If the north poles of ghe x+1 9mkc0isp+pw3two bar magnets are brought close to each other, the magnets will1+emg kis+30x wcp hp9

  If the south pole of one bar magnet is brought nearr 1s h;( *vv/7i*no;n2yaguca5 jufao the north pole of a second bar magnet, the tw7va/r ona2yuhc ai ; *f(;g jsn*o51uvo magnets will

  If a bar magnet is divided into two equal pi cjyn z f9n ku;(ybp)5ujb3s.6eces,

  The Earth's geographic North Pole is magnetically agx6bn 4 6(gsrtmz ue*.

  The south pole of a magnet points toward the Es bs:9z-2)y6klaymf d7dik4garth's

  An electric current p,4zkdxaex -5b roduces

  Which of the followikz xhnhb5vti6,hm f8+x74 mg3ng is correct?

  A vertical wire carries a current strdc2n ;jb1qru-5*ibp aaight down. To the east of this wire, the magnetic 1 d-jc5 nb*bqa2r;u ipfield points

  A horizontal wire carries a current stjq eglmd:5+yl7 (,-uko ukh0draight toward you. From your point of view, kegu5+:mj kld(y-o,qu7l 0 hdthe magnetic field caused by this current

  A current carrying loop of wire lies flat on a tabl f4qbbw)2kq f )wvq+a;e top. When viewed from above, the current moves around the loop 4ff2k b;q+aqwv)w)bq in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When viewed lrtt c()gp j-jk,12aq from above, the current moves around the loop in a counterclockwise sense. What is the directijagttqr)2-(cjlp , 1kon of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetg3jxf i* g9/w;weuzt +(t1hoz ic field is the

  1 T is equivalent to6y. /j1yq8vw nk ft)z apoe63e

  The direction of the force on a current-carrying wire in a magnetic fe03ws)z9s, mf2o h fgtield is described by whichts 2e9fsf gz, )3wmo0h of the following?

  The force on a current-carrying wire in a magnetic field is theqp. 7 l6fbz/m7u ji(o2 smh.of strongest when

  The force on a current-carrying wire in a magnetic fieldeu* 3tv n( 2sdbjko.9x is equal to zero when

  A vertical wire carries a current straight up in a region where the magnetic fiudl*r ;(t7j uneld vector po;*l7nj rtd(uuints due north. What is the direction of the resulting force on this current?

  A charged particle moves and ee*94pb+c + fe0vbc fclxperiences no magnetic force. From this we can conclude th lev0+ b9ec+cc*fpb4fat

  A charged particle moves with a constant speed through a region where a uniformykh2bw f6j 2n+dmqv): xe5se6 magnetic field is d6s bn x+:w26h)mey5jqef2vkpresent. 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 magnetic forcsarkyt :: e, ozzq+mu 0;f);uqe on this particle:fzsq);0; ay:zo erku mt,uq +

  A charged particle is injected into a uniform magnetic fieldeb98drk9 y 7l:xm0 pk-pzs,zc such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle zp:k9 c9 ,07d-8srzexkbplym's weight, the particle will

  A charged particle is observed tr: b)bswz:t*gev; lp. oaveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radiup. zbt)v : owbel;gs*:s of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform u sqnclde*)ivi 72/- kn0dm3cmagnetic field. If instead the particle carried a charge of +2e, t iuc*c-qdlm3nesiv2/n 07k)d he radius of the circular path would have been

  At a particular instant, an elexymrpn 8a2 -g3ctron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic fo mxy-r32pga8n rce that acts on it is

  An electron has an initial velocity to the south butx a6 b,kggbn8vcy sfu 09i+,z, is observed to curve upward as the result of a magnetic field. The direction of the magnet9 an8,zxbgs,+ 0ki,ybfvcgu6 ic field is

  An electron moving along the +x axis enters a region where ther).t z33il 2)vkw4 uapk lq9guqe is a uniform magnetic field in thell2 puzkt3)qawu. v 49iq)kg3 +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 straight current-cnyxfx;, 8mbpgx8grjpqd : :,9 v9z;x aarrying wire is

  At double the distance from a long current-carrying wire, the strength of + )ywwpyqs 81 5ekvg*/ina7iu the magnetic fielg)+e15wu8 iya y*i/vswkpqn7d produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carr.5elep8 nf zat1oniyt3sfwl 68k6o7 )y 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.)eetn fylt588i3a o .ks 6fpn1lw76zo 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 x(tdl(dm 4v /,hzp9;d 7k(cz/llanc n on a horizontal table carry identical current straight toward you. From your point of view, the magnetic fielmh( zzc, ;l cdp/k4 7/9dnt( axdv(nlld at the point exactly between the two wires

  Two long parallel wires carry equal currents. Thhni1h 7rpn+; ae magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force betwe ;hri7h n1np+aen the two wires?

  A long straight wire carries current tu7 os- ) * anc-jrk63lzqgep6qoward the east. A proton moves toward the east alongside and just south of the wire. What is tho -zlscjepr3) 6ng q qak6u7-*e direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bobsf0:*x dzk8(1r ak7o0cq y zettom of the page. What is the direction of the magnetic forc8sz0xrkq (a 7db*yk:z10 ceo fe it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wiwf.6)n:hry r lres are placed side-by-side on a horizontal table. If the wires carry current in the same direl:)nwy6 . frhrction,

  Two long parallel wires are placed side-by-side on a rp i8ge r,)4xihorizontal table. If the wires carry current in opposite 8,4ixrgr)i epdirections,

  Consider two current-carrying circular loops. B jhrm,c 0sp q; kta/caeo158,goth are made from one strand of wire and both carry the same current, but one has twit,m;5r 08qkogp1 hs,c c/aejace 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 fro ; t(qg;4 hq 3-a7*mcxczqnzimm one strand of wire and both carry the same current, but one has twice the radius of the othegn(t -;q;zq7zac 3imhcq x*m4r. 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 the (klh4* cn b 3r t/fbwn*2yw,udloop's magnetic moment2fn* wnl4w*hkdut3rbc(y /, b and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loou7k 5czmshd o6;0eum1p that is free to rs;h10dmuo5uckm 6e 7z otate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of ;g -tq8gugt x9llnn;)essentially all electric motors?g u;tgx 9ll -nn8)qtg;

  A circular wire loop lies in a horizontal plane on a table and carries/kb.7jzsf ct,dzof5 5 current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dipsfs, ctf7 5zz5k bo/.jd 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 particle of mass m and cha d;61j :ji- j1rlhi9 bs6ylrdmrge 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. Deriv6i1dd1-;l jyj9:6rbhril m jse an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a char jnfhtb iw( i.o1ow637ged particle passing through crossed electric and magnetic fields. The forces exerte3fjbi1o (h6wwo7 nit .d 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 0.60eaf+ki;k etptw 12i; ge91qyo0 kc7-y A is oriented parallel to a uniform magnetic fieti79;y we1fo c;1k2 -+gekiekt q0pa yld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in agg8wj ;zkrg1mp f29 *g 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 wire878avhhpxdyizir 8pg2 f0ul jgk 28 90 carrying 5.0 A when it is placed in a magnetic field of u8gprik x0 9gfjh 2807yid8lp2 8hvaz0.020 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+:xs-g. jf+q8b fizr;z wptr- and is in a magnetic field of 0.10 T. What minimum curre-fgwtr-p sbr8i;q. +fz xj+: znt 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 fis1uu5x .bo(nw3 d0 o:byp-vk teld of 0.20 T. What is the magnitude of the magkvb1( 35tux.o0ow nsy: ub-dpnetic 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 witgt b1o*qb-v igj)6udk2ww+yu wg0l6(h 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 sp uy0nx(o*odr 5eed 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 nort, rg2) d0 i(qktj53hfhok 4x(oumk6zkh 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 sjmx;- avt q9c2peed 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 speed ofl1f+vb:ibgt 6i*g* mf $8.0 \times 10^6 \; m/s$ 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 of l ip/6h3ike;m$3.0 \times 10^6 \; m/s$ 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 magnitudk *8c2ck4m:5xmydmi4 de g;yde of the magneti4kcm i:d8mg kyyc;d 2me5d 4*xc field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnet4 dyx j9m6yv8pic field at the ground, 10 8vyyxd9p6 m4j m away?

  How much current must flow fwj y z**+5reryor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of9m.( 5o exwzad 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Ea(9 wxm.ae 5zdorth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry current jt*l8zw66;u1pfjr,i4 l:vu 2lxcmbj s of 10 A in opposite directions. They are separat flj 4xullu1v2*w6rjb jpiz ;,:t8m6c ed 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 other?

  Two long parallel wires carry currents of 20 A and 5.0 A i2tguv 86ur; qa)ck9kl+rmnh3y /i 7ion opposite directions. The wires are separated by 0.20 m. What is the magnetic field midwavyk2ui7 r9lt8) h uma+qo;i6/ kcrng3y between the two wires?

  Two long parallel wires carry currebg*jqh.k6 )dr nts of 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 b 6g. dkhq*r)jthe same?

  Four long parallel wires each carry 2.0 A in the same direction. They are par,*z/f:d)yyr: un7huj ,9rvxm ; llxo yallel 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 fln;yhru,yu,/ :m z )9xrfxlv:ojyd* 7ield does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A a d or6dr0xwe/q j0mh*+nd 8.0 A in the opposite direction. The wires are separate0d+q rjo6m/x*ew d0h rd by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center /a8q2qq +nldsp xh**d of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wil8* qxpsn /q+a*ddq h2re?

  A solenoid 20 cm long is wound with 5000 turns of wire. Whatgu-gmx37zy .vg:6bd gqa p9w1np:q8u magnetic field is produced at the center g8pag p.qznv9q wydu6 :mg-xbu1 37:g of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 4vf.i z1hbdcx /)m):l-mjoo d0.10 m long and carries a current of 4.0 A. What strength of magnetic field will vm m/bcojd 1fl4).z:do)ix-h it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generateuv iun*cyaa(;y ry-mcpaitm2:-/; h; e:jen, a 1.0-:m i; c ie;pam(/--,uyvj;n *yaau:rt2cnyheT magnetic field at the center?

  How many turns should a 10-cm long solenoidreh c(th,4nz3m: x5iqswy-w- 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 rec7w t+2funa/*i: jqtvptangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0n aj*:tftquivp2 w7/+ cm?

  A circular loop of wire of radius 0.50 m is in a uniform mag2pg.p vnsnh+7,p 6lgb netic field of 0.30 T. The current in the loop is 2.0 A. W hg7pslv b+g pn,p.n26hat is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire 0 u;n *slc quxh.w(in 1e3jvk n,mq,z6of 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. 6dc*q9p/komhyve+1 gThe loop has an aremogqh 6c/e 1p*v+ ky9da 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 anfdi/:ue-l+h/i0 tl zmus1h hz 9.y v2 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 paral y1l9 t.h/df/zlms -2:iniu u+0hvzh elel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magfia 8au x+v-ej(wvw 26netic 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 magnet wevw u2-aia+x(j8 vf6ic field?

  A circular wire loop ofu7aimju+ 7jz3 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) has a speed odsk iumq8e. 72 9hq/dhf $1.0 \times 10^6 \; m/s$ 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 dxmhf4ir.3f.s9 d si-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 kV5 x3:vzipqv. p and then moves into a magnetic field of 0.040 T. What is the radius of the vp zpix.3:5qv proton's resulting orbit?

  A proton is accelerated from rest through 500p v0xbys5)xt h 21bt1t V. It enters a magnetic field of 0.h)1tsx b1b2px 50ytv t30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differeno9os0h ru;g d(ce of 10 kV before entering a velocity selector.;du0orgh(s9o 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?