If the north poles of two bar magnets are brought close to each other, 8pmsy,o-( jtwthe magnets wp,y8m-w jt(os ill

  If the south pole of onjc;b/l qi.3pe)29r:itqbv2orke wpg + 7ob t4e bar magnet is brought near the north pole of a second bar ma2:b+ 4 iv teqpgb./iqjrr3 e; wb97k )too2pclgnet, the two magnets will

  If a bar magnet is divitq dhapa9 q pf,5r ,28cil-8hsded into two equal pieces,

  The Earth's geographic North Pole is magr;:*ym1cqllc it (m j*netically a

  The south pole of a magnet po* j0la m-vc,/tlvi/jp ints toward the Earth's

  An electric current prodzw 0w ivfis0 )nie97ott6-7o kuces

  Which of the following is corre hpu *f(8is0mkct?

  A vertical wire carries a current straight down. T*q 1msiil4swql ok0 j wam/8c-t)c.y; o the east of this wire, the magnetic field p8 j m*lc0ymo qsli -sca.4t;qw/)wk1ioints

  A horizontal wire carpqicaui*+( v( w ph*t7ries a current straight toward you. From your point of view, the magnetic field awuv h +q p7cp((**iitcaused by this current

  A current carrying loop of wi x +hc8cfp8h5wre lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the directif8 8 5hxpwh+ccon of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circul2q dl8c+3l6qls,8qr2c u nxcefli -f .ar loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What isnxl+ lq,u2i d .3fc6c8 q8f-2lqcerls the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is thm kckhjczz vi+r,w)r :2k+q47e

  1 T is equivalent toj9f z 7pnr asg15t1quy7*i3woc u5cz1jt6r i1

  The direction of the force on a current-carrying wire in a magneticbdhv t-.;xeo 0 field is described;t 0de.h-ox vb by which of the following?

  The force on a current-carryiv uwobdtz* p qp r1s87xla0,j5z83* ssng wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero w-27uskaxul;bioe5dj t ji;t .iw 30-yhen

  A vertical wire carries a current straight up in a region where the magnet 9/koc69,d 6ofhzm.1pw eo ;ekaelyy6ic field vector points due north. What is the direction of the resulting focko epef1kw 6ym,oy9/zd; h66a9. ol erce on this current?

  A charged particle moves and experiences no magnetic force. From tp+-:w0: m bsxpk ttw.*8 n*0v.kws uuggnes 3dhis we can conclude*m ss.ngs0* d3:g 80vb:wk-kut+p.w nut wpx e that

  A charged particle moves with a constant speed through a region where a(5,lp ns njr627wjs as uniform magnetic field is pnw(ss p5aj 6s2njrl,7resent. If the 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. The mb6j a1ih90b8h 0lyikfagnetic force on thish9i016bb0jylafh k i8 particle

  A charged particle is injected into a uniform magnetic field su)b0m cv/ +rmxoch that its velocity vector is perpendicular to the mbvrm 0+xoc/) magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observen0l.5vg ekuaddn /,m 1d traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of ldavg,n01 5u /kn.demthe circular path would be

  A particle carrying a charge op c4x7 nr** woaoqd62nf +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circula2rc7d* oa4p on wnqx*6r path would have been

  At a particular instant, an electron movesxq bz.z).)sq+ zpzw:t eastward at speed V in a uniform magnetic fiel zxp:w.)) szt.bqq +zzd that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but ibe,zvtl; .s;k*k3q sqwr5 h0ss observed to curve upward as the result of a mas*hq;; sk l,tbv.3ws0q er5 kzgnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a regio ;. kbzg ;qsov5km*d9on where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? ; dosq5.g v;ok9*mzkb(+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight currenzdxju:i a /,j2t-carrying wire is

  At double the distance from a long current-carrying w6enx aw u1m1u:l 4naw5;az :hwire, the strength of the magnetic mzn x ew 5nw11a::u6u;lha w4afield produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry idecyt.+raxjzq u i.,(; entical size currents in opposite directions. The wire otx uzr qyia;.(e+,.j cn 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 caain xyl6f-i ku+a;j39 rry identical current straight toward you. From your point of view, the magnetic 6yx al ka-;j3f niu9i+field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betweevuj/( 7ct7qt1(bijyt i(tt7 /jjqv (u1btyc7 n the 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 current toward the east. A proton moves towardlfw95m vpga)hj l s(;0 the east alongside and just south of the wire. What is tp95jv h(agms llf0w;)he direction of the force on the proton?

  A wire lying in the plane of the page carries a k,iq :j1t3vj icurrent toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward jii :qt31, vkjthe wire, also in the plane of the page, from your right?

  Two long parallel wires are pladqos s 2;n oms ic*8:xlt99v6aced side-by-side on a horizontal table. If the wires ca: qc;28 9ss6 an*9tolvdimosx rry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontahp+j)*+a2dib; xy9mpals st/ l table. If the wires carry current in opposite dire b+*9dp l 2xmy)tsasap;j/h+ ictions,

  Consider two current-carrying circular loops. Both are made from one strand of qymmz(sjnoom;x8 ln8/,g- 5h wire and both carry the same current, but one has l yhz,o/-qmon ;s8mxgmn 5(j 8twice 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 ar u;zzdhv-6u ;we 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 moment of the smaller loop, the magneticuwh6;z; v-z du moment of the larger loop is

  The maximum torque on a current carryinp,xx s.6dmh ,yg loop occurs when the angle between the loop's magnetic moment . ,6,hxsdpyxm and the magnetic field vector is

  When placed askew in (gk rjk 0qz8db2+i6ku: 7oqqsa magnetic field, a current carrying loop that is free to rotate in any directionob( k 0si:q8uqqjkzgd+26 k7 r will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all eli9+zgdsp 9v: rcp( bji(y*h np s)*ke;ectric motors?vnzye (;i)hp9*sj b+gp9(:sk prd* ic

  A circular wire loop lies in a horizontal plane on a tabfx6a3 ux1xf/3qdcd6b06hqer le and 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 ofu1rf 6xqx0ef/3 d6 cdaqxbh36 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 accelerat,lr.z+ten*es ed through a potential difference V and allowed to enter a magnetic field B, where it is deflected +e*lnst.,e r zin 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 ch2. ysi tyqf.2h8uh6 sdarged particle passing through crossed electric and magnetic fields. The fors 68 2hhqy.fi tdy.su2ces 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 current of 0.60 A is org fpjmye ms1n 5z5/b4 4-*wotiiented parallel to a uniform magnetic field 1mswo45bynzgi5m* / t4f-e pj of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dx(c+, wvyxr)hirection 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 wh.:9n0 wywttq) tl nh)e9 g4t)lowh 6cuen it is placed in a magnetic field of 0.020 T? The wire makes an ang6wqyew9nt))9gthc 4n: tw 0htl )lo.ule of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has asdpq qg, iu )dgz9(e( vhti*a6c2t.v0 mass 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 the magnetic force to cancelcega d2 h(g )06ipsu*dq,vv (t9.iz qt the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 Tfez3,u8pb *u t. What is the magnitude of the magnetic fozt b*p 3ufeu,8rce 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 aw3rosgnqyfzb4/ 7( (w6n3j y 3yp0 thp 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 speleatcmq uslp; cm+ 1+oe5 b3(-7dbs4aed 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 travelingwutz.fip(f 65 6*yjzm due 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 speb /4gf n)zx1ekjo(h, ded 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 spe* : wqai(k5cdced 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 o66cp0nxwuz wfogz :8+f $3.0 \times 10^6 \; m/s$ 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 is the m1o2bxe, 2 gfgt-azb c)agnitude of the magnetic fielt1,o ba)bzfxg2 -ge2c d at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what ma-dbqao c.3 qkd2hk imttz*i,3 ;sef85gnetic field at the ground, 10 m away5at3 *qsq;ki.-ft,23h 8zmk deod bci?

  How much current must floj i(yzpqzve)( 6zua cb8)0 h5yv6 7nepw for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long 5sx2yhi7quba0 ) jht;+znz-1 uyz6etstraight wire carrying a current of 5.0 A is the magnitude of the magnetic field iz by )s-enh10 tuz+h6x;5uz2yqat j7due 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 directions. 36cd( qozwto, They are 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 th,3ctoz(wq6od e other?

  Two long parallel wires gu(um k-a op63 idu*1mcarry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic f- mgi*3p6ak u1u( umdoield midway between the two wires?

  Two long parallel wires carry currents ofiqgkqs( u*o3c5frv0y zw)54 s 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 from the two wires 5o*i34 gz)(sr fqs5 cv0kwuyqthe same?

  Four long parallel wires each carry 2.0 A wi7m dg:h /3(m/i4aqv lzv7m4nu j i-lin 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 magnemw4d gmz-l 73/u/4:lah niqvmi jiv7(tic 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 in the opposite dir)ql 95c8e 8bfw16gflimwd7 apj: qn4g ection. The wires are separated by 0.30 c 1m:9ngwjg4 57 wqle8 pfal6id)qb8fm. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of ; ui+s;clua1qbr 1 r.kwire of radius 4.0 cm when a current of 2.0 A flows in the ;k rib.as +11 uqrc;luwire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field isprq:rt*f)czq* 12jko produced at the center of the solenoid )r*cz1ptq *kq rfjo :2when a current of 10 A flows?

  A solenoid with 500 tur+y qu ay3yghbls4 g6v)zf15 m3ns is 0.10 m long and carries a current of 4.0 A. What strength of magneticy zymq4b3 vl)1f u35h 6ayggs+ field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 c nym4(x8qt o05i:jl czm long to generate a 1.0-T magnc(y imtz0n58 4 lj:oqxetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to gener 6 mr 9ggzykix21u1wf+ (9fcnzate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a r/-3vtscqm auc j+s7w :ectangular loop of 120 turns that carries 6.0 A if its dq v:+scut7 / wa3sc-jmimensions 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 0estqxispf/ (v1i7s :: .30 T. The current in the loop is 2.0 A. What is the magnetic torque when tes x s(/1:vi :7qtispfhe plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional aw4fj/afe1bq0rs8w4 n rea $0.12 \; m^{2}$ 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 curre; nu1l.pd6hk xnt of 2.0 A is in a magnetic field of 3.5 T. The loop has an area6d.knp;u lh x1 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+r+ zpf pe u-q+q.9ugh 0.30 T. The current in pg9u eq .+r+pu+fqzh-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 wire of radius 0.50 m is in a uniform m11 8eu-goggr bagnetic 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 marge ou18g1 b-ggnetic field?

  A circular wire loop of area:*:1kwmjln kk sa)mc, $0.25 \; m^{2}$ 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 (ch(x5 iy0p(cu aarj *6vgarge 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 6y(pvsfrx,q- with 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 into a:xejmc-7)j h w magnetic field of 0.040 T. What is the radius of the proton's resultinc)wej-7xh jm:g orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field of) 4r0gnp0i wf(kdqcsu 0 i4sq+d5 v5vv 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the padwnrq f igu(c5v44sisk0 05p)0v+v qdth it follows.

  A beam of electrons is accelerated through a potential differen2 oa0whf pj9z3h;czp ;ce 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 the0ah f p3pz92zh;j;woc particles are to be undeflected?