If the north poles of two bar mpd,;*vi z.yg 3,tqvpmagnets are brought close to each other, the magnetd,p yz,*.gp3v;iv mqt s will

  If the south pole of /v :w1w9inq,iox1tjf one bar magnet is brought near the north pole of a second bar magnet, the two magnetjo:9w qx i1niv tw1,f/s will

  If a bar magnet is divided*gxd .jdfkm0 )sdgb07r*k wx ) into two equal pieces,

  The Earth's geographic North Pole is magneticallynra31yxspu i fa-)) -z a

  The south pole of a magnet points toward the Earth'k ih-y 2(eo2nxdb5:3gopc3;ir * knsks

  An electric current produca7 /k)uzvj on4es

  Which of the followinx.k*e 2glneg6j b52 bcg is correct?

  A vertical wire carries a current straight qh4z3 12xxxmzdown. To the east of this wire, the magnetic fiel1x 3z mhx2qxz4d points

  A horizontal wire carries a current straight toward you. From your point of/ bqo-yzgme, 3 view, the magnetic fi/- egqmoz3,ybeld caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed fro8veyu s9l5:jz*x 2cuqyb( zm lk4)o)k m 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 looplm5 zvq8(u2:yzlyskx *bcuoj9 k)e) 4 ? The magnetic field

  A current carrying circular l 1a /7xitdtn, 3xou3dboop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a co3,xu/x idnoad1tt73b unterclockwise 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 is th9g 27 5wa8ngfu1r kq9gomwxw,h: zc cb*,q6jle

  1 T is equivalent tozi a-.+p;/ud ,59rufc bc lqgj

  The direction of the force on a current-carrying wire in a magnetic field is de, 28rcoevk9ptyq+y h *scribevy,q+29tre kh yc*po8d by which of the following?

  The force on a current-carrying wire in a magnetic field.xkykkr5yil )e (f 6u. is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero ws64nz reg dn8uvn4e0y81vem6 hen

  A vertical wire carries a current straight up n2+t0wt.**s pxj+m 1 uibtzlbin a region where the magnetic fiebz*s m2p* 1n+0wtbj.x+ liu ttld vector points due north. What is the direction of the resulting force on this current?

  A charged particle m t,bwf6wdq7fb(5t 0pboves and experiences no magnetic force. From this we can concl75dq(ft bfw pb,6 bw0tude that

  A charged particle moves with a constant speed throonw1 h (*cljvluozt(k* /)rts707m yvugh 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 maxim (o vkoc*rl utlhyt 0w7mj)1sz(7*vn /um when the particle moves

  A charged particle mc cdxv qgq/(t;t6+w-xoves across a constant magnetic field. The magnetic force on this part txc/q(6;vwq x+dc-tg icle

  A charged particle is injected into a uniform magnetic field susdu my yxd9/nz(rxmc ag. 0 2,y93iss2ch that its velocity vector is perpendicular toidxy 0cxys( zad/sy2 2g99m, 3.u rnsm the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observl+jo0ies; if 3 ch)n8led traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular pa ;c3e+8 nljiso0 fil)hth would be

  A particle carrying a charge of +e travels in a circular 7np 6h;uv2aw :rpjxjiv a)+ g+fvxy()path in a uniform magnetic field. If instead the particle car :v+hg upnpwy(67vxj)2i+jv;) af r xaried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V ijzk nq:l,99zluq-oy2 n a uniform magnetic field that is directed straight downward92-l nul9kz:qy,ozj q. The magnetic force that acts on it is

  An electron has an initial velocity to th/cklcyd u7e1pz(c(bp ul- j).e south but is observed to curve upward as the result of a magnetic field. The directionb(.1e( pk p/c) -cljulu dyz7c of the magnetic field is

  An electron moving along the +x axis enters a region where t6h pigt *;wxidvr*-:there is a uniform magnetic field in t*hwgrix d: vt*6; pi-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 long straightfgco8* vql7ge6 96dc ek 73vwn current-carrying wire is

  At double the distance from a long ch/fxz 5akb)wwdv -. 1;sc fh-dx/ig4d urrent-carrying wire, the strength of the magnetic field produced by that wire dechk4b 5/v-c wg.;wiffdzah-xdsx/ )1d reases to

  Two long parallel wires placed side-by-side on a horizontal table cxy)8c 4k swx d.r*t uw/h.i6bxarry 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 h.t .48r)ik /budxxxww 6ycs *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 carry iden rm qagp13v y*n6;ld10pd3keztical current sm gnk0rpl61a3ez 1d3;pqvy d*traight 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 magnitu 2xzx0o7c p4t wls*-gude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?sz cux72p4w- * lgt0xo

  A long straight wire carries current toward the t29) e u,jq5 vc5robbbeast. A proton moves toward the east alongside and just south of the 5 c q5bebotrb)92,vjuwire. What is the direction of the force on the proton?

  A wire lying in the plane ol-b/me r i6qd9lozt0d5ws qcvkz l(3 m )z+c:1f 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 perpendioql6kl+3wq1 c5 md(:itz r/0bmz 9ed)cl-v zs cularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal table. If tm;2: lww -r0m:3xhaclu,u(mmz j s r:w:rot.n he wires carry current in the same direction,lln mzu-2mr jh:w,rxa( ts;r3o ::m.0:wc mwu

  Two long parallel wires are placed side-n qtt:.j+ vzs:by-side on a horizontal table. If the wires carry current in opposite dire j.vt+:tz nqs:ctions,

  Consider two current-carrying circular loops. Both areib /7-3m v4 awijc:oxx made from one strand of wire and both carry the same curr bia:xo mwx47j v/-ci3ent, 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.7 a:nyiv)6 ax -ag +/wc.rtoap Both are made from one strand of wire and both carrtvrawn xa)ca+.:i7y-a /6 pogy the same current, 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 th8v)f eblv/ws1,h; hzye loop's magnetic moment and the magnetic field bz ysh,18/)h lv;e vfwvector is

  When placed askew in a q2rmvc00 eou :eoz)qbz (9( anmagnetic field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment vr:(cv qmoze2u9a (0q 0 oenbz)ector

  What fundamental fact underlies the oper/ny- ir *mviip kw()g8ation of essentially all electric motors?i8kg nyvm piir) */w-(

  A circular wire loop lies in a horizo.kiujph b5ade ..)b7e.uxm2i 7gt :vontal 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. Which side of the coil tends to l xj.g ik.hb.mu p77u)5.ob ie2:atevd ift 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 throu+ i/rnev 5ml1jgh a potential difference V and allowed to enter a magnetic field B, where it vimn+e1j5 rl /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, and R.

  A velocity selector consists of a charged particle pass ffqlt8m44ec zc0 g1q8l/d1ujing 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 movj8c 4tcl8efdz0m4luqq1g /1f e 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 g*r1*bme uchl8e h; k) )kc.j0y7azdj uniform magnetic field ocdb70kkej * g8u 1 ; zrjcy*hah.e)ml)f
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of e u-s)wngjpl tij6u*/h;.,nj h+o7 iz $30^{\circ}$ 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 st1*i;dsm ( f+cb yk)bfi34d *p nmafg4traight wire carrying 5.0 A when it is placed in a magnetic field of 0.020fb g;1 4i b3f)fn4dsc ad*y+imk*( tpm T? The wire makes 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 kg and is in a magnetic fieoh+ 9gkt;avd1ld of 0.1t91 og;ah +vkd0 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 is in a uniform magnetic fiel56wy s- l/q+xoktok tzsn+ (7rd of 0.20 T. What is the magnitude of the magnetic force on the prqozwtyk5/n6ts - s7 x++klr(ooton?

  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 a spee ohtumj3/u va /y/*m5l;dg5 b1xd x0ljd 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 af4b nh; mnf--t 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 tfec8kz7;6jmwith 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 withr;4 mgua wz9)n 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 /y dumg1h.y5 t9q q-vdspeed 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 w y2kfpm+e w5q8b n48bof $3.0 \times 10^6 \; m/s$ 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 cuo 4q xvpcx m-h14nc8us+k)2ow u9f:pirrent of 25 A. What is the magnitude of the magnetic field at a distance iu-p ) hq9cf+oucx om8 w x4nk21s:4vpof 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the grl1oir5j2t- f kound, 10 m awatko1lfj r-52i y?

  How much current must flow fo6kd8 a7ecavx+:zrdro gg /m *5r $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carryi4:u0b tpo4g chol s j,y,/a 5.k5r*xmz ze4jpung a current of 5.0 A is the magnitude of the magnetic zuo* a,mz. j4l4r /ptghb4kuxj50, p5es:ycofield 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 currenkrxl iyv5jd,t*v b8/ (/c-ijrts 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 kb(58,x/vlvjjrdtr ic*- y/i point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0td e .mr:m*(d v(e/yoz A in opposite directions. The wires are separated by 0.20 m. What iv.dt(yer (emm:z do /*s the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in ott0xbo)1 9u 1ty qgspn3gquu+d.1t 1w pposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from b.xq1 t 3d910qn1pttg 1 y+u tgus)wuothe two wires the same?

  Four long parallel w q5c,nw( fj4) 7rfy/-znklyreires 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 positioned in the x-y plane. What magnetic field does one of the wires experieyc, 4k n)7 r-ffl5rnq/ejyzw( nce due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the ox*i ej44z- brwpbtp 7,pposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length betwee pp ,4zreb *7jxt4wb-in the two wires.

  What is the magnetic field at the center of a43w* xt z(iynsp *ad2cihg,0j circular loop of wire of radius 4.0 cm 30, t nxzhi4psjd *i(gc*ay w2when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 tur6wwa lq omh)l5mh z:0-ns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A floom5mwalq :-hzl0 )6whws?

  A solenoid with 500 turfge( 0 w;nob1zns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic ; 1(w0nefzgbofield will it have at its center?

  How much current must pass through a 7e hko+qd m709la 2akq400 turn coil 4.0 cm long to generate a 1.0-T magneti 0 qd+m7lae7oqh9kka 2c field at the center?

  How many turns should a 10-cm lonr er x:lr87 d2x4eze;gg 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 rectangular loop of 120 turns that carries 6.0x-r 6i9rhi0d h A ifr hx idri69h-0 its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uni5;ahkd7go .cfb:,sst 216vk m4r1 k3ezdxa csform magnetic field of 0.30 T. The current in the loop is 2.0 A. What 3:d.1,x saa os2 k ;6vst gbz h5kdrcke47mfc1is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cigf ii00s ern789c 8hqross-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 o*tsl *0o ri/k10dzrc1l1yiv ef 3.5 T. The loop has an area ol 1irdy*t1s10*z/o ri kcelv0f $0.12 \; m^{2}$ 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 0.30vqv:) se 4kakx1,a4:t nz/mod T. The current in the loop is 2.0 A. What is the magnetic torque ,vq:/x nz kas mv4ke 4a1ot:)dwhen the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniformxzj+qs zr+,-q magnetic field of 0.30 T. The current in the lrx,z+j z+ -sqqoop 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 oeghrdlc.k1f( . zyk1u;k)4t k)ew(q sf 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 (clr q/p:9g* ydpharge 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 7/(v y8mhr lgp$6.9 \times 10^6 \; m/s$ 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 ot++z/ xt8fz ghvc)e8gf 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of thz f)8xthgze/+8tc+vg e proton's resulting orbit?

  A proton is accelerated from rea :e3 w qp..e2mvvtb*bst through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine theew* v. v a3b:bm2qpte. radius of the path it follows.

  A beam of electrons is accelerated through a potentn9ctd (hwg4vu rc n9;0tlf:a5ial 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 o; tf:0atr hl9vcugnnc 5d(9w4f the E-field is required if the particles are to be undeflected?