If the north poles of two bar magnets are brought close *s-r1tgd vsu/ to each other, the magnets *svus rg dt-1/will

  If the south pole of one bar magnet is brougz2ci qmp-ft(s 0mi) m)ht near the north pole of a second bar magnet, the two magne q f)0 (mimp2isz-t)cmts will

  If a bar magnet is divi2lhom7lc :e0 j-; cjwjded into two equal pieces,

  The Earth's geographic No qrks afvz87m dk(6/k8rth Pole is magnetically a

  The south pole of a magnet points toward the Earthvu4z .ev) -aao's

  An electric current pj1bzl:+ipa tb6:7i:yc*; pcz7as enlroduces

  Which of the following is corrajg pt, 6l6mo7gg7h )64c coxnect?

  A vertical wire carries a current straight down. To the east)w. 4xprga0hb 3uykv hn3.*gq5e 7h jn of this wire, the magnetic fielwjvnhh4 ubq 03g5p).ar7 y.kh*n3x ged points

  A horizontal wire caocdf-pke:w * jv shg*lut(9c700( yjrrries a current straight toward you. From your point of view, the magt(0vgshj- (r0ecp7 f j*owk9ycd:l *unetic field caused by this current

  A current carrying loop of wire lies flatwyje:y an+gma)-j1 v; on a table top. When viewed from above, the current moves around the loop in a counterclowa;m)jney jg:1y+ a-vckwise 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 aj nvf+ez4jb 9xdnrb8;; 0u-wh4- hxyflat 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 current, inside the loop? The magnetic;nw+4-a yz40;-v d8bh9jhxnferbx j u field

  The SI unit of magneti rd t: ):a2cl4 q6ziax/8munqgc field is the

  1 T is equivalent to8divhpdu eyxu;( w4 pk; p- 1cgh89+km

  The direction of the force on a current-carrying wire in a magnetic r: w 5q2tnbxift7c *sfli5f5:field is described bilff:w q :5f s2nti55 c*rx7bty which of the following?

  The force on a current-carrying wire iit f93p8sdu).+2ni htrm*;kqj qq5 bgn a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero whjl:9zuccio:2 t-0qa i en

  A vertical wire carries a current straight up in a region where the magnetic fiu t:r.jtf88x pzaal 4+eld vector points due north. What is the direction of the resulting forc zl8a a4:rt j8u+.ptfxe on this current?

  A charged particle moves and experiences no magnetic force. From this o3 (jolu) so9swe can co9lj() s3oo suonclude that

  A charged particle moves with a constant speed through a region where a v;x x3n f1cktd4cbq01uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the partib1q ; xnkx4d0cv1tf3ccle moves

  A charged particle moves across a constant md+h ak1rdg *7pagnetic field. The magnetic force on ag ph*1r+dd7kthis particle

  A charged particle is injected into a uniforn* n rv270b w9ab0 cpd3tsn)+pbzxny3 hnp.2nm magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particlent + 0 na2drp 37 p)w23 x9.ynn*vb0bnhczbpsn will

  A charged particle is observed travelinqasg9bgmw h)e: 20u x0g in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radih0b9ugq:m wes)2ax0g us of the circular path would be

  A particle carrying a charge of /y8:bwekh .sw +e travels in a circular path in a uniform magnetic field. If instead the particle carried a c8bwhk: se w./yharge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in :dv /d 7f mg/oere0 s)t1t.dqga uniform magnetic field that is directed s/ov. fm1ed7re qt)d/ d:g t0gstraight downward. The magnetic force that acts on it is

  An electron has an initiatf4y ) yicp,q gub);ad8 7us.ol velocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the,)7ascu oy4gpiqubt 8. ; fdy) magnetic field is

  An electron moving along the +x axis enters a region where therktzqv.)v;n8o e is a uniform magnetzvnv q ;tk.)8oic 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 current-carryi1:mb*j1g7yrxsw h la -pjti20oux9r6ng wire is

  At double the distance forbizs+g4sdrx)0vs+b : od18rom a long current-carrying wire, the strength of the ma od+:r b+dzbio1s8gsv4 srx0)gnetic field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry identic-kn r cs-*ipc-na kuf c4;;i snts.q)2al size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries curs-*kpqfscia-4 kit2)s. nrcn c- u;;nrent 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 horizontal tablb/.3dlp9o ,klfjv(lvu+m f;w e carry identical current straight toward you. From your point of view, the md fkpwj f+ll(3m;b,ov/v.9lu agnetic field at the point exactly between the two wires

  Two long parallel wires carr: z7zgctp x/w7r imm)r(3 tu1iy equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between th z)mt/g: 3i71txzwc ( rumip7re two wires?

  A long straight wire carriex)lh5 )n8sjgjs current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the fg jj)xns)h l85orce on the proton?

  A wire lying in the placdyf29p)y;qbc82da2) u9ufkk1ff z j ne of the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendiculaq2 c)1uyf8ubkazd j;9d9 f )2ypk2ffcrly toward the wire, also in the plane of the page, from your right?

  Two long parallel wig h4vx.cv r oko+px(ta+tw-/9res are placed side-by-side on a horizontal table. If the wires catw.p t/r-(+4 khox+ v gx9ocvarry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If thi8)1z89fl + xx)x uhvtl*q zdte wires carry current ilx9hx+81t quzd i)x) v8tl fz*n opposite directions,

  Consider two current-carrying circular loops. Both are made from one 1hf xpy j2.5e* z97 ipq)jwmuwstrand 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 of the smaller loop, the magnetic fiel72f1h*wz ym)pjx9q5 ewpuij.d at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from om m,+j-ac6u lal m*3fone strand of wire and both carry the same current,lju3 lf com6am+*a-m, but one 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 loop occurbvxf)qrvnb,x c;c n1wn-h)1 v(v0o/s s when the angle between the loop's magnetic moment and the magneticc0 n/obsx)1 r)v q,hx-ncvnwv(fvb 1; field vector is

  When placed askew in a magneti( t(rzt.dw 6ozc field, a current carrying loop that is free to rotate i tz6rt(. dwzo(n any direction will experience a torque until its magnetic moment vector

  What fundamental fact undeqa/kzu89eee : rlies the operation of essentially all electric motors?8:ezau ekq /9e

  A circular wire loop lies in a horizontal pl/ i8.7gzhz7 8kulchum8ibg- xane 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 toiu kg7z.b- g78mixclhuzh/ 88 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+h4m*u3i wx cd150ap vnyy *uq 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 th m3*ch 1pa+qi5*vw4udu0yn yxe particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through cr.zknpb)l6c9p1 a ojr 6ossed 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 dirbar6jn)6c.z 9o p plk1ected 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 to a uniform eldsa jp-.o2: magnetsp:j o2-ad.l eic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a cur+hp9, ocgo;0azrhp-sksp v* :rent 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 e)(+-iz7jop em2uyx jon a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wijpxe iyuj)m2 ez-o(+7re 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 magnok(qe t s,bp byr5i,(7etic field of 0.10 T. What minimum current in the rod is needed in order forsrboi 5ype7(q,kt,b ( the magnetic force to cancel the weight of the rod?

  A stationary proton is ird/rheys pf4 *df6f) 6n a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic ff)6ypf6/*rrse 4 dhdforce 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 zwgx3c x1u0-oof $5.0 \times 10^4 \; m/s$ 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 ai- lo;7:)k4q1 zr lkwwl rx+lv 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 h pitq6ob9)hdv 895dy due 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 speed oo5so9 ed 9s.dz1ee gk1f $8.0 \times 10^6 \; m/s$ 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 vx2tr:36ry ,n,wjfp rk4el q2a 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 speed *km yav+wkv d/r ,otp02k f0p*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 is theul n+r)t * regkmfio2 (effw1a1nr0.kx72 9md magnitude of the magnetic field at a distn97)kdx tieer f*u2w + 0an2.rgko1lmm f rf(1ance of 0.15 m from the wire?

  A high power line carrying 1000 f,xlza : m,iw1A generates what magnetic field at the ground, 10 m f ,xa,iw1m: zlaway?

  How much current must flowmb d2r8rzkl.u 5 uq13s 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 wi8qgicum)- q c(/ g5u8r4r xqexre carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength)q5c 4 88xu/rg gu qi(eqrcx-m 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 directions. They arw .vsuhi uk4;e 8 aqlu xbs6v5c.4cu* (kux.l3e separated by 40 cm. What is the magnetic field in the plane of telawsbuqs 5(lukx ;8c6vuikv u.*4x4u. h c3.he wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of w 0g(dm9f ppz.20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midg(mz 0.fpp9d wway between the two wires?

  Two long parallel wires)hcrsg0 +m 0em carry 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 contri)0cs0 mhrme+gbutions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same directux7; vb rinucjv+g(w (,(k( poion. They 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 ma( in pgv(j (vcu+ (rbw,uxok;7gnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry curkbjjokh:p67. 6xyq0 m rents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Fij0ykp6 k 7m.b:x6ohjq nd the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of radius 4.l m/):tsqp7qx2f eda) 0 cm when a curred)qsl pqmx 7fat)e:2/nt of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns 6-gs0xyb-g we of wire. What magnetic field is produced at xbw-y6e0 sg g-the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a curr z;-fzz/ ni0xcent of 4.0 A. What strength of magnetic field wil/xzz0z ni;-c fl it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to gen ;pd*dp ;tdii :d.;hez6o,g(b akfui- erate a 1.0-T magnetic field at the centert(a;i h6pdd,zd.: - odi*egbiu;k f;p?

  How many turns should a 10-cm long solenoid have if it is to.1i ksu+csn.m9 .gyqh 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 v-xu /vl-erk2turns that carries 6.0 A if its dimensi2e/kurx- v v-lons are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unifor*q-m/6soalb6fl xqc 4m 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 to thlxmqobl*/a6s6c4 q-f e magnetic field?

  A circular loop of wire of cr2sqnell):eaui1 mdzk s)/0y 4oss-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 magnetpis-+bf s(;za s 53ikwic field of 3.5 T. The loop has psfwb; 3 ks5(i+zi s-aan 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 uniformb9 d6a* 7l ,sosgkzxp65(yug j magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the pla 6a gg,dyz(*s76lukj b9sx5pone of the loop is parallel to the magnetic field?

  A circular loop of wire 9m,udt wz;z *18u mdhqof 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 magnetic torque when the plane ofmq1z9d zt*m;uwu h8,d the loop is parallel to the magnetic field?

  A circular wire loop of armisp-;.m3eu) vh g vb1ea $0.25 \; m^{2}$ 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 si e 3gc.x6a ubvx.e7+npeed 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 veloci6n/ o6o+ abodbty $6.9 \times 10^6 \; m/s$ 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 pottz1:ehsx * lf j04wy sz*z. 2tw5es8cqential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton5t* c41s2 : yzf. jlhtswxzswez8e *0q's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetindsf d):y*0pyc field of 0.30 T oriented perpendicular to its yd* p0f:synd)direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated 7blmu q lcvhx1bx5:;msu7 ta 0m3 +5pithrough a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector hax+s; 1hxu505mmb77bqlmltc3pv :u ias a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?