If the north poles of two bar magnets are brought close to each othw99r wh,r-auw er, the magnets wa -hu9,rwr9wwill

  If the south pole of one bar magnet is broughtun45 ow,dt uiqk2;(c a near the north pole of a second bar magnet, the two ma5(,4 tiaow kuq2;cdungnets will

  If a bar magnet is divided intwzxq t x4wnvro23cjh-k )n(9 5o two equal pieces,

  The Earth's geographic North Pole ism1g pdlj o0z8s;ww.6.yz 2dtr magnetically a

  The south pole of a magnet pointdk)k 6q- q1 babs+xdt3s toward the Earth's

  An electric current producesq2p 5)l ee8 bo ,:znyo(yihts8

  Which of the followingyr*6/ir np 6 dxgt04du is correct?

  A vertical wire carries a current strai6atgy53l2u4cm y7,y 5ae rddbght down. To the east of this wire, the magnete ud7b 23g4c,6lm 5aryt5yy daic field points

  A horizontal wire carries q cu7iz)) do/yq)+p;y1 *xm8suvhvy ka current straight toward you. From your point of view, thezy )d*k/yvvh)1q;8uycu q)o smip7+ x magnetic field caused by this current

  A current carrying loop of wire lies flat o2 pzkpytw ty/pjj/9 .1n a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of thew9yj ./2k1/ ptpjzypt magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies fluqg(dh1 ppsm nj605g17kr*k w at on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field 1k0jk7gd 5mh6wgq1r n*pus ( pcaused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field exkn.sy/o 2n 8is the

  1 T is equivalent to3 a.m0 sezs:( sdgewmf: w)yt-

  The direction of the force on a current-carrym5 di)q34 7efrb3h zrying wire in a magnetic field is described by which of the following d 4h37frrb3z mqe)5iy?

  The force on a current-carrying wire in a magne7 6t3 kyuvb58qzpun),ye k+ vptic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero a ey:) ,.kp7ttuy 9lwjwhen

  A vertical wire carries a cyurjg5(us4 ,p urrent straight up in a region where the magnetic field v54p,g js(ruu yector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no (+u ;rmk)hrsd magnetic force. From this we can conclude tha)rs hk+ru(d m;t

  A charged particle moves with a constant speed through a region where a uniform6 w.ifoi4jli * magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this pa4iil* i.f6wjorticle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. o4*hlquc x9 zq gvr1cj(; r;s2 The magnetic force on this part4v1 r*c 9cqqug( jx;hsz2rol;icle

  A charged particle is injected into a uniform magnetic fiel sl5zkngo(zvour ix* /56 :ol1d such that its velocity vector is perpen5*ruv:(zl/6zoxno 5 ok l1s gidicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path iz-h8k r8bza8jz+ -wbpn a uniform magnetic f8zp+aj-b k-rhwz88z bield. 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 a circul2puhpt6d-o-*)2zq kebudmlem7+t t r1m if80 ar path in a uniform magnetic fieldter f+tpmmmud *172 k-o 6iqzb8 0-lu2)etpdh. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a37r gr ofxq8m;7nl h:rrz6i3ux8. dbf uniform magnin 7z6ql8murrof.d bg hf38;37xrx:r etic field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed toili5kne:2f1/ w m7,yac 3rrfhkba4n, curve upward as the result of a magnetic field. The direction of the magnetic field isafab1:n5 irhr,m27/k 3,yefw kl c4 ni

  An electron moving along the +x axis enters a region where there isy6z..8wc8 j7azteqm m a uniform mac m6.ema j.87zzt w8qygnetic field in 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 straight curre jb xx4c4n 6aos/z)nh3wz 2sz0nt-carrying wire is

  At double the distance from a long current-carrying wizpt (zc g0gzvh, b7i*+ky4g8b)f/goz re, the strength of the magnetic field pig+ y vk/ gz0p(b7bto)*gg8z4h,zzc f roduced by that wire decreases to

  Two long parallel wires placed side-by-side on a 6vg/pcvlzejzgl3 .- + horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carri6. jpz/-3lgvczev+ gles 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 hhfmw4) awfe8*/b,5l um0sr j3xnps+r orizontal table carry identical current straight toward you. From your point of view, the magnetic fieldu4mf+*j lef8 wmx),3bs prsnw0r/ha5 at the point exactly between the two wires

  Two long parallel wires carry equal currenb4b7,:yjpz eajc69ch ts. The magnitude of the force between the wires is F. The curr4 c,7jhj:ec9 bp6abyzent in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves toward tn)s9 :1rhiof+wyee k)he east al)yse k roenw:i1)hf +9ongside and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the planx/9 5huzzmhmfb9m1 ld.3is k/q 2,zeee of the page carries a current toward the bottom of the page. 9 3bk9fel xdzz/uh/.i5 qh2m z1,smmeWhat is the direction of 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 placed sideva zr.w/nd glbo,35e/ddg7 u.-by-side on a horizontal table. If the wires carry current in the same directi/ z,oed3.7v/.wdru n5bgalg don,

  Two long parallel wires are placed side-by-side on a horizontal table. If t hpql23mpg 6x8he wires carry current in oppg36 p8lxmhpq 2osite directions,

  Consider two current-carrying circular l wm36c(9poi6 f2 42qiusuagpgoops. Both are made from one strand of wiaf6m6 g42woq uipc gu(sp239i re 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 field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are m45q durv. .jepw5roe (ade 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 magnu54pe. oe. r5wrqjd( vetic moment of the larger loop is

  The maximum torque on a current car pdkt:p* yr/ e:3r lp,)vhmi2arying loop occurs when the angle between the lo3)tm p hr/i *,k:vl2d:pyrpeaop's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop ma+ ;9f,/v k xf8kyndothat is free to rotate in any direction will experience a torque until its magnetic moment omkf+ad/f8 9,xvynk; vector

  What fundamental fact underlies the ozepee* y73m), eip/ujperation of essentially all electric motors)eem7p,*i3j uy z/pee?

  A circular wire loop lies in a horizontaw pj.6v1-muf (. ejrfw3kfmanz :k*h ,l 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 lift off of the table because of the tohm6j:w k 1v,.f*- m3 ff(jz nwuekpra.rque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated through pzg 3m-t u2e*tlm1k)ra 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 parte t31) mtl*zrg2u- mkpicle in terms of B, q, V, and R.

  A velocity selector consists of a chaovq q+.s* ,og:vyr bx(rged particle passing 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:+qo,(v*g qyosvrb .x 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 q6:6xazoy;v f 59jbjucurrent of 0.60 A is oriented parallel to a uniform magnetic fiely5 jvquz:a 6f xj6;9bod of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 j /.) )n ms(wjbxqg;maA 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 metew/ qcqxh 2tb7rfx6q5 rd i(9r1r on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 Tq6 wx9/b2trqdxf7 hic 15r(rq? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m +r prh/zn52:ph gxg g4long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimu xghppgrr4n: g2/z+ h5m 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 field s0v0co4v o 2boof 0.20 T. What is the magnito40bs0vcvo o2ude 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 wit/jo)) o fhm qu8lair wu7hi1m-euecw7 v+9h-8h 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 speed of 15/ 4e.mr ;a-uu iojzksdn0ih 5 cow,f$5.0 \times 10^7 \; m/s$ 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 with3z0du3c ere0e7 cd(tz 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 smed)zr h./rqsc26z h, peed 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*13+n5ftbl sjpao p s/ 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 n0 3*e mb an/hswgmz6ab-u1r9 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 w po0 yd-p-p (lo f,7r l:rsmhks/zqs8;ire carries a current of 25 A. What is the magnitude of the magnetic field at a distance r0szf7 (p doqo:slpmy8 p s-/r;lh-k,of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at t z9n)z-ebk2tf6 qx5y whe ground, 10 m a5yb )-wexztfkn6z 2 q9way?

  How much current must flhqk/i;uv)o6sxs a3p1 jy96b9kw3lgm ow 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 cuq *rph0f; 4+f0ndggzh rrent of 5.0 A is the magnitude of the magnetic fi* +4 f rqf0pzdng0ghh;eld 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 curreio3l 1u tj bwov,--/8ehrogn3nts of 10 A in opposite directions. They are separated by olor3v1bj/w,u -8h3 to-ieg n 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 in opn 4 znif31dlfe(cie;+/sxa +gposite directions. The wires are separated by 0.20 m. What is the m d3s;xglnnz/i c+e+4 e(afi1fagnetic field midway between the two wires?

  Two long parallel wires carr:-:3or;o fyqb f 0btpuy currents 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 contrib:; q0r-bootb f3py: ufutions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. Theypgk 7q*svv,-a 0tz 5vymdq.,.7 :yyr f5mn byr 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 magneti-rt55vq7yn0 mab.ps r zg.* q7m v:,kyvd,yyfc field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents)pub m.k5 :rjbgq m99wp1uu5j 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:.j b 55m)r1pbw kum9 upqugj9 length between the two wires.

  What is the magnetic . k;pb;qpomuzc7v)cb 4ap;e8we0d i. field at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows 0.cv; e) op 8qipbp;zdbuwe7 a.;ck4 min the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fishoe;ni6 ,pa kwj )8k4eld is produced at the center of the solenoid when a curehon48)6wk,j i sk;aprent of 10 A flows?

  A solenoid with 500 turns is 0.10 m longe /t6(2qwaqs zw 8zkos9f x,c3 and carries a current of 4.0 A. What strength s/ 2k 8c3fw,(6es qazz9t xoqwof magnetic field will it have at its center?

  How much current must pass through a 400 tury7ck)2 i3)e;tr3l epfz ih)vzn coil 4.0 cm long to generate a 1.0-T magnetic field at the center?itv)e;)2fer73zh ip) y clkz3

  How many turns should a 10-cm long (mg1w;c7u 9z3ds arzlsolenoid 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 cf4-+3d(1gbsihs ,znw- xo) cjxn 5olmoment of a rectangular loop of 120 turns that carries 6.0 A if itscxndi g4xfn-c,( h3 5wsbo lsj-1z+)o dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fielvd(c ru f5r(puhge./(d 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 perpendicular to the magneti rrdef/(vu.h (ugc5 (pc field?

  A circular loop of wire of cross-sectional are qpcj9byv*+x+: gz h4iyah-*ua $0.12 \; m^{2}$ 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 magfirhh*q8 (mz 9 -ngxh/netic field of 3.5 T. The loop has 9r* /h8 fg-mn qxih(hzan 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 magnetic fi+:b w5xltg 2theld of 0.30 T. The current in the loop is 2.0 A. What is the magnetic x5ttw bl:h+g2torque 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 0.30mr 0t-. gxh;oj fx)o*i T. The current in the loop is 2.0 A. What is the magnetic torque when the plane- xo.jix tg* hf)0;rom of the loop is parallel to the magnetic field?

  A circular wire loop of area df+ *s8hm5v /rmnzvn yl+5l2cn0- hy l$0.25 \; m^{2}$ 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 singlo ,nie) yc)ej5e-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 velokpa1bws fto,c59 ly-3 city $6.9 \times 10^6 \; m/s$ 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 potedz(xa3 k9;)3 x)l+c zm+ mbx:frtqfuwntial of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting orbitwm9zbu3( lr m x:cxfd;f++t) xkzq)a 3?

  A proton is accelerated from rest thro/ )rdh. ,th 6)* wa8wyeajj- r;ywotenu;s:y iugh 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 fwe -eo*as/8hn.;rdy );yt:6a h, t juy)w wjirollows.

  A beam of electrons is acch-8 q, ymtto5selerated through a potential 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 of the E-field is required if the particles are s m-t8q5 yt,ohto be undeflected?