If the north poles of two bar magnets are brg+s)j3 k.ps-w,wv)co4( fok,f powy zought close to each other, the magnets jfw4 ook )-,w s y,c+f.ppg zok)(w3vswill

  If the south pole of one bar magnqppk1trm; pfti w76suo 7)) 6r2-avj zet is brought near the north pole of a second bar magnet, th 6vwzppimrp)sk-a 1f;oj2 qu )tr6t77e two magnets will

  If a bar magnet is divided into two 6xvoy(ok tx/a*ns9 9nequal pieces,

  The Earth's geographic Noin)m tstr1 x.p9d4wzj9cre+ :rth Pole is magnetically a

  The south pole of a magg27 w*w*ughower 3xs *net points toward the Earth's

  An electric current *ve b0n-cbzfd+;w b ud(:xz8b produces

  Which of the following is corrd- gfdiw9 sccxt.;97gect?

  A vertical wire carries a cur7uq7 lduomt)j fl */e*rent straight down. To the east of this wire, the magnetic field point*l *uj7qolu) 7/dmetf s

  A horizontal wire carries a current straight toward you. From your pois57 *chi8ikmyds i29mnt of view, the magnetic field caused icd2 mmii 5ys789 sk*hby this current

  A current carrying loop of wire lies fla6a5)thu-sqb bt on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direc sbu5 )tqh6ab-tion of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of t)*;oovnk7m 3dyh h/dy8fu 8n wire 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 current, inside the loop nd3o/od78vhm n;ht)kfy 8*yu? The magnetic field

  The SI unit of magnetic field nd gix+,g8k2cd .b6puis the

  1 T is equivalent to5h2 ik9mn q2oj

  The direction of the forc )5.aoc 9ya2hi,k xemle on a current-carrying wire in a magnetic field is described by which of the foll9a.l 5yxom,2h i)k aceowing?

  The force on a current-carrying wire in a magnetic field is the stronges*kd av* h0dhxbqk ue 7t7*nn:+t when

  The force on a current- jz8f38sm8*gec jdbt.fu 87an j54jpkcarrying wire in a magnetic field is equal to zero when

  A vertical wire carr*xrqik hsv ;0chc(3)c ies a current straight up in a region where the magnetic field vector points due north. What is the direction of tc(*s hhvkir0c) x3c;qhe resulting force on this current?

  A charged particle moves and experiences no magnetic force. Fromxy8+ oqv (6r72h8 b :xomvsg)(2spmqgrmxop4 this we can conclude that(pbso68xgm8x)qmg4orv2ysp +rh2x(o v 7:m q

  A charged particle moves with:h.r7eei+flhln 6yypsms 3-hr80d w9 a constant speed through a region where a uniform mag7sehhyel+fw6rd :-8 shp0i9mn y.3 r lnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnho*)cpatpt0iqf q*2 , etic force on this q*)phto,tafci0qp *2 particle

  A charged particle is injected in+cholruq ;gzp+p v l;1 4q:(edto a uniform magnetic field such that its velocity vector is perpendicular to the magneticl+qrzuq1:d l 4ocp+p; (;hge v field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a un)dmiko c3m fszxt8; 1*iform magnetic field. If the particle had been traveling twice as fast, the radfcs3k8;xzi 1t dm) *omius of the circular path would be

  A particle carrying a charge of +e tra-sxd97ojsf7 jygy 9 w eiq0uqnp8.;f3pon .4dvels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circ7ij yfn;d-.spy sq.e x 7n8 940fwuq9 jogod3pular path would have been

  At a particular instant, an .ae jz-.5m3a ua(n8x /lw;ctsg 1bngdw; gdu1electron moves eastward at speed V in a uniform magnetic 5tgxeu 8-nj d.1.aus(z nmldw3;1;b /aggc wa field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial veloc: fm xpyl29zg8ity to the south but is observed to curve upward as the result of a magnetic field. The dirm 8gpxzfl92y: ection of the magnetic field is

  An electron moving along the +x axis enters a region where there is a un-h08ing, u fdlu) 5msfn c1md*iform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to ri,m8i05 *-ucundg1mfs n h)ldfght, +y up, and +z out of the page.)

  The magnetic field produced by a long sf2rogg f fan+z8nw6(:traight current-carrying wire is

  At double the distance from a long currene7zn2avwzv z3j.ac ;,t-carrying wire, the strength of the magnetic field produce 2.janz,aw 7e;v3vzczd by that wire decreases to

  Two long parallel wires placed side-by-side on a hori/j-2jmb)up ik su67vb zontal 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)-ps b buvmji26ju/k7 midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carry identicdcp9. oi/yqey3t fq -4al current straight toward you. From your point of view, the magnetic fif.39pycqq-/oit4 d yeeld at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of dox;6 y 3lvy)g5jbmlzw9h*b9 the force between tho 9xd*h; z 53llj6vbyw 9yg)mbe wires is 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 carries current toward the east. A proto:g-8clkwo:0fypmv 3t n moves toward the east alongside a gy0lo::3cpk vm-fwt8nd just south 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 bot iq:an*kqc u.2nz*1bjd8h 8i gtom of the page. What is the direction of the magnetic force it produces on an electron that is moving per812*ni *.hcbgi :jkzq8nu q dapendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal t5ew+ax -nt.wg: 16vehkymht. able. If the wires carry cur:hv whw. t.g a-e1kx+n6e5 ymtrent in the same direction,

  Two long parallel wires are placed s.op o 9k.vkj/dq17 iupide-by-side on a horizontal table. If the wires carry current in oppos1 vpd.jup9ikoq7 ok/.ite directions,

  Consider two current-carrying circular loops. Both are mad9;y9 k5m g8vf8jj3dvmlu - vyle from one strand of wire and both carry the same current, but one has twice the radius of the other. Comparedv f9;mlkg8vy8jl-v9d3 yj5u m 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-carrying circular loops. Both ar rqqw2e( yd,o;e made from one strand of wire and both carry the same curre(y dq,; qrew2ont, 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 curi9v;uied wc*fts1: k)rent carrying loop occurs when the angle between the loop's magnetic moc9)dt1 uswike ;:*ivfment and the magnetic field vector is

  When placed askew in a magnetic field, a current c wsxg1 ljvm66vqh x66/arrying loop that is free to rotate in any direcx66m6 wh xsjvg1q/lv 6tion will experience a torque until its magnetic moment vector

  What fundamental fact underli9z-h) ( dtepgies the operation of essentially all electric motorsi-9 hptze)d g(?

  A circular wire loop lies in a horizontal plane on a tap:c0)o uyp;nkfn089xjq*v0 feye3 p pble and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points ;*eof 0ppy0k0pnu8qp ec)x9vnj3y: f 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 particle of mass m and charge q is acce9 xmtlteiq)fgk 9;w.3oz(e p0 8oer -alerated 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 terms z oxe)e .3(gowtq8 ik-99m e;lptfa0rof B, q, V, and R.

  A velocity selector consists of a charged particle passing tkjc17nt +.j kfhrough crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles kf c t+1jnk.7jof 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 direction should the electric field point?

  A 2.0-m wire carrying a current oe 48 q7mpo2 lxd5.nasnf 0.60 A is oriented parallel to a uniform magnetic field eonx5q 4smp. 7dn82al of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a di ze;y-jsxwm e gkrf ,rt98s u)(r,d;e5rection 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 nl(lzg:+2-ofjl 1ii2 n)fhxv meter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wirei22jl(fnfn xh1iz-: l lvg) o+ 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 isekt-: iib1; qn*of *ku in a magnetic field of 0.10 T. What minimum current in the rod is neededi1btk:f - ou*k;qnei* 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. (jgh9cs6f0:hsy7 xhnosf h: eu)a, j6What is the magnitude of 7jshah0s)6 esco6,f:9g xh: nuy hfj( 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 speedgr8x4wy* p b; :wbv.hi 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 gf,g4kf (u3+m -mqv vla 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 withoseeo k ytz37z o.:+8ku8t5c w 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 gmuvx5r5qv 1(:m e 2mh(nk ugz n71k8h1shy3vof $8.0 \times 10^6 \; m/s$ 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 ia-4n 1n)q63 rb omusaspeed 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 o;r m3+fk k9h1 y2d-ydukx.hsbf $3.0 \times 10^6 \; m/s$ 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. ,.uaoff h*s(f What is the magnitude of the magnetic field at a distance of 0.15 m from the wireuoa f.*sf,h(f?

  A high power line carrying 1000 A generates what magneticwf 2qb(wn *q1t field at the ground, 10q*f2( wq ntbw1 m away?

  How much current must flow vp/yxh9f-u *z 2h f urrcw-79zfor $1.0 \times 10^{-3} \; T$ 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 xs3 1z w2 zy/ ddnb/fr7qn*cm;the magnitude of the magnetic field due to the wire equal to the strength of tyws2ndb3*/czq 71mf rdz ; nx/he Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite direpg:w rggu9)lba/ 0-k xctions. They are separated by 40- b:9r0 pgggal/wkx)u cm. What is the 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 zc1e66mr xul1d9fy , aA and 5.0 A in opposite directions. The wires are separated by 0.20ryucdl66f 11 ,m9ax ez 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 directiodrxr+6/va5mx7nnir pp zqs7xr 2 : ;i1ns. The wires are separated by 0.20;/r: nivasr6d+71 pr7n2z xrxx iq mp5 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 0/* nsnfb0e v9zeu (tgdirection. 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 magnetic field does one of the wir * nbf00v9(/snezgtuees experience due to the other wires?

  Two long parallel wires carry curroz+cegg 8jx n0w3cnz y-;3ma ff+ak,5 ents 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 the two wire cjgz5;ck8 ga3n,x zfnf+ 0aw-om3y+es.

  What is the magnetic field -8o j+7a,wmqxh qit+cat the center of a circular loop of wire of radius 4.0 cm when a curre wth+ 7 caqixj,8+mqo-nt of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5x3m:ujwf 8s5 rh;i 2:g )aiwfd000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A fu 3d5wjh isi x;:r g8)m:waf2flows?

  A solenoid with 500 tg3qjwbevr *0mr- 5g9 tcdhi /-urns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at its b*jrg5hc/r-wie - v0m9 q3dgtcenter?

  How much current must pass through a 400 turn coqub l7;bpir+ *il 4.0 cm long to generate a 1.0-T magq*+r p ;bubil7netic field at the center?

  How many turns should a 10-cm long solenoid have ipq ;.f. 43rxr;x9 rp+:gyzn )qglgjerf 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*0vbk6+bz o*k:fg 8glpinja - hat carries 6.0 A if its dimensiogzki*v:+ -gb k0njoapf68l*b ns are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field opw;dbjt,y(,z jk 9ptw7 s+:0 cr1wprkf 0.30 T. The current in the loop is 2.0 A. What is (tj;w ,kpt ,d0r9w:zsrpc7wb+k ypj1the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional pnbs7 a*3zay2v1:i.e n(vbvz 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 magnetic field of 3.5 T. Tdvhzryc:- 9/m: uia:vhe loop has aa :-:9 d /hc:rivymvzun 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 magnetic field of 0.x :ce2.8kbrsj30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?8k. xjcr: seb2

  A circular loop of wire of radius 0.50 m is in a uniform magnetic f;us2 a xy9ju9fl6ls .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 parallel to the magnetic field9.f6ls; juu9f2alx sy?

  A circular wire loop of arew ;omt3+j 4ljka $0.25 \; m^{2}$ 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-chargedpk9r.k 7:t kpd 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 velocity 6l**r +h)rggcm mk qi;zxe-/o$6.9 \times 10^6 \; m/s$ 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 i wtox /4dlty0gg6t52k (hg4kpotential of 1.0 kV and then moves into a magnetic field of 0.045g gk2(xd4ttgilw64 t 0/hy ko0 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It en28; z p f8rw-fzd ,k2r;payxqoters a magnetic field of 0.30 T oriented perpendicular to its direction offxk; r fqapwy2 zzo2,rd;-88 p motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference obl m0j-x8u: h;k1 n:zzp+lbfxf 10 kV before entering a velocity selector. If the B-l: x lmnf-h10x:kzu;p bzb+8jfield 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?