If the north poles of two bar magnets are bum o*5fs vkj++lra)( yrought close to each other, the magnetlf)uys +mk*(o5rj+a v s will

  If the south pole of one bar magnet is brought h4+ ve5*+irbfs:ykkj near the north pole of a second bar magnet, tki 5h4rks+fb:y+ej* vhe two magnets will

  If a bar magnet is divided dw,9 u.t8,ot 7nwvehfinto two equal pieces,

  The Earth's geographic North Pole is magnetic(+;jxg8c:olje.ply c5,vztrz1 )golally a

  The south pole of a magnet points toward the E y-tmsl2nws+wc/2d n6arth's

  An electric current producesa *c+x 0eqt:x hfah-,x

  Which of the following isd p2c1p c*smihcga90:fp i-*n correct?

  A vertical wire carries a current straight down. To the east of this wire, p ux.bvyi/2n7the m2/ .v7 byxnpuiagnetic field points

  A horizontal wire carries a current straight towxcga9 5p*n) rfu:kn;uard you. From your point of view, the magnetic field caused by )9a xn5g;runkcpu :*f this current

  A current carrying loop of wire lies m+ pfe j e+muc*so.+s:-qe 2odflat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction+m.jc eeef- 2*m osq+ops: +du 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 tab ,bo dhya9h2-hafr )xuj78x;ale top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is ther9oax72h8dufh x, ha; aj) yb- direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field llyjk+ y*r-qip /m6s1is the

  1 T is equivalent to;dv5o qoxg6m z2a7 ,vrg5/iqwgwl,q(gn yp -0

  The direction of the forcmuq ,dc )z.6pbe on a current-carrying wire in a magnetic field is described by wh)mb .uzqc6 ,pdich of the following?

  The force on a current-carryingpff bkx4p2(zxc:(rd. wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a ma*nc:f rq5iqvofh nl9 p+(/2qagnetic field is equal to zero when

  A vertical wire carries a current straight3*y()v g pgsu * tkqcv*m0zwz5 up in a region where the magnetic field vector points due north. W )5pzkycz*0 u s*gq*v3tgv w(mhat is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we cu d1ntqs5;tx (an concluddq;(1t u5 txnse that

  A charged particle moves with a 6u+l , st 4a(tc:npmiyconstant 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 be maximum when the particle mov:yu(tcp t4l 6am+ins,es

  A charged particle moves across a constant magnetic fie st ,2 q qlogr3o7q89npfbi+,hld. The magnetic force on this parti,i3+g 9p hrslof82ot7,qqbq ncle

  A charged particle is injected into a unifo-j uy.qg6hb 8hrm magnetic field such that its velocity vector is perpendicular to the magnetic field vec6h .uy8- hjqbgtor. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform magnet3h0ow +nw(wp*gkkg z+ic field. If the particle had been kg(3+nwkgw p ho0*zw +traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path hio7c, k8wf2bz 5 ux3uin a uniform magnetic field. If instead the particle carried a charge of +2e, the radius u5,fb x3o cw72kz 8hiuof the circular path would have been

  At a particular instant,7 c e29u 1nisvs9njyz; an electron moves eastward at speed V in a uniform magnetic field that is directed straight downwa9yzues s9jcni17n;v2rd. The magnetic force that acts on it is

  An electron has an initial ve , +52qmrcrahdlocity to the south but is observed to curve upward as the result of a magnetic field cqmr 52a,rhd+. The direction of the magnetic field is

  An electron moving along the +x axis ente-y ptz-i6hmw/rs 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 t/m iw6-hztp-y o right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying a;q 2 e:b*;k7xncskmiwire is

  At double the distance from a long current-carrying wire, the strength kp gxpeqrg /lo951xzxkx it z8 v.,429of the magnetic field produced by that wire decreases 4zvi qxlxgr,koz8/ xxp1 gk .t9e 2p95to

  Two long parallel wires placed side-by-sid.awtr w +-gq hga1*yk hh*a;9we on a horizontal table carry identical 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 view, the magnetic field at the point exactly mi- *wh1.9qk; aag+rwyh*htaw g dway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table cc zbyoo;0/n5p8l 1hhf7 3xsybarry identical current straight toward you. From your point of view, the magnetic field at the point5o0sx b3 fl7h;8zyn 1p/ohbyc exactly between the two wires

  Two long parallel wires carry equal currents. The magnitaqrmt5y i243ogge 5) vude of the force between the wires is F. The current in each wire is now dougmy)5v4t req i352oa gbled. What is the magnitude of the new force between the two wires?

  A long straight wire carriesgcs ftisp))92z u.l 2q current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of th )ifcstg.9 2quz)2p lse force on the proton?

  A wire lying in the plane of the page carries a current toward 9kigb)ql2pswx k4y f1. -bot +the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also ii.g ofwk +b-xq24y1tbp)ks9ln the plane of the page, from your right?

  Two long parallel wires are placed side-by60z(x xkia-ah2gu+kky3w l vwp644 a y-side on a horizontal table. If the wires carry current pwhw-ay (6y4+ i 2v0klz3kxu 4x6aakgin the same direction,

  Two long parallel wires arp du/6fs gavqds(/ 4s7yqhk50ct8b+o e placed side-by-side on a horizontal table. If the wires carry curren5vq/q 7f4u0a/odks gc(6+sst8 hybdpt in opposite directions,

  Consider two current-carrying circular loops. Both are made from one 0c1x mx0hy+ul strand of wire ah 1ml cuy0x0x+nd 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-car0t8 gymk ps(r2rying 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 moment of the smaller loop, the (s8r0y2 pgkm tmagnetic moment of the larger loop is

  The maximum torque on a current cai6xql9+n s 7na1 7izerh)qc:trrying loop occurs when the angle between the loop's magnetic moment and tt97 haq nxq+nl):1rc6 i7i ezshe magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop2s6xr7hf w0 ax that is free to rotat rx62h7sxfw0a e in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation oadjp(0(4is zoi pqqn2 + -n9uif essentially all electric motors?-pq9n4q2i(zsdiap 0u jn (io +

  A circular wire loop lies in a horizontal plane on a tabfcw01hij2xq 748ij srle and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's mqri720 fh41sc ijwx j8agnetic 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 part 4b5gf0d.orksr :mw *ticle 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 particle in twd5 *trs k0r: 4fom.gberms of B, q, V, and R.

  A velocity selector consists of a charged particle passing2vr- +grs) oell2meex7 -b:qo 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 a velocity selector, the particles move toward the east, and the magnetic field is directed to the north. What direc2el+ oe ol 7xev-b2mg rr-)s:qtion should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented para ob93cf7ler6q llel to a uniform magnetic fieq6feo l 9br7c3ld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 As+s) bmzh7q1s 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 t6p-f v r3u j8u9ugev;wire carrying 5.0 A when it is placed in a magnetiju6 upvv t- g8e3rfu;9c field 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 0.050 kg and is in a magnetic fie+xi0v;0h )0km ipx9nk,/czb)txjvn wld of 0.10 T. What minimum current in the rod is nej t9pvbmii) x,zxvh 00k +n)knx;0w/ceded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is ao0k: pxt 1u1ydjzm3+ in a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the proykatmx 03+1:1 ju pdozton?

  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 w4 h9-un 8phiua 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 f;f0pi* bc ms9a 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 spetxb*vi7g,j 3qed $4.0 \times 10^5 \; m/s$ 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 of7kh(xs9q s5kex e1 irjx-/lg0 $8.0 \times 10^6 \; m/s$ 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 fug8zqf95 j4yspeed 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 speedi eake.p*v.vl4;*l eb : ao0u,/cp1eb4k zvwc 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 currmhpu k5pzyo.a q3nd) q. +2gd:x5wq:went of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from dzwy:dw.qkuh5q oq 2x p m3+p) g.5n:athe wire?

  A high power line carryingvv(- oq,/xpip 1000 A generates what magnetic field at the ground, 10 m awa/p i-o(,vq vpxy?

  How much current must fz lne bn6y1a:itx(a37 low 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 isi;w-j q fd66zu the magni6 di 6uzj-q;fwtude of the 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 directionswt9 u4ag)ceg+ ky fv*r3dx,c a,: 6tpm. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point, ecwagrg*fdm vypx:9ka)t+ t,c34u6 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 directxb(-dzxrh -g6qwco. /ions. The wires arh -bxx .6/oqzdcwgr( -e separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions.t3o :xr7sf6 +2ndtlubw (c(mvd h/hi5 The wires are separated by 0.20 m. At what point be/26m3ntx :5(vltir(w+ 7uod bf h scdhtween the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in a8pqag -7f*kscp0s -vthe same direction. They are parallel to the z-axiask c- a70sp8fp-vg* qs, 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 currents ofolc,a2sq 6 j:p 5.0 A and 8.0 A in the opposite direction6j ,: 2clopasq. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular l 5f 4i8rylye 0ey0p,tboop of wire of radius 4.0 cm when a current of 2.0 A flows in the wirefyy4y0 r peb5,8el it0?

  A solenoid 20 cm long is wound with 5000 turns of wir xm(sgblb );0bvp +:1r* u y)/qh1mkec setwv,e. What magnetic field is produced at the center of the solenoid when a curtx)+;gm/1sl1u k b eh (vmbp vq* :)0sycbew,rrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long anqm-drek6 4r80stwro h/ e 41zud carries a current of 4.0 A. What strength of magnetic fiel h8q4szr-uw/ek1r t06domr4ed will it have at its center?

  How much current must 1c;a*cu;ynmu pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magneti1;u;nc*y cuma c field at the center?

  How many turns shoul( .modaw0s3 lta f2-bed a 10-cm long 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 moment of a rectangular loop of 120 turns that carries ml7:t c*xxgng(fr tpp0r*5v .6.0 A if its dimensions are 4.0 cm x 8.0r:fm5r0pvc7 tp*(x. l*gg x tn cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field o)(y0yka4oof;u v* tfc g65n +ekw4bkgf 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 gf4ftnkg)va;e(0k6 kyb+ocuo 4w*5y to the magnetic field?

  A circular loop of wire of cross-sectional areaf7uq/ d 7ux (msp+xixa*l1 llh*m d/g- $0.12 \; m^{2}$ 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 magnetic field of 3.5 T. T5r wp0pq) ,-oec 4p4dx xog2xohe loop has an w5q0 g c4xp-,p4eod )2oxxrop 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 un.if j4a6d cud a7z*w*riform 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 lozfui4d crwjda.6 *a*7 op is parallel to the magnetic field?

  A circular loop of wire of 7b r0jae37bln radius 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 mag7703b raelb jnnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area mvih -j ;l,n)x$0.25 \; m^{2}$ 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 (charge e) has a speed i0yidx(rawbbshb * ;t.* j 4gb;3qbr7of $1.0 \times 10^6 \; m/s$ 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 witholb jxd*7reouj5huwu8+17p * 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 through a potential of 1.0 kV and then moves into a ma 5m h0xf(khhy;gnetic fiel (kxm0h5yf;h hd of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It y1i va/oon: s-enters a magnetic field of 0.30 T oriented perpendicular to its1:/-vo ioay sn direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a pote2dn2- e kdyoc.s wbi9k)tdf(9kgf1 /b ntial 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 thei. wdf/dnye -os9g9bt)bkc2 12f d(kk particles are to be undeflected?