If the north poles of two bar magnets are brn1pmz-ikt:o0;g 4 au eought close to each other, the magnets wil14i;gz k: upo- nea0tml

  If the south pole of one bar magnet isp jl 6 uc2e7ebvb1 zsm(w6c-7r brought near the north pole of a second bar magnet, the tw6 e71pj2ml (rwucbe7svzc -b 6o magnets will

  If a bar magnet is divided into tfdlk i;*)5wr ve)s. q sxy-e*mwo equal pieces,

  The Earth's geographic Noyd8dmm*y 0 m8frth Pole is magnetically a

  The south pole of a magnet points -d 7ri.qitwa0toward the Earth's

  An electric current p/g2fus4bs5n (nndx6 vroduces

  Which of the following is correci xtvyw)ys 7);t?

  A vertical wire carries a current straight down. To the east of this jbs70q4c mlm9r:cqr38a -z xt wire, the magneza79- 4 lt b0r8scqq 3rjcxm:mtic field points

  A horizontal wire carries a current straight toward you. From your pu z)gk90- bjfvoint of view, the ma) 0bv9zk uf-jggnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewedp gt1w+qm cso.nu *n/8 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 lo+tcou.8mn/s*1pqg nw op? The magnetic field

  A current carrying circular loop of wire lies flat on a taw3rz 2ms(tgh7n v/h*n ble 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 currentvn mg2/rwn3*zs(7 hth, inside the loop? The magnetic field

  The SI unit of magnetic field is th nwyswjem:)*os9, ivf8iy ;/rvjae:5e

  1 T is equivalent to(6p iwwoj:s1; /fkzp6v*hf wj

  The direction of the force on a current-carrying wire in aw5b9f 9o:ghnqo 79dkb magnetic field is described by which of togbo99bq 97:f5 nkhwdhe following?

  The force on a current-carrying wire in a magnetic field is the stronge f;eg as/s--phst when

  The force on a currenl pgn0 ,5)3dgx1e rcm+al0cwrt-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current qt3 xqk 2fh*3mstraight up in a region where the magnetic field vector points due north. What is the directim htfq*kx 233qon of the resulting force on this current?

  A charged particle moves and z3qp9a d 0 yz+hovoa+9experiences no magnetic force. From this we can covzao9+z hp9yq+ d03 oanclude that

  A charged particle moves with a constant speed through a region where a uniform9izzx 6 b 98pb(d*,jg j1yxltg magnetic field is present. If the magnetic field points strpzx9x9*yt6l8 bgi(j 1, zg djbaight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across q,vr hpp-0csc-) to *ej5kj ad(zmg69a constant magnetic field. The magnetic force on this particle( 6)p jjs0t qor*-kg5czh9v-cp,eadm

  A charged particle is injected into a uniform magnetic field such th x*fu( i6k1bhgat its velocity vector is perpendicular to the magnetic field vector. Ig6bifh1(ukx* gnoring the particle's weight, the particle will

  A charged particle is observe0x-xv)j ref) ld traveling in a circular path in a uniform magnetic field. If the particle had been travelinv0-jxlfr)) exg twice as fast, the radius of the circular path would be

  A particle carrying a charge of +/kanwh:s gn (9e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the ci/(hw akn9 sgn:rcular path would have been

  At a particular instant, an eqsig3 le tr.:)lectron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic forc:s3 rigq)te .le that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwarhg,t)i dfk z118e0gbb d as the result of a magnetic ftdggk 081ezi,1h bbf)ield. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a uniform ma,jwxl71bc sc/ena ++agnetic field in the +y direction. What is the directi+ ,xcas+ e cnwal1b7j/on 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 straight current-carrying w8)bzie1r 0h xm5 el ey9stdo:) odt-o+ire is

  At double the distance from a long current-carrying wire, fva:wqcp7qc.,g + nrqha36/athe strength of the magnetic field produced by that wire decrease qacch3p/ vfw7,+qr :.6 aagnqs to

  Two long parallel wires placed side-by-side on a horizontal q3 7vlftm8 ;h e8yxwm-table carry identical size currents in opposite directions. Thex8qlmh-v7m83ey;t fw wire on 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 pl 0k /v2frw2b4)us zfzjaced side-by-side on a horizontal table carry identical current straight toward you. From your point of viebs04)kjzuf2 f2z rw/ vw, the magnetic field at the point exactly between the two wires

  Two long parallel wire u6b ssc7jj0n(65it1 rsh -crss carry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is tu-i5hjss (sbr stjc17cnr6 06he magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A protojfgp 84 lis ef,+.wq/bn moves toward the east alongside and gj+ . web,f/pslfi8q4 just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current tocc/hxqc:y0 :ek3 o, bzward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpqb/x cc: ,3koc:ye0zhendicularly 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 tabl/iebz t5+d 2xge7jy1le. If the wires carr1b/d g2 l7e5 +ezityxjy current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table.)jx:xbw9lb3 i If the wires carry current in opposite di) :3xwx ijb9blrections,

  Consider two current-carryind4 (lb 8cpc.ofg circular loops. Both are made from one strand of wire ac.84po cdbf(l nd 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 as3/u3wo4 ztwjh p,h4 vgcm)js6 h 1yr8re made from one strand of wire and both carry the same current, but one has twice jhs/m,4u1hrgoy3368 cw wjs vpt)4hz 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 b5a(a7cq rgmo /etween the loop's magnetic moment and the magneti7 aag(mrqoc/5 c field vector is

  When placed askew in a magnetic field, a current carrying loi+ .z1 1xvagf53wcj ad80ste tzr 1sz0op that is free to rotate in any direction will experience a torque until its magnetic moment verv gz5w1 1i dz+83asfa.cz tx100sejtctor

  What fundamental fact underlies the operm xu,gn0;4b,oe tn;6oy:vqw h9ixh *wation of essentially all electric motorse;hn o,qg*uwyvobhx i4tw ,0n6 :mx;9 ?

  A circular wire loop lies in a horizontal plane on a table and00o;qi-)df(0t pc i /ht q9iobacj4ec 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 c-fqdiocqt49)/ hojpc; 0e ai( 0i0btthe 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 m cubzuv-7t9-x uczw( )ass 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 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 teruz-u-)t9(vbzc7wxu cms of B, q, V, and R.

  A velocity selector consists of a charged particle passing thf6 nyu(4b1f pyn v8ov.rough 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 fiu8p1n (f 6v4 fy.ynbovelds. 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 curren*k5 v4pi: i.k uylsf-jt of 0.60 A is oriented parallel to a uniform magnv5l* j kiykis pu:-f.4etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A injobvo gv68 j:(9o/ .g7rit zan 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 * 5cxs5*u7 wq(gupg(pz j6 zhewire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an ang6he5sguu5z (z* jxpqc7pgw(* le 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 magn 23l2mw g(nz.;*ipcxdvqt5t 5lmw;gfl4t: tvetic field of 0.10 T. What minimum current in the rod is needed inglx5dzt(5q 4 2wv;cg vtt l:lt *fn32wmm p.;i order for the magnetic force to cancel the weight of the rod?

  A stationary proton imq6sf6:. yjb1 cx/ zyos in a uniform magnetic field of 0.20 T. What is the magnitude 1y.:s c6fq6yj xomzb/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 with a speed 6j /v1+s3jg:gyxz3jccq t ,xaof $5.0 \times 10^4 \; m/s$ 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 speed of 0y(k. e6-vsyqxbg0gkb s3af5 4v ;tan $5.0 \times 10^7 \; m/s$ 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 noaw/7 gst v 9fotv7nzj4lle;7: rth 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 e-ng;u 5 -h czl6g*kgmspeed 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 gyn1e sqxk7ey+cx3a .2dfy-)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 otl 2 yk wwmp86u+9b8yov2xw;ff $3.0 \times 10^6 \; m/s$ 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 w/ zekf i8 n+at1)z.zwiire carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.ii .aez1+w zn 8ztf)k/15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at 8k txc28n7( 5im3 zmxx- dmwjfthe ground, 1x3 cf8ix(m- t2m5nwkm7jd z8 x0 m away?

  How much current must flow4kl 4 fy5vaz7dy9f (tw 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 straight wire carrying a current of 5.0 A iszfjb44qh26;9wqqe , g rckp1n the magnitude of the magnetic field dueje ,r6k h fz4cq;q42bwngq1 p9 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. kem 9 80:i5vsf8ida dsi;g:czlp iu04 They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point thm :z:c9k50u488esdp ii;g aidlv 0fisat is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in kz l58.kuaxiyc77 j0vopposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between thezk.l08v7xcjk5i a7 yu two wires?

  Two long parallel wires carry currents of 20 A and 5.0 ps ;s2q- bnhswx j/1fiz10e,6ypyua +A in opposite directions. The wires are separated by 0.20 m. At what poi+hseys0 6s1z/wa;npu-,y2jxp ifqb1 nt between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are g0u .vhxs rg4a8ild*2j ub00oparallel 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 fieurgs b4dgi hx8u00o.0aj2* l vld does one of the wires experience due to the other wires?

  Two long parallel wires carry current iv 2s7,pcqo2ds of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the t2q2,c s7 oivdpwo wires.

  What is the magnetic field at the centepdk+gwf.a b(( r of a circular loop of wire of radius 4.0 cm when a current of 2.0 A.(bk+ pg faw(d flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of ml /m.*s7-b vkptk7bu;gfdf9wire. What magnetic field is produced at the center of the solenoid when ab-*gm7 /fmk;9. t bld kpsvuf7 current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries awmv/kn/.udjak cg o4ow)4) 4d current of 4.0 A. What strength of magnetic 4udjowv km) ado/)gw.nk 4/c4field will it have at its center?

  How much current must pasqo(i, msa3.y cs through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at mo3s q.aciy(,the center?

  How many turns should a 10-cm long 9bds;a ik8:b.n 6kucc 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 r;5 h mp(omf pfk,fx402x,bxvwectangular loop of 120 turns that carries 6.0 A if its dimensions are 4xfwb;f2 pxh pf4k0v5m(x ,m ,o.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.5g g pk pr28d0be3bknb2z dlv0:(z;g,l0 m is in a uniform magnetic field of 0.30 kzbv gg8e3:zr,b; 2ll00kpp g2 n(ddb T. The current in the 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 wg9ey9 mu gl10 k-waeu nmnq:rj) 5k0(tire 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 3.5p w gkzimgt g+(-jdah;:v*b3+ /9 hcsv T. The loop hg (-az3hk;9hc/vbg: +dw g*svimtp +jas 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 radius 0.50 m is in a uniform magpw, mmlo f;/ *.p9omhunetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when tf9 /pmho,*uwl;mpmo .he plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is4a)r g *kb*rnxi6(fc ,eb-f j1u1q vms 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 parallel to the magneticu*xcfv*6n 1mrksi r b4j-abq e()1,gf field?

  A circular wire loop of areamkg+1k 45xnsnpv-i /b $0.25 \; m^{2}$ 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) has a s(r d *hedz4pqs;x.4xd ct /49iixlxt /peed 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 wi+qo+ k i/xj/coidvkh 18:m .s4n)nx mith 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*2-ww egwf 4lp a magnetic field of 0.040 T. What is twf*-pwgl4 ew2 he radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 82j( uql(ov* gfyi*pj V. It enters a magnetic field of 0.30 T orie(p vo lgujj2f* q*yi8(nted perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV befww v /zm0)jcl.ore 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 i zj/wvw0l .m)cf the particles are to be undeflected?