If the north poles of two bar u1ieg )ij,+ kdf -wa2nmagnets are brought close to each other, the magnetse +ui -n)w i21j,kfgda will

  If the south pole of one bar magnet is broeyc6 qq2t;*xhubehb-nv; h:-ught near the north pole of a second bar magn; *6hbh eu-bqh:t ;qcxvny e2-et, the two magnets will

  If a bar magnet is divided into two equ*j+m jcy lsc+i*i8.pa5j7 aah al pieces,

  The Earth's geographic North Pole is 2* j6w dck* hig+lqly1magnetically a

  The south pole of a magnet points toward thq72bgdghf( i /e Earth's

  An electric current producvweo jt:8b2bqp)pq15 es

  Which of the followingx *ketb1( h6he is correct?

  A vertical wire carries a current straight down. To the east of thi1) 2m4edh*lbwsq+)sr m vq ;x+sg nfx5s wire, the magne +qxm2q*)s4h1evx;swd+5)sg rfnbm ltic field points

  A horizontal wire carries a currentfsrz31rls b7ya 319dc a dx:l. straight toward you. From your point of view, the magnetic field causr:.1 syflldda 7r x z3bc19sa3ed by this current

  A current carrying loop of wire lies flat on a table top. Wh dcq55v y3:zdven viewed from above, the current moves around the loop in a counterclv5z c5:3q yddvockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circul p ,se245ega, rgad 58uxx23rskrj:jlar loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. j 2rrsj x r:ax es 8ku,345lg5dpe,2ga What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnet76phte ;yorj gq(h.sd61uwos), y3k gic field is the

  1 T is equivalent torekq7lyjnk; )4 93tk t

  The direction of the force on a current-carrying wire in a magnetic fk3r2m3w l0k7o .cqlo rield is descrwrmolr3l. 3kk qc270 oibed by which of the following?

  The force on a current-carrying wire in a magnetic field is the strongest vxdubdp0 524 bwhen

  The force on a current-carrying wrk3wvd5d::d f ire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where th ;(l4 5pzxyikzp-m ea.e magnetic field vector points due north. What is the direction of the resulxkaizm5y;pl4( z.p- e ting force on this current?

  A charged particle moves and experiences no magnetic force. From this we cao12 u;p;yng jqn conclude t1 ;o p;jq2ynguhat

  A charged particle moves with a constant speed through a region where a uniformv- ses2ug /wa+ 7no.vj magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum w -+v7 nue vasswo.g2/jhen the particle moves

  A charged particle move:1 ikc*wymmtbv xud4vh. 0(. as across a constant magnetic field. The magnetic force on this particleamb0 (vc1*.khmu xd4t iw:vy.

  A charged particle is6/ywqy vm n;;v injected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weigh v6 qm;;ywny/vt, the particle will

  A charged particle is obser;eez(pri2i-q0eq o z2ved traveling in a circular path in a uniform magnetic field. If thz p22(-ior;ezeeqiq0e 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 circulsnz g.(ys(b -tar path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path wos-ybsn(. z (tguld have been

  At a particular instant, an electron moves eastward at s:he:ir6 hmmn6f)m t6ppeed V in a uniform magnetic field that is directed straight 6nthf r :e :mm6m)6hpidownward. The magnetic force that acts on it is

  An electron has an initial velocity tef 9c-4j 1(j(k/unjfwro8 e7n xqmqf4o the south but is observed to curve upward as the result ofjq- uf/(1 q4n4e 7ojwf x cmjf8nekr(9 a magnetic field. The direction of the magnetic field is

  An electron moving along the +x ax26lj*-eg po9)ky st qcis enters a region where there is a uniform magnetic field in the +6keyjlp9 og- 2qs*t)cy 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 sg38h0szl)zbg 5f*a7 zo ujia6 traight current-carrying wire is

  At double the distance from a long current-carrying wire, the strengthsfk 0l:+n/iod of the magnetic field produced by that wire decreases0+ /fd:o knils to

  Two long parallel wires placed side-by-side on a horizontal*2w9qwl1gbg:ok w m cev,0-9ddf(lt e table carry identical size currents in opposite directions. The w01wkew bde:(f,9q*gw olg t2mc9vl-d ire 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 placedry0,zq)o9 di1 ouh-wm 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 10h-,id owo9zyum rq)two wires

  Two long parallel wires carry equal currents. The magn+u -*)/c*c46 hzb hkzehzio flitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of o4)6lkcf- *hze ih/ z*z+cbuh the new force between the two wires?

  A long straight wire carries currmkpywzy8 geh7 ) 2s )cn8w4n2du*yx, zent toward the east. A proton moves toward the east alongside and just south of the wire. What is the direct42y,y*) kgz2 wpse )dzxmnwc7 nu8hy8ion of the force on the proton?

  A wire lying in the plane of the page carries a currentrjllsc(k -7t 8 toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly tow- j87s(klrtclard 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.7) ihar9xf12ibys 5 yi If the wires carry current in the s9byi)1fah7 i2i srx5 yame direction,

  Two long parallel wires are placed sq/l);idmm(h6o/hq5p oo p 1 qhide-by-side on a horizontal table. If the wimhh)ql/io hqo( 56qodm/pp; 1res carry current in opposite directions,

  Consider two current-4geu*uj 1vtr:xyk +5h hntc8+carrying 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 +u:urth4 cy5 *8vtg xk+nj he1of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both a+hw f 30k:fvcjre 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 tj :3 kfv0hw+fche smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs (-(zhxmea p *dwhen the angle between the loop's magnetic moment and the magnetic field vec px(me(dhza *-tor is

  When placed askew in a magnetic field, +6: k;- ssaxoj98dd, sjedxefa current carrying loop that is free to rotate in any dixkxd :sa+d,6je8fd;e 9 s-ojsrection will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essen)2 x 7-,ub0mcfcf cdiatially all electric motors?dca-ixc)7ff20 b u,m c

  A circular wire loop lies in a horizontal plane on a table and carriesca633x( 5e f*lvo c 7+fs vvinu81g1gwhsyue( current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the nort3*ueavoh1 y1 35 iwx 8fsgccnvf(7ev+6(lsguh 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 charge q is accelerated through3*erz2,kp*ebzw*6qpd(cfyk* 0gczd 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 z6 p2 *3*dqp0e z,*(erckyf*c gk wbzdparticle. 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 cross/4kdj:3j 8 ay 6ymu9laz+wjnsed 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 ausjkmw+:3j8 4/a 9znayy d6lj 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 6 k,;p jq;jxthof 0.60 A is oriented parallel to a uniform magnetic field of kp;;,hjjqt6x
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current /69 5z cwmt/bcvq;fcxof 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 carrying 5.0 A when it is placee.llxidsa0 36 d in a magnetic field oxlald6s 30ie. f 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 0.050 kg and is in a magne)mj/qofp *dy8tic field of 0.10 T. What minimum current in the rod is needed in order for the magne/o 8dj) *mqfyptic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the mv c8y+;4 4ud ra0th) ldid*hut)i*ackagnitude of the magnetic forcd4ak0 du;vtu)hia4h8+r*t c )c *yl die 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 witf(-mi .; -bp e7ezn v- i5x/tzw f2cftt,ty*jah 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 dz9t,s wjn;51et.hdg 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 due north with speetj pv-8xc4wbd13k+ olqtr6 h1-o h dd*d $4.0 \times 10^5 \; m/s$ 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 a v1sm9h6)nww 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 withif-: q5h k.uxw a speed 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 speed3wp qrk7hnfmtm+ ;flb6/ yvv4 c5/xa8 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 1 2*l)2 tb h csydizaezm+t54lwire carries a current of 25 A. What is the magnitude of the y zci2 h e l5za)mdtlb1st4*2+magnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the ground,t,7 ;j;cstlwa9.zg uq byzw/3r ; q*ka 10 m away y;wlcqtzu3/. *7;bja, ; rgkzs at9qw?

  How much current must flow for 1z94a sbbb4jp9(igio m+8oew$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a lonn; ixo2j6nq:ag straight wire 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 fojx:a26i n; nqield of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposye i 7xp+0k45 wdw.3sdy y8+3cijvd sjite directions. They are separated by 40 cm. What is the8 d3. iw +y 5dsk 3jy4yxse7c0jp+wvid 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 opposite directcxhvnng/1 y :mu81j0a 1hfe0pions. The wires are separated by 0.20 m. What is1gj hh1mv/ne cpax:0fy08n u 1 the magnetic field midway between the two wires?

  Two long parallel wires carry ) n(y rdtgfhz/1p jju,5*p1lci.ipw 1currents of 20 A and 5.0 A in opposite directions. The wires are separat /lnji,wd 1 piczft5p.y)u1 hrjp*g1(ed 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 direction3bf v)chaw zzy)j2:tn2z14u w. They are parallel to the z-axis, and they pass through the corners of a square of sid afy)uv213n )zwz t2 wc4:jzbhe 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 wiresb:9q +y.h,fb0rk6 i qz;sc pty-6pilo carry currents of 5.0 A and 8.0 A in the opposite direction. Th, 6y-o; bi qtif+ 0:y.czpl9rh6qb spke wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field ie 7o1lvf5a;s-+ dtdu at the center of a circular loop of wire of radius 4.+a 7- d;uselvt1ofid50 cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. (zkkq*mf3 jfwl b 6.v0What magnetic field is pqw3 .vbfk60fm k jzl*(roduced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 tujghdm5 ; c62igrns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic fieldjc6h25dgm g ;i will it have at its center?

  How much current must pass through a 400 tu -0:rbd4f5:joa qi/ wt(xogeurn coil 4.0 cm long to generate a 1.0-Tr 0daqooibexwf/g:t j(:5 4u- magnetic field at the center?

  How many turns should a 10-cm long solenoid haqxdno8zzxz0*h.yi7 27* sm*ddl k1 wbve 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 rectangulaud3;s be an gy/a./3.u/voedn r loop of 120 turns that carries 6.0 A if its dimensions aren de .a;3/d/gb/sun3aoyvu e. 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.,g d8 (mvcl:iaj).ngs 50 m is 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 perpendicular tod)a,cg s8.il(v:gjmn the magnetic field?

  A circular loop of wixz ilttkk+wz -:i1,k)0wl,vj5/ ihlrz: )awkre 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 kfzg5ex + gpsb+ ;47aqin a magnetic field of 3.5 T. The loop hasx+4fbz+7g 5pe k;sgaq 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 radiu t4iok /t1a3dls 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the 1t4a t/odkl3 imagnetic 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 mg5l 5sxzo-vpev(,5 z tn 8)jhnagnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic ton,s 5x8vejh n(o-tv 55l)z gzprque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of a* sv w9t1,jyx( -:jgs8ntmn rhs2 hpo0rea $0.25 \; m^{2}$ 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 (chahkdhy* gsf2q8 x6/rx)de3 mz5rge 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 velocity wz7w/hx.,lfl:9sk khcigv; 6 $6.9 \times 10^6 \; m/s$ 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 1/89thn6b x4t,ftq m en0 co+ep0wkkx 3.0 kV and then moves into a magnetic field of 0.040 T. What is the3bpmx9x centw 0,e t4/+6q k0ktonf8h radius of the proton's resulting orbit?

  A proton is accelerated fromo-jkqxlls f+ * uup0ea38fd /) rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of th8p) 03 / l-souekdxu+ffa *qjle path it follows.

  A beam of electrons is accelerat5 ew q47 z1ykk(7dpnjshorfyb/ 9d3ilu7 68cced through a potential difference of 10 kV before enteo9n 77rb/q cz wyhekfu8dk46 i7l (jps315ydcring 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 to be undeflected?