If the north poles of two bar magnets are brought clt,y:l*doq+ y zji7au7ose to each other, the magnetsyj a7u7l :+yo *dtq,zi will

  If the south pole of one bar magnet is brought near the north pole of a secj84z7rmkz5c q/tz: ycond bar magnet, y7/cc kzrmtz5: z8 qj4the two magnets will

  If a bar magnet is divided into two equal piecef 31te5vy3m2+zt q bjas,

  The Earth's geographicsw di3 o6 m8dvezr*9;.lc xbjoy(n9.h North Pole is magnetically a

  The south pole of a c39rjpl- k2p4 asajx5magnet points toward the Earth's

  An electric current prv g((d fgbwj*h1iya-h:+y.yyoduces

  Which of the following is correctuv b;j c*kpovgfr)* /6?

  A vertical wire carries a current straight down.+sjrer0l ( i*r To the east of this wire, the magnetil*0+i(r sejrrc field points

  A horizontal wire carries a current straight toward you. From you 76k g5ig(xs:avd-bfhuqx9yf 40 )s(z*xs sv ur point of view, the magnetic field caused by thi s(v yuf:(bh9*az x - x q54dxs0gg7s)ku6vfsis current

  A current carrying loop of wire lies flat on a table top.1hgs; x v(lha5l/ qfn3 f0jg)m When viewed from above, the current moves around the loop in a counterclockg0 maf(h3 lv)h;5fqnsjx/1l gwise 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 vie- z-6cxx jd0iewed from above, the current moves around the loop in a counterclockwise sense. What is the directe-jx c-0ixz d6ion of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic*ycrm j uc 9uoix:(-b9 field is the

  1 T is equivalent to/ -fhlg 4;rpz:9dshct

  The direction of the force on a current-carrying wire in a magnetic fie+1/; v 8szhjoxa/kbce ld is described by which of the followcvzb ;ae8x/so1kh + /jing?

  The force on a current-carrying wire in a magnetic fg) l g8kt8vy)(uhl cv0g(quf6tz4-a uield is the strongest when

  The force on a current-carrying wire in a magnetic fmx) blao40 c3uield is equal to zero when

  A vertical wire carries a current straight up in a regiony7 2zsitqj4e55 r+dux where the magnetic field vector points due north. What is the direction of the resulting force on this s5j5 2d xei+4u tqz7rycurrent?

  A charged particle moves and experiences no magnetic force. From this weug dy35 ez8re7)3bo5fl9vzru can conclude8 ulrzd9)gzbrve75e3f you35 that

  A charged particle moves with a constant speed through a region where a mme-: u;: krjc1p, kqryw9 +cfuniform magnetic field is present. If the magnmf+- 9 1crkcuwpq ,eyk ::m;rjetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across . r 7bsp:(k5duf+) uhw nk (sq.nww:dpa constant magnetic field. The magnetic force on this particl)p(u7: fdw(qn +rs5 .n kw.h:pud wbske

  A charged particle is injected y, uc+kvy/p(nb1*s4lbb aoc2into a uniform magnetic field such that its velocity vector is perpenacupbb2*1 o/y4kby(nc +,l sv dicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniformev;ny2r2iyz2 mol 4m8 rm.:/hlmvn4u magnetic field.mr8e:m 2/ hu 2n24ylv.;vn rzomiy 4ml If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in au0d 7tzpk 3h*p circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have bepud0 th 7*z3kpen

  At a particular instant, an electron 6c-;gna :nhq smoves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it sn6- :a;cnh qgis

  An electron has an initial velocity to the south but is observed to curve upwar /fxeojf-hoapc5hu*e 735u +ed as the result of a mac5oxju7e*ou p5 hea-ef3fh /+ gnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a regione6ksbx4yv;7sdn e1dn tg0l.,:xx z-z where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the eds47 e 6 x zg1d:ynvs.t0 z-kx;bxne,llectron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straig 7ne5po + mld4xqg-,6 xixypj-ht current-carrying wire is

  At double the distance from a lo2m9qdok+kt9e0ey e tzpx h s6+6b9f,mng current-carrying wire, the strength of the magnetic field produced by that wire be9shy+p ez o+6mtdkm6 f9tk,x20q9e decreases to

  Two long parallel wires hc i2tml0i f 7(gzw/3dplaced side-by-side on a horizontal table carry identical size currents in opposite dirciwhfmgd3/0tz27(i l ections. The 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 placed sijc/hoykj7ph; fg -+( ede-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the c +;jpojhf/7e-g( y hkpoint exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude 2nxme g,syk:c+ f3 .ueof the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new forc+,:23gekmf xn .scyuee between the two wires?

  A long straight wire carries current toward the easfsj)9iiu m 14hvg-* vft. A proton moves toward the east alongside and- jh* 9fu)vm4v1isfgi 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 curren0.p vzp a,g8ux9n)a vgt toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward thgvu0xapp ,) .zga9vn8 e wire, also in the plane of the page, from your right?

  Two long parallel wires are placed 4o p fr;lw(o)pside-by-side on a horizontal table. If the wires caropr4)fo l (pw;ry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the cknaa8bn79mp4,r6 ,-eb l gbdwires carry current in opposednb8 - r ab,pg bn9kal6cm4,7ite directions,

  Consider two current-carryingpjqshxbb l98/ 7,rbzk*9s.uk circular loops. Both are 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 fielsj,7b.*9bqrb h sx /kkzup89ld at the center of the larger loop is

  Consider two current-carrying circular loops. waui):zz+ b bl an oo(q)fvri zt366g808qjw:Both are made from one strand of wia wo :i8q+zq6zr 0 bf:u() ing8ajozvlb3tw6)re 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 magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the anglek2vwio.b6q +t between the loop's magnetic moment and the magnett+2k.wv i q6boic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free tokl(kwknx 3dceh3 j4f2;0 x f7x rotate in any direction will experienc ekk 337h(xwnfxl2ckd4fx;j0 e a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentr5r,dxc7 *wkbop ).fz ially all electric motorszfkb rx* 5p7d.wco,r)?

  A circular wire loop lies in a horizontal plane on a table and carries oow6 bc;5-ikt 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. ci ;t6k-boow5Which 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 spectromet-1s (8eisb 1hnme f9amer a particle 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 path of radius R. The magnetic field is uniform and oriented perpendicum(mnf as8se-i1 he 91blar 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 through crossed exry8pu 5qm, d ah9z;v9lectric 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 electric f ;ymqaxhzprv d8 9u95,ield point?

  A 2.0-m wire carrying a current of 0.60 A is orientedla:3advao ,yqquvsm n -27 sn mdp,8)u- n12cf parallel to a uniform magnetic field82v,u a dld2qqa7n ysuvon-c), a:p s-nmfm31 of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current jhjy(xs f4,/slt10v)nlkj ov 3iwv*-of 10 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 wire wty65 p y1w;fgcarrying 5.0 A when it is placed in a magnetic field;f p gw1t5yy6w of 0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m lonq*.3kyvv:p c a.f/ww lg has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for tap.3vw *yq f:.lkcvw/he magnetic force to cancel the weight of the rod?

  A stationary proton is ixkk //rr*5m qya3cnw4xd,bs9 n a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the prot5rkc3/a y /x9w*mbdnk ,qxrs4on?

  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 of b n6)wk)ez/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 3 (1bgwxku l4rjv(o7seed 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 travelinjqp7-ux0 9o,c/5c(fq 8zewzcnwo og o6 9xl9mg due north 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 speed of s3h.ar/u xpdbj 7fl* *$8.0 \times 10^6 \; m/s$ 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 speh5sdrt.*u h 2z6;j offncxb 5,ed 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 mfuoiq.o 9m3/ 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. What is the m-. 3pr-wlok2 dqpjb*h agnitude of the magnetic field at a distajkoldr . pw-3*pbq-h 2nce of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the ground, 1xl3h+qkswx vzt, tkqy, yv l;rx k46;bo,)m9+0 m away?l,ktzst w 6kyx lxo+q+y,)x,;3hv v;9rmq4bk

  How much current must f8r w);eu )7tg dorgh)vlow 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 wireejnq(uz +6 xr; 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 fie(jr;+n6z x ueqld of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directi74 8 miw6gd gzd z8e25scymo,oons. They are separated by 40 cm. What is4om smz w82i6g,dezc ygod 578 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 currents1;xn / yqpwa1l,dlb n6eq g(-c of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betweenxn(gec6ll a;-by1pq wq d/1 ,n the two wires?

  Two long parallel wires carry cusp gm;63s(fdz 5 n.y0vwxlut-rrents of 20 A and 5.0 A in opposite directions. The wires are 0ysm.d(pvuw3l56z ; stfng x- 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 same 8vj x.n(b nxzgwyz-8,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 experience due to the other wir. xv-,8(zjyzgwxbn n8es?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposite direcdl 3;gsf0e9+qc u :hcction. The wires are separated by 0.30 c cchq us9;dfel3+ :g0m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at thfj -1r*ryft5 ffa7oer 5e :su2e center of a circular loop of wire of radius 4.0 cm when a cur:rr effae*7t2-y1 frjf5 o5 surent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fiel:. np4d+wjdfaw7(z pld is pr:(pn 7lw wf4 jzp+dd.aoduced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is t2o gjdsop+/ mb3cs7 70.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at itd+3o7c/b gpt7 s2sjmos center?

  How much current must pass; 6 1oiy pc;0ifc-khes through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the center ;se6if0 ik;h1coc yp-?

  How many turns should a 10-cm long solenoid have if it is to generate );3zn1f hk jmra $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loop of 1y5+3t aioa2w/ mvlgwa mhbx0 :,j;y) g20 turns that carries 6.0 A if its dimensions are 4.0 a wgi;v a h 5/ayjl+:wt2m)xmyobg3,0cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field k gg 5-ferv+a0hd5ij3dm:+zc of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when thr g:m+zvgfd-de5ij5+ckh a3 0e plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cros( myx. kfkoq/:s-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 hz6az0zrc04b i stl6. a magnetic field of 3.5 T. The loop has an area of 66s.za00zci lt r4bz h$0.12 \; m^{2}$ 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 magneticx2jc:5xms5 6sddd4ml field of 0.30 T. The curre5mdxc 5l4: sxd6djs2m nt in 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 loop of wire of radius 0.50 m i /pvcaqktzjne5nc 5. ;5nzt)7s in a uniform magnetic field of 0.30 T. The currec;5)zknj pn cve tt5/7.aqnz5nt in 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 obd d-g6 m8d -/ee+jluuf 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 speedu; w.z:j dqm-v 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 k.3:n 0ynlp ebwith 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 -c;zl dnkl9*b into a magnetic field of 0.040 T. What ;n9lkdb l z*c-is the radius of the proton's resulting orbit?

  A proton is accelerated from r c0k-fr(lenx7fr2 ( lsest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the pathcs0r llx7(f2r-( nfek it follows.

  A beam of electrons is accelerated through a potential) /i9huvote8a: jok9lv. x:y4oh;fzq difference of 10 kV before entering a velocity selector. If the B-field of the velocity selectoivv8ol ho)u9e:/o. :jf zth9; qka4yxr has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?