If the north poles of two bar magnets are brought close to each other, thlv; g 8hc6n;n 6a1w:fjh dv8hwe magnets willfdw8n6vvw6ahlh;8g c ;nhj 1:

  If the south pole of one bar magnet is brought near thaf6klatp. 3ozs(1xj kf5 :ta(e north pole of a second bar magne1t(ol3fkf6a .(a5s:xtzpjk at, the two magnets will

  If a bar magnet is divided into two equal p jn1t/ph,irt+ieces,

  The Earth's geographic North Pole is mapehg1* rb7db6gnetically a

  The south pole of a magnet points toward the Eg znla24 h)g7ks2v 2wharth's

  An electric current prod*p va km.o(l9wds z/o-9a1h uluces

  Which of the following is co/ai*5d,3y:d,isruxxxag6q 9 e 1d b vtrrect?

  A vertical wire carries a current straight down. To the east of this wwd sons/ 7-3pmire, the magnetic fo s/s73npw-m dield points

  A horizontal wire carries a current straight towav7m*+qal+ lw+bqvxn (rd you. From your point of view, the magnetic field caused by thiqa7ml + vv(*x+nblw+ qs current

  A current carrying loop of wire lies flat on a table top. When viewed fromqk ,o a ngpi:fe8pz;y))j (udqn0:nz+ above, the current moves around the loop in a )y(p joaef0k8:, n zzd+)qu: ;pgqnnicounterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop ,he+wjms /fq:xs b(r2 of wire lies flat on a table top. When viewed from above, the current mofm/j s( hsqe2 b+,wxr:ves 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 magneba66zs a8 e u6ul8c9qa4 -y rhzmcgj 6meo;i1+tic field is the

  1 T is equivalent tok1b3v u;te;jjhzdb3 f x9 s72c

  The direction of the force on a current-carrying wire in a magnezlbzz*9(lvd 7tic field is described by which b(7vzd l*zz9 lof the following?

  The force on a current-carryi3w; vspwncf7h;mw5xx r5 ;n 34y8 pkgbng wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is e4;(fex1(giujp yiw+ qqual to zero when

  A vertical wire carries a current straight up in a region where the ms0b h28xmtw (aagnetic field vector points due north. What i0s2tbxwh( 8 ams the direction of the resulting force on this current?

  A charged particle moves and experiences no magn: viid6ok ztrr-abx7,( ;ruz5 etic force. From this we can conclude thakzxt z;( r5bi,ri6r: vo 7-udat

  A charged particle moves with a constant speed through a regionlh p86*4( u oo;( jxzhakq+1w;a.i1ik ppogaa where a uniform magnetic field is present. If the magnetic field points straight uppuaphawik4k p; o61o(x ;*+aj gqloi8z.ha( 1ward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magns6*gj2lvkwon9o.4ja etic force on this part4nal j wokj.s*29ov6 gicle

  A charged particle is injected into a uniform magneexh.u6 uf- li /zzjvt .9py/oq:mn.k+tic field such that its velocit.nuve .z-m xjty /fu9. q6/:+zoiphkl y vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path inki ab pnbni7hj0::c ,6 a uniform magnetic field. If the particle had been traveling bki p:h6:j,n70i cnab twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path v78dly yix*vjm(- nb53o d6gbin a uniform magnetic field. l mbv *yy dvo igb36nd-5x78j( If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at sp+7k r:p*owaod8 e qa86un n vz*mwv.g7:5g xdjeed V in a uniform magnetic field that is directed straight downward. Tand6vom 7deq xv857gkz: wu gn j+r8ao: .*wp*he magnetic force that acts on it is

  An electron has an initial velocita 3a w/m+oq3y cpzqqr 5,lf7x4y to the south but is observed to curve upward as the result of a maglw/o5p m qz3q+rac3 x7aqfy,4 netic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region wujv)+53h np x6pggtb)sxy: o* here there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to r6 u*g3hy)x)b5:t+pojp vngxsight, +y up, and +z out of the page.)

  The magnetic field prx54v r sely-6noduced by a long straight current-carrying wire is

  At double the distance from a long current-car ampld3e ybf*s/day5e.q066f rying wire, the strength of the magnetic field pry/3a*mqe6 f 6d. bpy0esdfla5oduced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizonti-pu* 3aq, vu6ta-caw al table carry identical size currents in 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 o i-3patc wv*6 a,quu-af 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 ct2loq l)m4j)+6f c2tplhk:iu arry identical current straight towarpi f)l6m2h4j +)t ull2q:cktod you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betguz 9-,isjb5(x 1,lirmw4z kqween the wires is F. The current in each wire is now douig q1is4 b5rwzm,(,u lkz-9xjbled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the eas*6 ietfl1s-l nv9 pc.wx)pu5gt. A proton moves toward the east alongside9npfsp1)xv 6l 5tci-g.elw*u and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plan)bfrrxq u 5y3w4w9p c9e of the 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 wuqf45b3r ryc9w )xp9page, from your right?

  Two long parallel wires. l6g hse.(0th7zsmfn are placed side-by-side on a horizontal table. If the wires carr6g(7ntz hsmsehl 0. f.y current in the same direction,

  Two long parallel wires are placed sibj)n-n 0oz-2si )vhl bc3g5cb/i w1ulde-by-side on a horizontal table. If the wires carry current in opposite directiozlsb)w3-1/-c n25 guliihonb b0jc )v ns,

  Consider two current-carrying circular lomkh)mp nc*octa)1; 2mw lgk64f( ih)rops. Both are made from one strand of wire and both carry the same current, but one has twicea*np;2l)cmrf)6t chmg ()k k41 i mowh 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 ojd:,ne3afk2e :54kgdsitk r0ne 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 magnet 4ndf:2g3 ,kad5 jrsk:ke0 eitic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the 6g8: j8coj. hyqw1)bqizo z2oangle between the loop's magnetic moment and the magneticw6coyq 2gj b)q8zho 8i j.:1zo field vector is

  When placed askew in a magnetic field, a current carrying lotox87 w76 212 qs*luod +onvugaw3fziop that is free to rotg18 onu tl76wwosvdi72qo2ua* + zf3xate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact under1s kwpfhxsu/v43 hmmj) ++ i5jlies the operation of essentially all electric motorsh)mp34 +f/kis 5hjm1 xjs wuv+?

  A circular wire loop lies in a horizont3qj( d+z evm(9mn qm4dal plane on a table 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. Whichd+zv3j (qdm mme n(q94 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 throd7 kpdg q.+z2tslz*0bugh 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 ibk+zzlp 0*7t. 2 qsgdds 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 throhro*b7c5l-4tr5(b3dx vf suw( n-cdi ugh 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 dr sh-c4-(xiuor3*dbw 7(cnb ftv55 l 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 rfj-6isrp, -w oriented parallel to a uniform magneti swr pj6--r,ifc field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of ,p6o j c/j.o(xzi6sjl9z j/t e10 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 w7tk : hpr3spjrs5b. yheixpr6)-o3: yire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes ant ss- rh k3 :y.6p5prbiyrxo pj7:)h3e angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of sper4 b,db :.hrju 9:d0.050 kg and is in a magnetic field of 4d eb phs:j9ubr:rd,.0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton isor.y3tu/aau/ 3xg; el m-e7art m8l*x in a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the proto3uxm -te / /x.ur; tr7go83ayl* malean?

  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 wittggr e9vo7mrxhvt1 9 7kh9d,7h 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 .uas or gx:h,yb+ w+;a1n1fhol-dqv2a speed 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 north with speedmi;8;lx g 5hz5 asyrz+ $4.0 \times 10^5 \; m/s$ 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 ,jjvv me/hr vc:p0,0ka 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 wir4pmi 9 1lx5kuwazxn f52 ;2enth 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 acceleration of the electron.

  A proton has a speed of3 08ry e6 ufhhmbuj.4k $3.0 \times 10^6 \; m/s$ 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 magnitude of td1dw2jby/06hkk9uo /l towg:ee /g7phe magnwgbdg/jeow1l2/ke7h/ p td 609u:kyo etic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what man0(/f6sm rrzq/e: u vbgnetic field at the ground, 10 ev q(f0 r6bru//sn: mzm away?

  How much current must flow fo(m vf:nk f9d,nr $1.0 \times 10^{-3} \; T$ 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 th.xjfo7h, jas uu289r he magnitude of the magnetic field due to the wire equal to the strength of the E2x9os7 f8u j.hua ,jrharth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry cux qgl +d93njb2n+cp0p rrents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm fromp+gx+bc pnq0 9 n3jld2 one wire and 60 cm from the other?

  Two long parallel wires cao;d ssj jkxq5.pxy8 d 2mt8p,4rry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is tj sxt.85 2xp ;pdyk4djqsm ,o8he magnetic field midway between the two wires?

  Two long parallel wires cas x.h k,cg8(usrry currents of 20 A and 5.0 A in opposite directions. The wi 8gus.,c(xhskres are 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 each carry 2.0 A in the same0c-2q p4e;jyxivbfar :r)*mu direction. They are parallel to the z-axis, and they pass through the corners of a square ofb:pym uf0;e)2 vr4cr* xjaiq- 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 8.0oj98*06f u v9bxa+ ymsd n ;y3qsj8czn A in the opposite direction. The wires are sepaxc8ny *0 8q9 myb3;6uz+j9vsfasod jnrated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the cenb8 y(qh.x6rrq ter of a circular loop of wire of radius 4.0 cm wrqx.h( 6b qy8rhen a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. -b)k2 v)kiwfpn)y c 4vWhat magnetic field is produced at tbnfwv24kp)v ) )-cyi khe center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is yxqn)d1i m+.t6 dtvbcsv;- /:o ir6xh0.10 m long and carries a current of 4.0 A. What strength of magnetic fie 1sd+vyc.)ho6 ibxv i6 tdq;tnrmx /-:ld will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long tl).bwulkla9i7 w) d 6yo generate a 1.0-T magnetic field at thewl6.y ) aubwll)79ikd center?

  How many turns should a 10-cm long solenoid have if it is to wcdo5 5n0y1iq generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of pukmk0u;7ot5h dd -i fifh47/a rectangular loop of 120 turns that carries 6.0 A if its dimensions i pdo4-hu5th 7if/;m0f 7ukdkare 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 l/clni 9ttu05s+ch v+ 3r6oth4 s;dxam 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 perpendicltt+x h5 v/cdr9a6+;nc 43u iots shl0ular to the magnetic field?

  A circular loop of wire of cross-sectionazo . v6rj,2fenl 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 curre;ulxn2f( 5ycu+grz d 2e 2,hient of 2.0 A is in a magnetic field of 3.5 T. The loop has2 5iz2ye,;uecgh+xudnfl r 2( 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 oky37: i+mjmbl f 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 tbljk3 y+m7mi:he magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50iom4 q f k20+vy;r0mjm,t ab;r m is in a uniform magnetic field of 0.30 T. The current in thv m0 qy m+,abmjk4r;fr 20oit;e 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 loop9p2i/+63ir s, ara ocpry3 acp 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 (charge e) ha9p hw) 2bbgcuni9j 7w/s 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 v2 jg:ocx0 . zyrik,m6belocity $6.9 \times 10^6 \; m/s$ 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 ma dd6+:gd +i s2lizmyue(xa:p- gnetic field of 0.040 T. What is the radius of the protidiz(s2+le u amxy-:d p:+6dg on's resulting orbit?

  A proton is accelerated from rest throuoi;mr 28v-u r6ohts1egh 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its dirv isuerm;8o16- 2rtoh ection of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated thrx6r; p329mzyss hyj,20 uaias fxok.m ,pr7e5ough a potential 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 valu0a y7,i ;fpkr m.3 hsomr pxzyex2 2,a5ss6uj9e of the E-field is required if the particles are to be undeflected?