If the north poles of two bar magnets are brought close to each other, the ra95h isftk* *magnea*i9 s ft5r*khts will

  If the south pole of one bar magnrt awo -hi(gu(wh77u0 et is brought near the north pole of a second bar magnet, the two magnets wi go(-hwh7 w7ar (tui0ull

  If a bar magnet is divide8e1 6 jzg o c 7t4v(:gtt/nwc0(zmjusod into two equal pieces,

  The Earth's geographic North Pole i e0jz plt2u (8pro(za(s magnetically a

  The south pole of a e2 v/n;o ( ku.okedr*qq9fek- 3rco6umagnet points toward the Earth's

  An electric current producesxxpe 0 cglhu 25t0n- h,o3a *8sanfg(n

  Which of the followi ;rg.ny xnkh16ng is correct?

  A vertical wire carries a current straight down. To the east of thisldys.i 47.dns wire, the magnetic fiel7d.s.iys n 4ldd points

  A horizontal wire carries a current straight toward ysp sm4s0x(e0 pou. From your point of view, the magnss(sxemp4p 00etic field caused by this current

  A current carrying loop of -eb a fiqn9m9l33w9y rwire lies flat 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 caused by this cul9 3aw 9n3 b9-ifmeqryrrent, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table tqm.ab8 rb zi8(op. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field q ma8z8bb.(r icaused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field ic 83kvtk luv73bn99 nfs the

  1 T is equivalent tooh: a 5u6h g)7pskrr z4ee.ae0

  The direction of the force on a current-carrying wire in a magnetic field is des6r-a1ig v pe-wcribed by which of thevae-rg 61w p-i following?

  The force on a current-carrying wire in a magnetic field is the strongest when- swdlf y1/c:m

  The force on a current-carrying wire in a magnetic fhzj s6)6d5hkuield is equal to zero when

  A vertical wire carries a current straight up in a region wherer. +e;prx1z i rsk.8s.9blozc the magnetic fieldsolbs.e.k . 19xiz+z rp8 rr;c vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we ,:h)hzcz1iocj 4s; dxcan conclude that )iscdx4 zhj:;och,1z

  A charged particle moves with a constantfxpn+ jn/fa*/;e)qs:w zd nszjn3*k ( 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 ben*q/3n z(xake)j/f jn wszn+f *d:p;s maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnecs)nwlwcy egh 2n6 ;rt- -1l*ttic force on this partic ;ceh-c)16l-tywslr nn* wg2tle

  A charged particle is injcl4rzeu ;1 *h7jj*il uected into a uniform magnetic field such that its velocity vector is perpendicular to the magnrj14u*l 7 ;zuelj*hci etic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling cwf-. wo-s ri)in a circular path in a uniform magnetic field. If the particle had been fs w -ci.-o)rwtraveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circulaoer e.8+ie5pw96bh fhr path in a uniform magnetic field. If inst.e 5 wif+hp9ee h86robead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, ydx l;azvg1qidrp(2zn+ wr0f6 p+ n57an electron moves eastward at speed V in a uniform magnetic field that is directedzwv+i1(0d6pn+5y d q gla7; 2prz rnxf straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obsi+z* jiv* +wbrerved to curve upward as the resuwr *+jzi +*ivblt of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a f/j(q9aot6c ; ybnt-u region where there is a uniform magnetic fi9uq- ctj fnt;/o(6a ybeld 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 sj-o3 tctc;i lzv:j7;htraight current-carrying wire is

  At double the distance from a +a yz:n0o4jhqvyra; 2long current-carrying wire, the strength of the magnetic field produced by that rhyz 4j2 +vyo:q0 n;aawire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry identicib8 lm,gt ur i-:wpb,)al 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. From your point of vil -bbu )g w8ti:,rpmi,ew, 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 identicar7rf7 u;j;v kfl current straight toward you. From your point of view, the magnetic field at tufkvr7 j; 7r;fhe point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betf )8;qxm ua ha.7lbih-gri;gxny.0j 0ween the wires is F. The current la8i. nh7xga0f ;m.i b j hx;yg)0uq-rin 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 eas) ;8cxm zdo4dmt. A proton moves toward the east alongside and just soczd4x8 o)dmm ;uth of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom of thxo)d.qhs.dib ,y 68fce page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly towah8o i6f..bx)d s,yqdcrd the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal table. If the wdmjeoyc u kkx+mb5+(r)a po z3kr7+(1 ires carry current in the same direction+ y1bkmk++o)rrzda 37k( ocumx j5pe( ,

  Two long parallel wires are placed side-by-side on a horizontal table.wj4vu mi0z6, q If the wires carry current in oppositemu, j4i60 wqvz directions,

  Consider two current-carrying circular loops. Both are made from one strand *mb0juw07 h9 knp)og fdxz:5bof 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 field at the center of the larger lombz)ogb f kw:hun05d0 j 79p*xop is

  Consider two current-carrying circulz yli.b;- d q3jz-k*igar 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 magzd.q y;izkgl *i- j3b-netic 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 betweenae5zuyt8r :oar 4rd w-:z -ld2 the loop's magnetic moment and the m w4 :rat or-2ezz:alr8-yu5dd agnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is fd j).bpozlz-2 ree to rotate in any direction will experience a torque until its magnetic moment vlozj)b.p2 d -zector

  What fundamental fact0)qd sfey c:2 ) su-m.stru+lg underlies the operation of essentially all electric motorsc +fgs quy- 02.u)setd)m lsr:?

  A circular wire loop lies in a horizontal q xwo7z5ya9 v7(zm* etwq cy33plane 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 toq7ezaz y3t7yw v5x3 q9cm( wo*rque caused by the currents interaction with the magnetic field?

  In a mass spectrometer i 6 lyul7fl7r-a particle of mass m and charge q is accelerated through a potential di l77ryuif6l -lfference 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 particle in terms of B, q, V, and R.

  A velocity selector consiststfwmq9 *l68rm e:qdo sml ;2q- of a charged 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 magnisdl-: 689rofmw2eqmq* q;tlm tudes 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 paralleyfg i*/cycq-0kp42 fd l to a uniform magnetic field -fd2k4i/p0c yq *gy cfof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curren2 w1.4 wdnhhqht 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 straightm; vlrl)sgp1s( 2 lt;b wire carrying 5.0 A when it is placed in a magnetic field of 0.;1bp 2 lv;(lgss)m lrt020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.ww)0z0j uvs /f0 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is nee/z)v00 u wjfswded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the me d k5wr)ckb2-agnitude of tk c-e2)wrbdk 5he 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 speed )-zw6l hrv;ku 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 2vaq ;rl b,zl0a speed 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 d6wzjmc p6 ohy yeq)vik43- ;u-ue 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 spek 4 nz*xka.s2ewc(nw;4mbk0yed 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 of fyh 3t+4dsx6e$8.0 \times 10^6 \; m/s$ 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 oh0dsorobj0 ow25 .vr)f $3.0 \times 10^6 \; m/s$ 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 carriehe spbd(d dkz2).o (0oj .8wqus a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.1.edqd hpdw0b. ozuso(8k(2j ) 5 m from the wire?

  A high power line carrying 1000 A o5q nead o 8-7vu31rtigenerates what magnetic field at the ground, 10 rv3i-1und5q7a e 8oo tm away?

  How much current must fln9zqa /.sgzg 0ow 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 curr n,0q hs4ghdr9ent of 5.0 A is the magnitude of the magnehd 09 shrgq4n,tic 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 idc0s.pu((+y tn .eni kn(sc* fn opposite directions. They are separated by 40 cm. What is thentnns0kc+i e(p.s.c (yd(* f u 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 7g9guly 1r47giy 3qbq in opposite directions. The wires are separated by 0.20 m. What is the magnetic field y94 l31irbqgg7 qyg7 umidway between the two wires?

  Two long parallel wires carry currents of 20 t in qogpyflpot:zpwz. hs5 d + a5.k8f.5/51fA and 5.0 A in opposite directions. The wires are separak f +oz5q8ta.yf5it5pnw1s fhg:/zd l.pop5.ted 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 direction. They are xt;w5e*/ rx suparallel to the z-axis, and they pass throex s/x ;wurt*5ugh 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 currents of 5.0 A and 8.0 A in the oppositejib3h v :zp4j.4yss vdy6)w 0k direction. The wires are separated by 0.30 m. Find the magnetic force pekhj. y wsj4 63:pysbz0dvvi)4r unit length between the two wires.

  What is the magnetic field at t:. trqz(u ia5vhe center of a circular loop of wire of radius 4.0i uv .5:atqzr( cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 tudpaz+4 dq03* prr8ffc rns of wire. What magnetic field is produced at the center of the solenoid when a curq+rrz0p* 43f8 cap fddrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a a1eux6x .4mndkxa+ , .uc8zzzcurrent of 4.0 A. What strength of magnetic field will it have at its ce c k+dx.u z,u.mz8z4 xa6ax1ennter?

  How much current must pass tw kkg olec4h5w, h7lp*1g-av69z+ xezhrough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at th+xeg,-hlp79v45l1 ek 6wkzh w aoczg*e center?

  How many turns should a 10-cm long solenoi,pdofoj ,(: kud 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 rectangular loop of 120 turns t(6 pfhwl15 tl qt1-0hhvlyf;shat carries 6.0 A if its dimensions are 4.vw- 5 1lphfl061tfy;(tqhls h0 cm x 8.0 cm?

  A circular loop of wire oop+ cb* g+br7dp04f stf radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loo47 pgpsfbdt * 0+o+brcp is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wir2 hm-lb,pl ay6e of 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 magnetikrq/-h8 ,cxhvtj zz m 5;d,f1kc field of 3.5 T. The loop - thv8d f1 kz5rczm ,jh;q,/xkhas 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 uniform magnet2qq2heikqbquw0i9,yc * 7 hd0*o 7qotic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop09h,h72qe7 o0tqy wiu bdo ck*qqq2*i is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic z v76t e.z0+sqqgru0y)kt 1 qq59i opsfield of 0.30 T. The current in krot g5z e9i7qq1 0tp+sqsq0z6)u .yv 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 o,b5v ;* ioax wrwg 20h-mi4ldvf 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-ch84t ;9zm ,nw4 rs/embih-s cwharged 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 velocef*cy,ka s.mk *x2w) vity $6.9 \times 10^6 \; m/s$ 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 int vjw:ms5o0w+yo a magnetic field of 0.040 Tyo+w smw: 0v5j. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fieqb r;rd2oj 9e)cb6/itz dd, z2ax x7,wld of 0.30 T oriented perpendicular to its direction of 9cdtwqdd bbz,);7rx xi6ajo/,e zr2 2motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through:0wl uksjm .crrq xvu)g)ctv+ .)2x +p 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 valux2v )kwt+uv ).ur0prjmc+c)q l:.gxs e of the E-field is required if the particles are to be undeflected?