If the north poles of two bar magnets 8 napo:szw hou;6g(s,are brought close to each other, the magnets wo(:usp;ao, zwn 6hg8sill

  If the south pole of one bar magnet is brought near the north pk iua)0 e5mp ot1i90uo ikyk59ole of a second bar magnet, the two ma) k9 oke opi095ky 0mui5uti1agnets will

  If a bar magnet is divid4kl) 4 o:ddvk6t;)oq9cs* upwnhdy h *ed into two equal pieces,

  The Earth's geographic North Pole is mat j,g0ol2xy l3gnetically a

  The south pole of a ma ahp5 w9jn9:ilpc 2kx2gnet points toward the Earth's

  An electric current pu 3-xle0 ps.oproduces

  Which of the following4zkf +-czo;m wer-* gg is correct?

  A vertical wire carries a current straight do:, bn2xvq:r xl8 ovy wsr(:sa5wn. To the east of this wire, the mr(nv5x2: 8:bxq s,:rs olwa vyagnetic field points

  A horizontal wire carries a current straight toward you. From your po( r+w-6mt xx4c*xl myzint of view, the magnetic field cacyz mxx4r tx-w6(*m+ lused by this current

  A current carrying loop of wire lies flat on a table top 24 ncvt3chr,hg9 u5um*i0ijt. When viewed from above, the current moves around the loop in a countercm hvj n40hcir*5 gt2 ,itu93uclockwise 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. Whjbs(5jhj8e dda8uxupw7r *+ ;en viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this curwjr 85ehpb;( j7d+8 xsajudu*rent, inside the loop? The magnetic field

  The SI unit of magnetic fiel 2io1 vavc0em.l c9ja:s6qz 2zd is the

  1 T is equivalent to yy*38km,u yfq

  The direction of the force on a current-carrying wire in a magnetic field is de;1m u fd,x.ann4vcj* hscribed by which of the followinm h*fn. d,1;vjx c4anug?

  The force on a current-carrying wire in a magnetic fie*lzodlxo f, y-rw(b; 1ld is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to kg*qmr+u1f1 t 6 cs)yb qb39hwzero when

  A vertical wire carries a current straight up in a region where the magnetic 3bzq7/tu y0dpu04w *uk*)nigyi c rs3fielcp34 t yu7q ykud*n0*b/zi3gr u sw)i0d vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences nsopie8 lg4sv/109;b 3bw ptscwe2rh)o magnetic force. From this we can conclub8)wgb9iols3hc1evwt4 0/ress2; p pde that

  A charged particle moves with a constant speed through a region where a uniftcp5.m12vka 31du*utd9 xvvkh7b 7m swbu; ;n orm magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle 9bpv2n*7bskdt 5m1 da v1uut kxh7cwu;.v3; mmoves

  A charged particle moves acmw(quvd5xxa b1(/v q1ross a constant magnetic field. The magnetic force on this particl/15q(x1aw d vqxu m(vbe

  A charged particle is injected into a uniform magnetic field such that ittxs h9,w 6s hcgb-i9j,s velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the parti- hih9jb,96gtxwsc ,scle will

  A charged particle is observed traveling in a circular path io..3wnyesm 991ziq: kkua--om 6li hg n a uniform magnetic field. If the particle had been traveling ylqwuomii1hk3e 9 -az-.s gok6 .m9:n twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path)x7vud gm(j e2 in a uniform magnetic field. If instead the particle carried a charge ofdxemgv)7 2 ju( +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed Vvbmte3,wj .7*z nv1 qp in a uniform magnetic field that is directed straight downward. The magnetic force that acts on p.w,evz 3qm*bj 7vt1nit is

  An electron has an initial velocity to th)on1 owm3-6twzoqax 1g 6ok;ae south but is observed to curve upward as the result of a magnetic field. The directiox3 kw1o6qoo; ng1- wa )aom6ztn of the magnetic field is

  An electron moving along the +x axis enters a region where there is a uniformzl1gd -4l8foilasj fo)(8 ao; magnetic field in the +y direction. What is the direction of the magnetic force on the eleos-;zf 8(f j18daa oill gol)4ctron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carryzfbl2 8y3fu;i 3 ym42zo y-chuing wire is

  At double the distance from a long current-carrying wire, the strength op5pcoli0 2fio9jxvd:z (a7b .f the magnetic field produced by that wire decreaslof2z p.a : xd b9jov(0ii57pces to

  Two long parallel wires placed sidekuw) phc8.; ke-by-side on a horizontal table carry identical size currents in opposite direk).uwhpk;8ec ctions. 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 pla4l: q/5uuhfm+9 eig vuzuc) ;lced side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the 4lfc:/u5ui9)h mluezgqv; + u two wires

  Two long parallel wirnh 6v.*tbgyaq60 g im)es carry equal currents. The magnitude of the force between the wires igyn).b itqm6 a0*ghv 6s F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire cb 1,bg 4vfptbfq;0cqu8t: w1 warries current toward the east. A proton moves toward the east alongside and just south of the wire. What4fw 1cb b q:0b8ptt1;wvfqu, g is the direction of the force on the proton?

  A wire lying in the plane of the page carrih9s vi2deiqcs x c;2x 89(m6zfes a current toward the bottom of the page. What is the direction of the magnetic force it fm sc ie2;(hdv92 8xzi cqs96xproduces 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 side-by-side on a hori y )q;que o/5v8s v1tnvn5ts:kohe0dls9 2u9x zontal table. If the wires carry currents 1v58xn9sn os;2 uq/9dyq:tv0he kel t)ov5u in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. I dg ir)sh3t9pxu )86xmf the wires carry current intr83)xipdm6 9xsug )h opposite directions,

  Consider two current-carrying circular loops. Both are made from one strhmzhnca6( g+ 8and of wire and both carry the same current, nhma+(6czh g 8but 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-cqly/957k-es -kmfnxe,t k a-n arrying circular loops. Both are made from one strand of wire and both carry the same current, but one n-7knxe-,mq-atkky9esl/ f5 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 loo73 k 2 ar1r*njq5nyhwwp occurs when the angle between the loyr7 1nnk3h *5awr2 wqjop's magnetic moment and the magnetic field vector is

  When placed askew in a*x o5m3y zfscsue0l4) magnetic field, a current carrying loop that is free to rotate in any diy 0mu3fs4* z csol)5xerection will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation0 h.r7ilk )zqglvnlea*f, f3* of essentially all electric motors?qlaz ff ) i l*e*0.vh7,g3nlrk

  A circular wire loop lies in a horizontal plane on a table and carries currul pr:agj.*/+cq+f .wu,in3qr eoa/ uwk3 ) jpent in a counterclockwise direction when viewed from above. At this i* o3 anq:qlrwf, /pr+k)upu .c/ue+ 3gjj.wapoint, 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 particle6rwo;i)cu/xen 6k 4 xi 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 perpendicular to the velocity of the particle. Derive an expression for the mass of the partx )x/;4cn66e wroiik uicle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle pas /kdmvch1ch v54 7ie/osing 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 liv5dehv 4ch ic 7//o1kmne. 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 0.60 A is oriented parallel tbg4c3gk3 yuvf p8+b bhec6 *r1o a uniform magnetic field oub6bpgkh cy4* +fr8 vcb3 3g1ef
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direc 9aednyk+ +2qa5 u-jgction 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 stravaqou.vuze/+ 4; k;uwight wire carrying 5.0 A when it is placed in a magnetic field ov.u/;uezw a+qvk4 u; 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 long has a mass of 0.050f3re.nfan1 0h kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic for f.nnrfa13e h0ce to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T .f4gg9lsz (kf. What is the magnitude of(f4ksz g9g l.f 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 sk2 t /ic**6lx/kk,n bukp;pwe peed 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 vm. jl.7ipi 7t2r j5raof $5.0 \times 10^7 \; m/s$ 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 no znaw(3 +4aexhrth 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 ;5gleva7r,y (fn/c zcof $8.0 \times 10^6 \; m/s$ 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 lc hvd m2ehx4ed*b 5w2g4:a*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 speedhj ;yweciihmvv+ 2x0zp k/.2. 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 i2b ezqp7;a:pg s3-b mns the magnitude of the magnetic field at a distance of 0.15 m from the wirebn eqmb7:s gz3p2pa; -?

  A high power line carrying 1000 A gy x k-(.eun5bfs;1 eslenerates what magnetic field at the ground, 10 xu. lnessbe(5;f- 1kym away?

  How much current must,ta mzch,iv x3yf 38;:c1wdzh flow 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 is the5 e,r8wm tk h4cg +vkfo:)kxmve)*q/u magnitude of the magnetic field due to the wire equal to the strength of the Earto4m+vc exq, /:e g) fhmvt8k r*wku)k5h's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry ckdm y-xk;d: 9jurrents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the9 yk-k:;dmjxd wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wiresvx2 x34d79ci+h l ioeifx1i8 i carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between t7c hd3vx9 48 xeifxo+i1li i2ihe two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directio ),.d bv/)itaqws bmf)ns. The wires are separated by 0.20 m. At what point between the two wires are the contribuv .ib )df),a)qtswb m/tions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are parmw y;: ufj:q9lallel to the : m9y;f:uljqw 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 wires?

  Two long parallel wires carry currentaxlqr .i 6l2 )vc d9y5nqq-j85zck;d zs 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 y)-zq2;ixc.8clzq jnrak q5 v56d9dlthe two wires.

  What is the magnetic field al lnz e32+w(aqt the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in thea3+leq2n l (zw wire?

  A solenoid 20 cm long is je3n8dt;xm-bcy;z e/wound with 5000 turns of wire. What magnetic field is produced att;y3en /;mb-xz8 d cje the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 tu hrcqfe; hnoeqls1-+5)/ )rquvdln x f.)cs// rns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have ad5v+c hf r /u))q)./qnoleqs/e x fnhr1l s-;ct its center?

  How much current must pass through a 400 turn coil 4.0 cm long to gutv.- (big4f senerate a 1.0-T magnetig -i4t (ubfs.vc field at the center?

  How many turns should a 10-cm long solenoid have if it vzv / wfosi .2w6-ua1swt4 7rdis to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangumwn.x(h )- mlclar loop of 120 turns that carries 6.0 A if its dm(l nhxwcm).-imensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fiez,v;i :yj u5hpimjty/h4kd 3g 0 jh08nld of 0.30 T. The current in the loop is 2.0 A. What is th d0y y i8j4:mhjzp;nut /,vjh305gikhe magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectiona xpvf *08e+ygh x8p8fwou0ld 2l 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 cw 9 6wqp/egl3akd6+uburrent of 2.0 A is in a magnetic field of 3.5 T. The loop hakgudw+e6a 9p36wqlb/ s 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/ nucr( x1d- (vej7sul uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is tjx/1 ed-nuc(r 7v sul(he magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m qr)r :cwiov 5nut, : g/,ccq1id5m.xyis 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 parv1t ,q):: 5,ccndcm.w/i r yiqx5ro ugallel to the magnetic field?

  A circular wire loop oe85a cnttq,s88rqnz. f 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-chargeb+ iux*dtoqg,k0z :u 6d 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 vel-*5 g7 cvkcdffocity $6.9 \times 10^6 \; m/s$ 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 thry7k)f 5.jm zmfrt6cl3*l b+ kqough 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 resultingmm)3. brfk6ly+q5*f kjtc 7lz orbit?

  A proton is accelerated from rest thro ;sm4 796/gtosttdfgv 1 g6eyuugh 500 V. It enters a magnetic field of 0.30 T oriented perpendts6e4td guotsg1/myv6 gf7; 9icular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a poten b, 68n((6zo ;mf,ubnpgvdo dltial 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 part up,d6vbol,zmdo;( nb6 fg8 (nicles are to be undeflected?