If the north poles of two bar magnets are brought close to each other, td; +et: v,vx0uf9z/)wh tfmu the magnetshetx0;9/t:z+t vdwfu f)u vm, will

  If the south pole ofz6mdp+ ;,xxyz,sy60byk qr4hi rk):q wk ,;ga one bar magnet is brought near the north pole of a second bar magnet, ,d0:by+ kky; 4 ,p6gx; wqzxq,k my6)zisrrahthe two magnets will

  If a bar magnet is divided into tq:mq. u.ocsp* 3sv sn7wo equal pieces,

  The Earth's geographic North Pole is ma0o;d6nagyp o5dgr7dc 9q6w w:gnetically a

  The south pole of a magnet poo+x-+ukw,. l fjqjtg3ints toward the Earth's

  An electric current p c sf z6:yqnbdv0cgu6d:hv34 5 y/g:grroduces

  Which of the following is correo 7, :ywtzl og 1zo)sd.kbjf0-ct?

  A vertical wire carries a current straight down. To the east of j/of9vb:b qo/ erx 0: n.a/pmuthis wire, the magnetic field /0bob v.pnm :ao:ufj9r/qe x /points

  A horizontal wire carries a current straight toward you. From your point of vieh 1qi5aw f0hd+uul:d )w, the magnetild 0+uid1 wah5qu:)fh c field caused by this current

  A current carrying loop of wire lies flat on a table toef5ot/)cy86z i 7trqjp. When viewed from above, the current moves around the f j7ct t y6/5zer)qoi8loop 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 optr 419awajih-fydsq 9r)2z 7 n a table top. When viewed from abov)99rzfaqs 2wrtiy-j p7a h1 4de, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic8 p+ca )o 7sju9y;sd0bl wlth:b,/iga c)ll;f field is the

  1 T is equivalent to (zu d9mtjfve0 y4:vg2u(dxz-, vla2o

  The direction of the force on a current-carrying wire inxt4xeq lu-a23b- 5a dh7mhd6i a magnetic field is described by which of4h7atu-m dd2-e ql6bix5hxa 3 the following?

  The force on a current-carrying wire in a magnetic field is the strongest when2uex+dc wp.)yo8 5 hor

  The force on a current-carrying wire in a mag j*: aooj4a4l8dw/ge fnetic field is equal to zero when

  A vertical wire carries a current straight up i- -9uicvp.w0dl b(moin a region where the magnetic field vector points duc-ulbpd- ivo i.m(9w0e north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magne0jeh os0r:8zxxpdf l /kg ,3rcc90u,p tic force. From this we can conclude kpx g s0e/0ruj,f8 dxphr09z:c3, lcothat

  A charged particle mov;br.s r ,(2iutpgvnjn)s6r 3j-arv z0es with a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will bzr 62r. -ngs3p(jn0r ; a,vtru)sjvibe maximum when the particle moves

  A charged particle moves across a consta8m*,ie4qmyfchnv6 dz6. jl2g 3c(g tint magnetic field. The magnetic force on66f2cd(g vec4*m3,. hn y8i lz tmgjiq this particle

  A charged particle is injected into a uniform magnetic field s;*zq0ti/ g(,h4jkwd rp xpee/uch that its velocity vector is perpendicular to the magnetic field vector. Ignoripk,* r; jt /h4ee/zig d(0pxqwng the particle's weight, the particle will

  A charged particle is observed traveling in a zke9xx -y7)x i1(rw.xkho q, tcircular path in a uniform magnetic field. If the particle had been traveling twkxxywtr-(x. 7k1qhi exzo) ,9ice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular par1cqva9t5eq r6sdu2 fdtg;( i odz;y 8d+9m9jth in a uniform magnetic field. If instead the particle carried a charge of +2e, tao9 d+65;zu1c( 92qs9di8vm; ttyfde rgdrqj he radius of the circular path would have been

  At a particular instant, an electron moves q;:lz 1.woj dreastward at speed V in a uniform magnetic field that is directed strai :;r1ojwld.qz ght downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observk- zgs;ruz6,/ sb5ws s)vyv8ved to curve upward as the result of a magnetic field. The dig685vsv-sv ;,r kzbyw/zssu)rection of the magnetic field is

  An electron moving along (w0(k ,c5f obhg* r*gvsa3ke .cfw4trthe +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z ob5wgft gwkk3fav**h cc(0s (r, re.o 4ut of the page.)

  The magnetic field produced by a long straight currentmoj4 *a 1pqz c(/k p89bazef1b+n b3.ykde uh*-carrying wire is

  At double the distance fgz;c.;cvh2f2svvt :g rom a long current-carrying wire, the strength of the magnetic field produt:;vs 2vgccg;2z v h.fced by that wire decreases to

  Two long parallel wires placed side-by-side on a6z )two) b/bhwq j(i8*av2r jj horizontal table carry identical size currents in opposite directions. The wire on your iv2jb)8w( h*brta/ )wj zqjo6 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 side-by-side on a horizontal table carry identitdp i33g r5g1x mag8a:cal current straight toward you. From your point og3:53arp g it gx8dm1af view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The . pt0wt5 +fi bf3uyis(magnitude of the force between the wires is F. The current in each wire is now d0yp +3fw5f.tbiut( isoubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries currenmayp)0d 6 95d wiauja gzz :-j3je7nh:t toward the east. A proton moves toward the east alongside and just south of the ij09u-j ej)3d nh:dzwp6a57m :ayzg awire. What is the direction of the force on the proton?

  A wire lying in the plane of tho(x1/tmw 7zq le page carries a current toward the bottom of the page. What is the direction om(t/7xwq z1lof the magnetic force 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 wires are pla am.(dpf3r 3;qyy2 ibgced side-by-side on a horizontal table. If the wires carry current in the same df igy ;(yrpq.d3b am32irection,

  Two long parallel wires are placed side-by-sb z .gybax c7;q35l; ef2aso9iide on a horizontal table. If the wires carry current in oppositao gclf9 esz bx;75bq;iya32.e directions,

  Consider two current-carrying circular lq--b*65 0oksarwxadpc +2 nbxoops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compdr* bwoxq 5xc bna6s-kpa+2-0ared 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. Bom 01** jgegxei id3vo9th 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 moment of the smaller loop, the magnetic moment of the lard3jmvi o*ee9xigg *0 1ger loop is

  The maximum torque on a current carrying oxx;v uzls/,(loop occurs when the angle between the loop's magnetic moment and the magnetic field vect/vsuxzo, (x; lor is

  When placed askew in a magnetic field, a current carryie5 1) dtxgph-d)a 8ci wac6r(vng loop that is free to rotate in any directi)ixag -w8che6adtd r5v 1)( cpon will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all el,ss:nx81cd(s /g7o .qt lqivfectric motors /l dtosc:8q(sx if1,qg.7vns?

  A circular wire loop lies in a horizontal plane on a table and cakt)at 8.xfoe 9rries current in a counterclockwise direction when viewed from above. At tho9 xatfk)t. e8is 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 particle of mass m and chbf-llfh:4gj qp ej-tig +c)/0.xj c+earge 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 expressefhp -jg)b+j:-/.4 cgct jx0fi qll+eion 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+-sod-7 u: 3 wtgzntmn 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 then m t:g37u-doz -sw+nt magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.62og7aic fq0 s+0 A is oriented parallel to a uniform magnetic field of7sac2gq+0o i f
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 o9j app;1d72c12 l0d9/ uc nece8b;cwcswu vcA 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 carrying 5bp) l46vprwqsr yp 6,(u )r/gf.0 A when it is placed in a magnetic field of 0.020 T? The wire ma b w4sq (vlfp rug,6)rp/6ry)pkes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a masuz.l* 57eklhwkdiira:m x93+s 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 thix ra+m*593:wlku7hdike. l z e magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What i5yqel rtlsj :0;q;w4a s the magnitude of the mag eq4qj5;wlr; las :0ytnetic 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 spee,7 vv fnhze--qp8 ex0ad 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 speed or)4+b8sxt o ayf $5.0 \times 10^7 \; m/s$ 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 speed ta9kgygsb1/q)xq. 6q $4.0 \times 10^5 \; m/s$ 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 s93g ,f9n,hmnykex-gh9iy b4 wg 3 pjmj6*bh*bpeed 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 okg;2h7d d3uat y8w hj 0y0my1jf $8.0 \times 10^6 \; m/s$ 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 of0 1 ifun*h -n8yul+wrz $3.0 \times 10^6 \; m/s$ 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 curren;sae 8-rqln33uqrp d fpe,. p7t of 25 A. What is the magnitude of the magnetic field at ur73.d3na eqp ,r ppl8sf-e;qa distance of 0.15 m from the wire?

  A high power line carrying 100 c;/0,m y4)nmszr ovqn0 A generates what magnetic field at the ground, 10qmm ,os)yn 4 ;cvn0rz/ m away?

  How much current must flow fscd7d23wo pp.9z 8un lor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a l3pg+yj +lc6/ atf ai xpeqrfie(6*2t6ong straight wire carrying a current of 5.0 A is the magnitude of t*x3/i(paf t+eiefg+6caj q66 ty l2prhe magnetic field 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 currents of 10 A in opposite directegdh7 *bo*wb 5xe0ppy 5rr 8q.ions. 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 6. 80pe x hrgoqbd*we* yrb5p750 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 Ao5l kx w,ev9j6 in opposite directions. The wires are separated by 0.20 mvl5 wekx,69 oj. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A an):x2aeizusp; d 5.0 A in opposite directions. The wires are separated by 0.20 m. At what pueixs )pa: ;2zoint between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the samexx7+; kwkbo7.v i q asq)k+s(x direction. They are parallel to the z-axis, and they pass through the corners of q(k xqxx+7).wbvsa io skk+;7a 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 wires?

  Two long parallel wires carry c-gsy. )5dxbyu9 ey 8wcurrents 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 ty8gd5cx .yseu- )9ywbwo wires.

  What is the magnetic fie0w+3hda zm .7nznoj2th a;0ru ld at the center of a circular loop of wire of radius 4.0 cm when a cur2 0nzonz. jr3mt hhw7 aadu;0+rent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wx*.4pc1jdjx j: v4/r sg sk;xwire. What magnetic field is produced at the center of the solenoid when a cuvjsk:p ;/x 4*gxx4s .cw1dj jrrrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. What u l 9:s7skxjl;+)mmzy strs;)ll79km uy z:xjsm+ength of magnetic field will it have at its center?

  How much current must pass through) xb5 lufd xu;s4 qzk;,+zexb/ a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic fieldx ) z;fkzs ;/xe,dul5b4uqb+x at the center?

  How many turns should a 10-cm lon.t z-f*)dfxgz g 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 momen1hkk/cm: 4xu( ek:uvet of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 kxkuu :c:(ehv 4/ ekm1cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 07uywe v+(8vdl .30 T. The current in the loop is 2.0 A. What is tu ywv(8v+7l dehe magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sewv(6m bhki 3p4ctional 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 magneticjr0f /gx.5f 9)c oks cmzpp+i2 field of 3.5 T. The loop has9/f cmskgjrppo 20.5+fz) xic 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 rmxijf ,fl l9x.2q2sdd0(y 7f fadius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What fx 2d,iylf0q j 2fdxl.97 f(smis 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 is in a uniform magnetic field of 0.30, zc sy*wug9 dkfp.*w7 T. The current in the loop is 2.0 A. p ,9s*.wyzkudc7g*f w What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop ,.aw/zh d,w.ws;um:eci lybqz+ g8 1 vof 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 singltnli f d9v.j(5e-charged particle (charge 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 7*uwvkaya 3lg4.wwe+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 thro/ wcsms8;hxw3/ pmkr ;ugh a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting o3p/ ;hk r;wcwmxs8 s/mrbit?

  A proton is accelerated from restq ,vmjzte5fw* 1v:8ab through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it f 8fbt51jwe v*:z vqm,aollows.

  A beam of electrons is accelerated thro,b,oev6ap5b x7f (;va ijp. tkugh a potential difference of 10 kV before entering ap, v ;jat7,fva 5bp(bo6. exki 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?