If the north poles of two bar magnets are brought close to each other, the magne99ju u ,ti1hg e9i/o pwl/es)zts will it )9ghwp1 jl/9z9uo uise,e/

  If the south pole of o/cycvd6 -i aaodj 9k5)x5 q/*hdj5 l:vzknt*yne bar magnet is brought near the north pole of a second bar mag-zlak9cjx5y5d/v ji dvc/t on56y qha :k )d**net, the two magnets will

  If a bar magnet is divided into two equal pi3.6ilpdrq 6igwrd/ h+ eces,

  The Earth's geographic North Poll4prtr(5 gr yqk7z-y* e is magnetically a

  The south pole of a magnet points toward tv f;xd7qh eq8.he Earth's

  An electric current pr bj)*lefv6h ,woduces

  Which of the following is cwiw8, smda:lbv: q) 5vorrect?

  A vertical wire carries a current straight down. To the e;wnx2j:)py2i aeqz zt;me7 .yast of this wire, the magnetic field tmi y2qe :zyep) w;j ;7x2zna.points

  A horizontal wire cafrv831(drey it np ,n-rries a current straight toward you. From your point of view, n ityrverpdn,3f-81( the magnetic field caused by this current

  A current carrying loop of wire liesuwan +yx7l :30d/wp io flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction wyu:/po0 i7al+xn w3 dof 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. Whu .*pi+kx/-ml edyw(zen viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caus/xy(pz .*dk+uie-ml wed by this current, inside the loop? The magnetic field

  The SI unit of magnetic 7l ,sc5eaojq54-jitq field is the

  1 T is equivalent to 1qzv;rnj*qg+8kc-d-ku ,)l*o pcwp c

  The direction of the force on a current-carrying wire in a magnxijmp,j k3bfi lz os82+s.;b,etic field is described by which of the f ;3jx p,+bss2i.f,j8mk oblz iollowing?

  The force on a current-carrying wire in a magnetic field is the strongest8ky275tdx (v+dsrx v k when

  The force on a current-carrying wire in a magnete1m0dyv dc7wlqhnq*-1xu6 ib . geg,)ic field is equal to zero when

  A vertical wire carries a cur 6v7ox(aju:m/4a ud sqrent straight up in a region where the magnetic field vector points due north. What is the direction of the resulti( 7v4a:dq uxsj a/mou6ng force on this current?

  A charged particle moves and experiencejgf67 pmjd+x ly/:m lb3b;nl3s no magnetic force. From this we can conclude thaj +;xfd b3l:ymmgjl3lp76 n/ bt

  A charged particle moves with a constant spee cz 08ie: :(yior0in39tsqs ied through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force actingq:y9: 00i3 ceit (rno8seiiz s on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The m)pqp c bftq2xl zi+m k*9+i15fai* n.wagnetic force on this particleq)5cq.2*ta k*iifpx+z 1+ pbfm9nwli

  A charged particle is injected into a uniform magnetic f*oet8 f )v/) umq x(abc+6pvbtield such that its velocity vector is perpendicular to the ma(qa uc) p*btf6v+b v/mo xe)t8gnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a unifo- z3 uvdnt;i j4tw,,fxrm magnetic field. If the particle had been trav fj,t t,w;z4dn-x3 ivueling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path inux 4o8ujc dfm: --sv-i a uniform magnetic xo8 s: djm f--uuci4v-field. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an el3u yn2kwm ;-:fqi1a y(ufdq8u)5ute0y-fg vcectron moves eastward at speed V in a uniform magnetic field that iswqcgff-fmv 5(8tu3ue; yi)0-nu2 :uy1yadkq directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obser6igms;sxc: ns-7it ,u ved to curve upward as the result of a magnetic field. The direction of thsix 6:s s7gc;-iu mt,ne magnetic field is

  An electron moving along the +x axis entvw(xt dp:5s(t1g )ajjers a region where there is a uniform magneti 5t) ax1wsp:jvdg ((jtc 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 longa+7hmasuegbbkrq37089qp l+ f 8 rv efj22oc: straight current-carrying wire is

  At double the distance from a long cx +tzirk iyadgaw7,z7;49)rc urrent-carrying wire, the strength of the magnetic field p7rz+ 9aywt 4i zc;raxgd,k i)7roduced by that wire decreases to

  Two long parallel wires placed side-by-side ,g2tj8*jk t t)owklu;on a horizontal table carry identical size currents in opposite directions. The wire on your righ)tjkk; wjg,oul2t8* tt 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 carnk oxq:+q5mag:ounyoj34w );w o- lv8 ry identical current straight toward you. From your point of view, the magnetic field at4)yvq-oumxgoo; 5q3 w8+::wnaon kl j the point exactly between the two wires

  Two long parallel wires carry equal cur3ru kly/r( m*4gfyt6wrents. The magnitude of the force between the wires is F. The current in each wire is now doubled. Wh4wutr *yyr g /mfl3(6kat is the magnitude of the new force between the two wires?

  A long straight wire carx7on,)-l t1ahy/1znd r4ukr b ries current toward the east. A proton moves toward the east alongu,rhl1-nbk/4ortyn17 d axz)side and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the planeg b0 q2hw.k7li;3wl 3toyd mt: of the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an etmo 7hgylkq:.t dw 3i;0l3b2wlectron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-bymf m eu:4hn8pwmv;a+2 -side on a horizontal table. If the wires carry current in the sfa2 m4vnp wmeum;h8+: ame direction,

  Two long parallel wires are placed side-by-side on a horizontal ta4xudw 4 a2sro(gz a/lid4i77p t92xowble. If the wires carryli2xp 49tow7r4ds2 ug da/ w(xai4z7o current in opposite directions,

  Consider two current-carrying circular loops. Both are made from oej; r/ q8g hxi25px7uone strand of wire / p7hrxuxq2eig;o8 5jand 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 center of the larger loop is

  Consider two current-carrying circular loops. Both are me5 n9 0(job6ycuc(v szade from one strand of wire and both carry the same current, but one has twice the radius of t5ncsycz6v o9( jbue(0he other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a cura zbnah;71pcgjf/6li 5gwb3*rent carrying loop occurs when the angle between the loop's m nz6 aapfj wgc1b7 ;/*5hibg3lagnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that iz. bxy) jh4ym9s free to rotate in any direction will experihy9.mzj 4 bx)yence a torque until its magnetic moment vector

  What fundamental fact underlies the operat:d. ssjik0n x1i1d8v pion of essentially all electric motors? 0 81vk1.s ijpxsdnid:

  A circular wire loop lies in a horizoe:1kh1k rus1a1 t d0ygamf,thz8/.e fntal plane on a table and carries current in a cousk f/:ez1. 0ym thkahrt1 eug,1 a8df1nterclockwise 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 charge .s,:lwn ih*co q is 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, q, V,. :oshwcli* n, and R.

  A velocity selector consists of a charged particle yf/v hg5j, -pxs /v.ozpassing through crossed electric and magnetic fields. v5 jsg- hov, x/y/f.pz 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 curreavds3 4b-wqd6o p2h+gri1y w/nt of 0.60 A is oriented parallel to a uniform magnetic a2rypd/g+ h4wi-3w6q b1odvs field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction ofzu5xh z 97ii-s $30^{\circ}$ 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 mn1d.oj y x.epj1d ys8*eter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle of ..1ye *1pjx ddn so8jy$27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m lyr4np9ne 1*2f mia/k 5v(s cgaong has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum curr2 knap 45rcsa1v/9f*(y neigment in the rod 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. v2.hq +dps s/g What is the magnitude of the magnetic force on t.+qg/ vdsshp 2he 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 6lx0 zka(f1 mds 04efa kv,;rha 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 spbqt52 q0 z 70s 0ilv9szy:hdvleed 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 d3ulxk6w2z*f* v4dzvpue 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 spea0wwm2 sq2 sa94:oi aued 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 spx 0kpy:x+(ywreed 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 ddmv hspd/kf(9.-i)3e rwe+gof $3.0 \times 10^6 \; m/s$ 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 carrie (oi1+ gb p:baqa3rx.ps a current of 25 A. What is the magnitude of the magnetic field at a disxq1a3(.gbb p+aro :ip tance of 0.15 m from the wire?

  A high power line carryi sf- 9cblrqhx0u-c1 v)ng 1000 A generates what magnetic field at the ground, 10 m -9 xrqv-ls)hbc01fcu away?

  How much current must flow folk 7 wg9ufokvc2hby. ./1wkz g h21r9jr $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current o7-c+ *pq 1lcvbd g4slxf 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Ecld7* glv4cq bs1+p -xarth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. They ar8ocbct*af gyusv: 44 2e separated 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 o8gb4 :soy2tucfv a 4*cther?

  Two long parallel wires carry currents of 20 A anaxrxw +thh)3nytj.n3/++ p hcd 5.0 A in opposite directions. The wires are separated by 0.2c +x3h/hhpx+ty+tjn3 nr.w a )0 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in oppo/slx woam;1* asite directions. The wires are separated by 0.20 m. At xam*; /al1sowwhat point between the two wires are the contributions from the two wires the same?

  Four long parallel wires (pqdxx q +pnwq4(//hr 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 (q//pqq r+w x(npxd 4hpositioned 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 kkj,( jncx9+(yuiwyxk-1jy, of 5.0 A and 8.0 A in the opposite direction. The wires are se(yu,19k kxw,y(k jy +cnx-jjiparated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic 6th9;g(gpm- l9f wa.xzpyn ghp ai)-qujs,59 field at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A p zmw6.a5t pgs9 qu9ph)yfx- ji hn,;ggl(a-9 flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetipd4x/foe 5qg j9zn6 v1y/x4eac field is produced at the center of the solenoid when a cur1//oag4p94ed y6 vn zqefj5x xrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. What pwl- 3*)qkq 4hvlg3-qfz dtz;strength of magnetic field will it hav3dv*qz-ktpq ;f z4qgw- hl l)3e at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a fh 6vrnxcp r69bc;1z (1.0-T magnetic field at the center6 pc6xcb 9fvrz(r1h;n?

  How many turns should a ( 0qwspn2) 3 ht cfq+,umvtnf110-cm long solenoid 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 recta*uojn8a39 )q girorvx; ni8r*ngular loop of 120 turns that carries 6.0 A if its dimensir*uqixng;8rao )n9r ij o8*3vons are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of tl5pu65av9hy t6:i8g fa(h:auma i:d0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to igy (6 ad5 :6a5: hv9ml:utpfa8 tuhiathe magnetic field?

  A circular loop of wire of cross-sectc g(9om ) 8y:pnrchah9ional 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 Te(9 u*euhv; xb. The loop has an area of h* b9xu(eev;u$0.12 \; m^{2}$ 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 r mpp47m5 o;fhsadius 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 parallp;p4mf7 hsm5 oel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 ,zsi d97zjv/kf:ro7 -a .fj c 2wdb6ogT. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magneta 6f7o 2-ifvojd7sj.kwcr9:d, zg/ zbic field?

  A circular wire loop of aremrtsufrb/ u-(/ j vs9 x fn;h4p8c4tc+a $0.25 \; m^{2}$ 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, apxcn;non- (47o) j poj 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 with velocity zw8k o4 k34iph.)mi1hnxinr7)ko vo6 $6.9 \times 10^6 \; m/s$ 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 mo:mr (ue1o/ c/v*xwxaw ves into a magnetic field of 0.040 T. What is the radiowv:*r( 1e/mw x/uc axus of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It ex z5w qk te)xby-(di1.nters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine thdyxz)-q(w 51kbie .xt e radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV bdqrxct3 p jslhpd::35*0kv9before 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 retvrbk*dq:3l359 d :schxp j p0quired if the particles are to be undeflected?