):xm6jhdx; o -np1 a2plc5pvwop of wire lies flat on a table top. When viewed from above, txdc-a)nppxvop1 l6w h2 m ;:5jhe current moves around the 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 cj ho*xv.r(xqz o r.o)o6*yk 7is the

  1 T is equivalent to,rt n3v.cbti w9: ot8.mm k5fw

  The direction of the for g nafcea95pf/3n nx7iyk3m;6ce on a current-carrying wire in a magnetic field is described by which of the following?pm; fi3a/ eynnac7n 3g9 k6f5x

  The force on a current-carj e z a5b5hr+u7g:hba*rying wire in a magnetic field is the strongest when

  The force on a current-carryind( pe75bh6pc7zh6 da mg wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magncoxoly9 s93e p1i ,8; dfvgr:qetic field vector points due north. What is the direction of the resulting force on thisx;qrips8fdlye3 9v: 1gc9 oo, current?

  A charged particle moves and experiences no magnetic force. Fromt+gyz :p gghb4f0n2t; this we can concludeh2 nzgpt bt4y0gfg+;: that

  A charged particle moves with a consta-2o6cj r l2lnant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle mjl ao-cr22l n6oves

  A charged particle movese k*jg8k2 bc8ev)ypc+ across a constant magnetic field. The magnetic force on this pk8cg )v*e2jkb eycp8+article

  A charged particle is injected into a uniform magnetic field such that k 1agow3 /x;azits velocity vector is perpendicular to the magnetic field vector. Ig3o;/ az kxa1wgnoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform g/7k s1* vvtz,76tmlg;ypuuamagnetic field. If the particle had been traveling twice as fast, the radius of the circular path wou gz*gut,;6 7mvavtus klp7y/ 1ld be

  A particle carrying a charge of +e travels in a circular pathfbxy 9o(7. u6(/kr,cp ituqdi in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would.9/bxupfty ur d ,ikcq(67 i(o have been

  At a particular instant, an electron moves eastward at speed V in a uninvy +(.r2s:s5jzo 5vlj omh j;form magnetic field that is dso vo2.5n; hjj+svl zy5m (r:jirected straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed vnqhv *t 68l-oto curve upward as the result of a magnetic field. q-h6 v*ntlv8oThe direction of the magnetic field is

  An electron moving along the +x axis enters ah sehz+7p q7. zmfxnsz/- u;w/ region where there is a uniform magnetic field in the s/fsup +x ;7z7 -q nmh/z.hezw+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 produ82 1e15x0xo qjtpm ngcced by a long straight current-carrying wire is

  At double the distanc h7af9 v:(9pneag1wyce from a long current-carrying wire, the strength of the magnetic field produced by thay c9:e(nwha fapg79v 1t wire decreases to

  Two long parallel wires placed side-by-side on a horizontal tabsd)x-.a9wj18 y5(nf vvi aebale carry identical size currents in opposite directions. The wire on your right carries current toward younwaav9ex)v d 5-a8b f (y.1isj, 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 ca9-cz( wnw/ pr1zanhp,rry identical current straight toward you. From your point of view, the magnetic field at the point exa,p(wzn w 9a p-crn1z/hctly between the two wires

  Two long parallel wires carry equal currents-qxexat/ 0le /ey2r;d+n2ens0wnt1 w. The magnitude of the force between the wires is F. The current in each wi2nq/l+ 0e n10-nee/rat 2dwyxt ;exswre is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward -vr teds 0z;s0 s8dbt;the east. A proton moves toward the east alongside and just south of the wire. Wha8; s vd- s0tes0;dtbrzt is the direction of the force on the proton?

  A wire lying in the plane of th/yi 5czft o9io/-yh6 ye 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 in the plane of the page, from o95iif -y/tc/yyho6z your right?

  Two long parallel wires aro dnyw1p 6;n1xe placed side-by-side on a horizontal table. If the wires carry cur ;oyx1wpn1nd6rent in the same direction,

  Two long parallel wires are placed sy rpou pp0y0 *hq8t+w x+ds)*nide-by-side on a horizontal table. If the wires carry current in opposite direction+un0oypqhwd*t rx pp8s 0y)+*s,

  Consider two currentx2ltdz-sec;vhn 077 ce9( nd2wk vjd3-carrying circular loops. 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 field at the center of the smaller loop, the magnetic field at the c0 ezs27nd9n vdwtj x( ;d2h -l7ecvk3center of the larger loop is

  Consider two current-carrying circularlrr (dl2 0u)5vgcexr5 loops. Both are made from one strand of wire and both carry the same cu5dc r)52uvxr0lg(rle rrent, but one has twice the radius of the 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 the angle between the 03cj fve )ttu1 rilj ;:g*ier3loop'sjjir3tf)0re;1i l 3 uvegc *t: magnetic moment and the magnetic field vector is

  When placed askew ing*raz / 2dxb.k a magnetic field, a current carrying loop that is free to rotate in any direction will experience a torqd/ba 2 k.xz*grue until its magnetic moment vector

  What fundamental fact underlies t+ensbcw :0tpb4m9x * phe operation of essentially all electric motors?4eps90 bnwtc*b+p: x m

  A circular wire loop lies in a horizontal plane on a table aarb5x u9zkk k, 2n8zirkb-r0)nd 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 lift off of the table because of the torqu25a9zru izr ,xkbr-0kk k8 )nbe caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated throd20rwkos/g 0 eugh 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 pe ko/sg0ed02r wrpendicular 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 crossewfz)0iv ,-n7wwj kq nn:ggs, 2d electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only partin ,g j0gq2z-:wsi7vww k fn,)ncles 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 uttr tn4pl; w 112la7ujniform magnetic at4ul wn j171;r ptl2tfield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a cur6)+sj*u9vpb v)xig s ssvl0h9rent 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 mete0eqh,35 v4mxvn ega ur30 k+9ghenc(0 c1hhwzr on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire ma5c x3hu, eg4v0k 0r q+gc nh9wz 3eeh01vnha(mkes 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 fy9r*ju +/g vkkg and is in a magnetic field of 0.10 T. What minimum current9jyrg/*uf v+ k in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a ucg)al03j( h9um bcuub0r8fz .niform magnetic field of 0.20 T. What is the magnitude of the magne gju080.bmr)hf 3auzu9c c( lbtic 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 withher8vf + at82vt70 ksh 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 sp3gv7 1go xd2-ynr*u cz /3enkreed 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 nort/udf-m8zi, xa6sen-qh 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 wi8v +s- msjrs-w1pqrjqq5y)8 cth 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 of0;7dk1f-uhb-+l0cawjk j i hv $8.0 \times 10^6 \; m/s$ 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 a h w tcdqq,jjf+ k huti+56l.yrq uv;./)c(6a$3.0 \times 10^6 \; m/s$ 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 wdk uc8+l b-8n +yl8egcarries a current of 25 A. What is the magnitude of the magnetic fielb8udl y- +8glckn+8ewd at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generate(a9 0o nvl//sw(v hyjb5ezb7fs what magnetic field at the ground, 10 m awayj 9vhb(y7a5bl enf/ o(zw/v0 s?

  How much current must flzxgp,wzim4wm r p.)1 7-/hviuow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long1mhb,e vkfl i 97bi 5pjfn:;2tign8 -ds4q2te straight wire carrying a current of 5.0 A is the magnitude of the mnfbf -,n st847iigtpj dblkq1h;e 5e29mv:i2 agnetic 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 direct oq w2d3u3dytjw/3gv-ions. They are s3wg-jd yto 3w3vd2 /queparated 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 5iqlk/f h er32hv83 ao,.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic fielf2hhe q3vi,3rl/ao k 8d midway between the two wires?

  Two long parallel wires carry currents of 20 A andyy .4i-azatr ef;kz(oa6a9 w* 5.0 A in opposite directions. The wires a; az-y*f (kta4raoe 6.a zyw9ire separated by 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires ex6 b 0pp+abv2 yzw2r7bach 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 vw bpa20rzb27 6xbpy +one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 lr(kl fs1.lbp61 b ,ciA and 8.0 A in the opposite direction. The wirelb1f6.bk(p , lic 1slrs are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a hql*d6 tuq+) j1 8inr(p+1;fbmkb dflcircular loop of wire of radius 4.0 cm when a cj+tm 1lilufp)d *bd+n bhq;81(kq 6rfurrent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 50001khcycc 4n3; u turns of wire. What magnetic field is produced at the center of thcnyk3 ;14 cuhce 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 A. :6dh;;l di6 lrhrc34a0k uhji What strength of magnetic fierd;ahju:3c6dhl6k l4 i 0;ihrld will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a,en/b;czau30hm8 p-u9 xo w ep 1.0-T magnetic field at the cenz3upp08e9woa cmu;/-,n he bxter?

  How many turns should a 10-cm long solenoid ha s9gc,r japf/gl7zre31)m:pd ve 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 of7) 1oj)yil k6noz2q jw 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8l6 1)o7ki2j jq )wznoy.0 cm?

  A circular loop of w -(cis9manxma1u f*k r0x*zv)ire 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 perpkx*a)9vr0s( *au ic nm-xfzm1endicular to the magnetic field?

  A circular loop of wire of cross-sectf2a x;w p6o:z3ljqr:ip h38k rional 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 whvve uuoc /tsg (706a )qs69zT. The lou g 7ach tv6)s /6vq(uzsw09eoop has 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 m4a cy-1 1ts7tscud1pl agnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plals p4sd1c1t ty71c-au ne of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniflxc5b-+* vka yn1xbdf0hzq+ftt, i82 orm 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 parallel to the maihq1xf5tt2 ,+lf0nad xb*8c v b-+zykgnetic field?

  A circular wire loop of are c- +g(voy1bdja $0.25 \; m^{2}$ 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-cha8z/n x, pdldp:rged 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 wit8+lo5/pk rpm 7p lkd)muf.3j qh 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 t 0iyypno*c. 7shen moves into a magnetic field of 0ci0* os7ynp. y.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters ;je;fk xt gre--jxx 4.a magnetic field of 0.30 T oriented perpfj t x;;-4r jg.exex-kendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potent-,gvbcrj3x,q nro* -ven87hmial 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 bn*e qrvn-rch-3 gj7o 8,mvx,the particles are to be undeflected?