If the north poles of two b*g gclt3 phf /tpzu0-h/ )c)laar magnets are brought close to each other, the magnets c l 0fahup-3)t pgt/ zgl/c)*hwill

  If the south pole of one se4*gsg* eg)r bar magnet is brought near the north pole of a second bar magn*s4*r)ggse ge et, the two magnets will

  If a bar magnet is dividth mty8 21p1need into two equal pieces,

  The Earth's geographic North Poleg+3*,duontjh6 :,bl urf0 ozs is magnetically a

  The south pole of a mwpm 0+cn1y6e gich-e8agnet points toward the Earth's

  An electric current producot5*c98o4jyhq/ svkd es

  Which of the following is corrm 7l*;cxo,t csect?

  A vertical wire carries a current straight down. To*+xs8xkyjt a5 2u 1c-y9bixg ba5nsx) the east of this wire, the mx5sag*ya +)x ij1 -bbxsnt5ku29y xc8agnetic field points

  A horizontal wire carries a current straight toward you. From your point of b;otxp2rq/g f*b q45d view, the m*;r b5q2/4dgo xpbftqagnetic field caused by this current

  A current carrying loop of wire lies flat adh0ejc +2cidgr3t 06 on a table top. When viewed from above, 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 fi+cgit r he32d0 d0ajc6eld

  A current carrying circular loop o u*703liz5oeovjxfg 1 2o3ixjf wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the7gx0*e fiuxlz jjo o32 3v15io direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic0mo;)/r djzo n field is the

  1 T is equivalent to/)pzoyas6 )i q,e jb)m

  The direction of the force on a current-carrying wire iuspk-h .s:+ jkn a magnetic field is described by which of k-u+ hps.j :skthe following?

  The force on a current-carrying wire in a magnetic field 5tx ,vwiqb+q4,x+ usm is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero whf9ie/du 1i0dfen

  A vertical wire carries a current straight up in a region where 1cgx :z*lrs1 mthe magnetic field vecto 1g*:xszmr1c lr points due north. What is the direction of the resulting force on this current?

  A charged particle moves ak5ql;z2qn)nw h0j c yz. xruw2;pxf43 nd experiences no magnetic force. From this we can conclude that.qlz fnp; x52h302)quk w;xwz 4 rcjny

  A charged particle moves /ywgbfqv +yr/* l w0:zcjk9-fwith a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetif*r/b0f+ :zwlcw9-qyj k/y vgc force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic forcengs8i 59o,q qu on uso, g9qinq58 this particle

  A charged particle is injected into a uniform magnetj0ksc ,sj6(x pic field such that its velocity vector is perpendicular to the magnetic fi,j 0sj6( cxpkseld vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in 1; su1n+s;fmccm3 ,pjqi,dv la circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius1d lpn3jqsu1i m,c +,m;v fc;s of the circular path would be

  A particle carrying a charge of +e travels in a circu/fx,pvrgo, 24zcv4 hmfc.zi:lar path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the,vc :4fx/p2z .oizcrh,f4vgm circular path would have been

  At a particular instant, an ele,bom,: ztcn)jctron moves eastward at speed V in a uniform magnetic field that is directed straight downward.)on z:cm,,j tb The magnetic force that acts on it is

  An electron has an initial velocity to the south but isg+a 2zq k q ;w2mjl/oq5zw)/qm observed to curve upward as the result of a magnetic field. The direction of the magnetic 5/k/qja )m + z2ql;qmgo ww2qzfield is

  An electron moving along the +x axis enters a region where there is a uc z tf6orv*k,/niform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? f6r,/k*t ozvc (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying wirni(0a/obh7j4gi h: ule is

  At double the distance from a long current-carrying wire, the strength of the t* c480cvhn(gdr(2 :o pkl oenmagnetic field produced by that wire decreases to*(t k 8lg op(2cedvrh4c:n0no

  Two long parallel wires placed side-by-side on a horizontal tabli**8 qc u0/sfbm* zivfe carry identical size currents in opposite directions. The wire on your right cafvszb *i/0u *iq*fm8c rries 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 wirelk2j*k le 4;ku(fus )cs placed side-by-side on a horizontal table carry identical currenteuuc )(;kk2ls *kfj4l straight toward 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 fw5yieebcb(*u ih x 21az-u6o 8orce between the wires is F. The current h y2bx81u6 (eui ai*oeb 5zw-cin each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the2zwkqc9pzkc0fwdhdo,ld m2 / t.* bo(e(* 3in east. A proton moves toward the east alongside and just south of the wire. What is the directionnoic2l ,mzhz(fdet23q *w9 kd0*.pbw c(k/do of the force on the proton?

  A wire lying in the plane of the page carr p/e qexa+v5n3ies a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perp/ qx5pvne+a 3eendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a hc j2vdyec 2u(xv+uh2x2gr.n;orizontal table. If the whcjucv;gxrxe. uv22yd(2 + 2nires carry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. ybwv t /oo(jv)tz, f0ht*3o8h(yfwc * If the w *f*c(h8 tw0)ow yjoyhfvz/b 3tt,ov(ires carry current in opposite directions,

  Consider two current-carrying circular loops. Both are hl4 :s m.j7om.rlwar -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 center of the larger loopsl o j:rra7.4hm-mw.l is

  Consider two current-carrying circular loops. Both are ma2tk92xtb dfvikl7,p;l wr v/)de 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 small;if2ll ,xk/dk)79r bvt2 tpvwer loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the8tg k*cu)v f3k angle between the loop's magneticcuf) k8 tk3g*v moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free t gu*yy y4.g:;p.eohhjo rotguj. *: hyhygp;ye4o.ate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operatk w. 15r1 gloi9tp5klbion of essentially all electric motors gr9kbiok15p .l1l5tw ?

  A circular wire loop lies i nv+, ,+ v9pfiljvvi9eqhkf s/ bc77p1n a horizontal plane on a table and carries current in a/9f+ v 7vpj+v i1k7,csfliveh9,pb nq 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 torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a partl5*,z-v( zw dpok4vkticle of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular pathzdtvpwk45*-ov ,l k( z 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 charged particle pn8f 2azcp;g 8eassing 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 selector, the particles move toward the east, and the magnetic field is directed to the north. What direction should the electr cn 8e28fza;pgic field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallec9,nmo1 .*tx. 6vighrjl dgu)l to a uniform magn9d lvmxu6j.nc.h g1) tgr,i o*etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a do/nr04 f pbtx5iunu*5zgg8y0irection 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 carryinj rf:1 cvl3/:xj*qa emulq (t8g 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makj8m :ue* 3qrtc/:l v(lja q1xfes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.05ns;(9)g y qv fi. v-dcx9y/a*j.dbo: j3 wmtti0 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 ajyxjy-(o twvvt9qf*./icgn; dm9) .3 ib:sd to cancel the weight of the rod?

  A stationary proton is in a unl ;k5fm 2z cd(t8gwq5miform magnetic field of 0.20 T. What is the magnitudem2mfkwzt g 8c5 q;(ld5 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 withov 9li3mj*p q, 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 sm w/a1*lxav;opeed 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 speebutxl 0k: (ch4d $4.0 \times 10^5 \; m/s$ 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 speed dtfdhm t7p 9.,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 scm5,dwj7; qd g li-il5peed 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 speeda g b(kug(36eh of $3.0 \times 10^6 \; m/s$ 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. Wha0idd5l9+r6x ,b vxbj to ou8i+t is the magnitude of the magnetic 6x8+t905xoodbjlr i d, ibu +vfield at a distance of 0.15 m from the wire?

  A high power line carr)g.6qnibw/ v w : czoc;vr-uc,ying 1000 A generates what magnetic field at the ground, 10 m /nwv zv:6irb.g owuq; cc-c,)away?

  How much current must flow foc tx(,1q:n7hdm juu 1:n kilf*r $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a lofx fptz/8- jm,ng straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of abf8,fj/x mt-pzout $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions.vxp , p8;ub3ethx .q8h 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 the otxb,h 3;8q .8pteh vxpuher?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposiwi*a9o;a8 f ro y :ff*bxxow,pu-)xg0te directions. The wires are separated by 0.20 m. What is the magnetic field -y,xf af)pi9* oxoao8r0wu:*;fbgw xmidway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directio4 d zdt kx bx-t2s6ewf8yk,64hns. The wires are separated by 0.20 m. At what point between the two wires , 82yf64dth4-xe6sbkkxtw zdare the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 ma)r)ak k1a4udib7 r2f,*x: qe gez;kA 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 ubekr:*eakx7m1)r4 )i; za2, q a gkfdmagnetic 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 direob5k, /t:fl;wfl,a 1b* uxn95n np bhmction. The wires are sepanfbh 9,;,pu:nkx 5 a/lbfwlnm5o1t* b rated 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 circulap)wd se/f.5yeu/y 2szidv)+e r loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wirepy/)vis) w y2dsz/defu.+5 ee?

  A solenoid 20 cm long is wound with 5000 turns l o shdzgyg:av0,p+7, of wire. What magnetic field is produced at the cylvps :7 gad,ozhg+, 0enter of the 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. What sba l*f)3 v6pxstrength of*b) a3fsp6lvx magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 46lw+hlrt+ jqn2z(z j0+e2yz b.0 cm long to generate a 1.0-T magnetic fie z0qjzlrj+ b2z+le+6t nyh2(wld at the center?

  How many turns should a 10-cm lon/ r4eut/ nrn0gg 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 magneticj3s2)o/ g -pkkz e5 syhfw:xy( moment of a rectangular loop of 120 turns that carries 6.0 A if its dimenoh5 fw)/z(y y23sk :gs-ex pjksions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is inl4 fxga 0y1fy9 a uniform magnetic field of 0.30 T. The current in 1af gfx4y9ly 0the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wi*d vzj:()h undre of cross-sectional 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 T. z 2/ramsf; z1xThe loza zxr;/1fs2mop 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 racrlfygh5t f-fg:(v6 enwn8 6;j7v6e mdius 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 r5:-7gn86;l f6w ftmcv jf6 hnv geey(parallel to the magnetic field?

  A circular loop of wire of - apxa5v g3d/uradius 0.50 m is in a uniform magnetic field of 0.30 T. The current i5 3gau vd/-axpn 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 of akw h 5*r7/o 2rhjkz5f8d qv a50zu,bqhrea $0.25 \; m^{2}$ 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) hat/ ux/9eavj :* vqz)m/p;rxcd vu-4bd 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 velocim:exm re3bucv:.pr6i0 f,;urty $6.9 \times 10^6 \; m/s$ 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 1.0t,av5m . uu9q4 9)jvp uhncgu6 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's rentc hq4u 6 v,muva)u9jg9 .u5psulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magneticubvfe1x p-v s.i+eag w0ia)-nn94ue2 field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it -iwx20u1eu fenp +-bva4) 9 seivn .agfollows.

  A beam of electrons is accelerated through a potential difference t)abro :8t t6vof 10 kV before entering a ot) tvrat6b8 :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 the particles are to be undeflected?