If the north poles of two bar magnets are brou1;y q6zlm.cro ght close to each other, the magne1cmq; y6lo.r zts will

  If the south pole of one bara ( 0xfrz(ffyv -zd79r magnet is brought near the north pole of a second bar magnet, the two magd-(r fyz7 f9vrz (f0axnets will

  If a bar magnet is divided into two erk,3ehhkv-u or x(5oni8s;w9e( y s6mqual pieces,

  The Earth's geographic North Pole is magneticap)vb w f32axmxn u44a6lly a

  The south pole of a my/i+: 19/ss4ifmdmxv ;m aub qagnet points toward the Earth's

  An electric current produccf7; ezg* gkz ;x2s9caes

  Which of the following isi/ wso*iqu2g9k1wh) n:st 7hc correct?

  A vertical wire carries a curreu22 d/i:pew, *ako stw: bsyh0nt straight down. To the east of this wire, the magnw ak b,:0st2:/wihed2y uo*ps etic field points

  A horizontal wire carries a c9xxorjpzwjo--n b9zo ped(sazo8 7/tr 477k 9 urrent straight toward you. From your point of view, the magnetic field cau wz-- zo99ps 7/xr k9a7otjbzr74xe8 o jdnop(sed by this current

  A current carrying loop of wire lies flat on a table top. When viewed from abon- w 9r2k7gvxive, the current moves around the loop in a counterclockwise sense. What is the direction of the magnekvi9n w2r-g7xtic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. ; )ui7x8 k1ztku 5iroc When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetioi7u5ik tr) uxc8z;k 1c field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fieldcvdkq adh7)v*, q-2 rxbj8br d.el)d) is the

  1 T is equivalent toy4t 7yf0 afqy5m nur9vl,1e8u

  The direction of thes v 4yo+vj 0*)shemq)jsb8a +b force on a current-carrying wire in a magnetic field is describedyj0sbehqs ojv)m)*b 4+sv+a 8 by which of the following?

  The force on a current-carrying wire in a magne -fyc ;,sq.jlvtic field is the strongest when

  The force on a current-carrying wire in a magnets m/l)f7jawi z5v x3,sic field is equal to zero when

  A vertical wire carries a current straight up i/a4 1stvhby:yk1 gug ph9b;*r j6myo.n a region where the magnetic field vector points due north. What is the direct *1ohjm: 4s6k1y/gvty ;bhp r9 ybau.gion of the resulting force on this current?

  A charged particle movetm cvr+g f u+c;f6qv:4s and experiences no magnetic force. From this we can conclftvucq+cvg;f64+ mr: ude that

  A charged particle moves with a constant speetuhds6 c09tc( 2ftri/d 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 w 2ftcu(i crhst /609dthen the particle moves

  A charged particle moves acros45;k;b n labeefq;pn+ s a constant magnetic field. The magnetic force on tha+n4pbfne;; 5 k;blqeis particle

  A charged particle is injt6d6f5r*0hcx rt3 jfb ected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, th jfdx3*r56 0t6rcbht fe particle will

  A charged particle is observed traveling in a cirs l):kkdj2 26jwkwzf3cular path in a uniform magnetic field. If the particle had been traveling l6j 3wk22)zkksjf wd: twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform ;q sa)h -mrs;4yjmw*emagnetic field. If instead the particle e s4wqmsj*h-);;r yamcarried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at1scoe: +toc;ic z yc5afal;68 speed V in a uniform magnetic field iz:oaasf5 cc; 8cto+ 16c;yelthat is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the h1pgh5 gw, +u usej,-.txzn.80r qgorsouth but is observed to curve upward as the result o.r ts.ngru5e0x,g +p-o ,hqwg8 z1ujhf a magnetic field. The direction of the magnetic field is

  An electron moving aldjm 8y(9wg9,4p msu*b vqyvt6ong the +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force(v, ydu p9 g4 69mmwvbqs8j*ty on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying wire pjv(e*+,k j5w linfr8 is

  At double the distance from a long curl q)sxxko6g yg3t.fi+ 9,d*- :zdokx rrent-carrying wire, the strength of the magnetic field produced by thx.-xyt,3r6kld+ifksdq z 9g:o x) g*o at wire decreases to

  Two long parallel wires placed side-by-sidje,a e60p,a/ qg2( va yui8c.o,tyr kde on a horizontal table carry identical size currents in opposite directions. The wire on your 8ti ,au, 6eog v0prq/y, da.k(a2ycje 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 placed side-by-xg q9usd r o/qjws4).2side on a horizontal table carry identical current straight toward you. From your point of view, the mag) 4xoj q qdrwgs.s9/2unetic field at the point exactly between the two wires

  Two long parallel wires c 9b7(ea wdlfm2arry equal currents. The magnitude of the force between the wires is F. The current in each wire is n2fe9 ab dl7mw(ow doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton m, ,fzzuq* n(rkoves toward the east alongside and just south of the zf (* ,zrkuq,nwire. What is the direction of the force on the proton?

  A wire lying in the plane of the page c,vhphxrjoz t g1 a)u3l+q(kdk / -rhcb( 5;w8garries a current toward the bottom of the page. What is the direction of the magnetic force it produoklr3vg; h rdw g,)1h/q 85j(+ (cbk-ahxuzptces on an electron that is moving perpendicularly 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 table. If,)1 yoyr6ijto 7hic :y the wires carry current in the same directi )ic t1hoy yj6ir,:7oyon,

  Two long parallel wires 0 fkgf,zv k; tog)js5t*vn2o+are placed side-by-side on a horizontal table. If the wires can o st5tf+)kk0gv ,fzv* ;g2jorry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strand ldg+g n6l;2vevolgsq9/ 4,am of wire and both carry the same current, bug v nl;ldmv2q6og e,/4s9 agl+t 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-carrying circuuk2j89 vl(i( 1ve;xw r1guc wclar loops. Both are made from one strand of wire and both carry the same current, but one h(1 2c jxrvk8 vwc1 gl9(wu;eiuas 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 occurs when the angle between the eog-y*l r5 g9dxq.c w/p8jc. zloop's magnetic moment and the magn-9cjq r8gy*5gw.l pod ce.xz/etic field vector is

  When placed askew in al2bz1r (cuoxapx;5j/ m9jjw* magnetic field, a current carrying loop that is free to ro/ r(lo;xj9 51bjcxujz* m2w patate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the op+9m bpa4irm zq t3t)d2eration of essentially all electric motors?+zm9d)ttabp32mi rq 4

  A circular wire loop lies in a horizontal plane dme zn0x2) lc9on 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 torque caused by the currents inte29)nzx 0 eldcmraction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated throughsc1svjy1x f- j s ,oist+2(t0n a potential difference V and allowed to enter a magnetic field B, wheres+t1t 2i1,j nxf0-vocss(ys j 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 consists of a charged partix( ;teshjzh1n+9 twa ff i .w8gq7;fe2cle passing through crossed electric and magnetic fields. The forces exerted by these fields ars ft;jhgq 8e2;ze f( ani7.+txhw 9fw1e 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 direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parall4zu:x3al kv2kel to a uniform magnetic field ok va 2ulk3zx:4f
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10dq,la+ jw)7c o 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.k 4x 8e1xv4ae*kbg*wtxv 2mk40 A when it is placed in a magnetic field of 0.020 T? The wirex*xb14xt4 *kmva k4e vkg8ew 2 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 magnetqohfi1 s 3jkqk/ 5evn;di6h,1ic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic forcqih e,1hfon5vks dkj;qi3/6 1e to cancel the weight of the rod?

  A stationary proton is in a up7k6*kq ;mh18n ,gwgt)wxvfr niform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the proton wt6hnk*gf x1 pmv7w)rqg8k,;?

  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 ofj*1fzdbe* j* xpx8x ppzw (v6y8gjw.+ $5.0 \times 10^4 \; m/s$ 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 speed of e99oygv * oft+$5.0 \times 10^7 \; m/s$ 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 sp 8bqwybhpcjd0ib7- ua- mx00 y mgk07-eed $4.0 \times 10^5 \; m/s$ 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 with0at48 dde iq9v 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 magnetic force of the electron.

  An electron moves with a sp5b(n9 ,a s(gdfp:jonceed 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 of ch 3r;)o8aca rl,c a7zl ;4bfo$3.0 \times 10^6 \; m/s$ 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 d q ; pjc6yw8uk093xb08fxuublga h 2:A. What is the magnitude of the magnetic f f gb0 x926h3juw;pdqb8xl08c:uyu k aield at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetf j6g*u;,gwzf s1ucfr ox0/;g ic field at the ground, 10 m sfjf, w;gug61ozr0f;u *xgc /away?

  How much current must flotiw2 fk2.seg tp+7e6vf z(b v;w 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 is t,slwq2de m(47g yx9qbhe magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic 9bm 4dqq(,we2gsl7yx field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currentdy6ggy1oo--;hfuvlh 24l /jy s of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one wire and 60 cmv4o;d u6jyf ly-lyg2h/o1 h-g from the other?

  Two long parallel wires carry currents of 20 bbiv6hz5+lv86 wlu+ (lp la3k A and 5.0 A in opposite directions. The wires are separatka(z5lbvll pvb6h6uiw l+8+3 ed 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 8 :qid6zgve5:7+yw5boreps m opposite directions. The wires are separated by 0.20 m. At what mq8w5e:g6dpzo rsv5e 7i+:yb 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 direcwo rxvaf6v -u//f -o*c.siitb 11 +ukhtion. 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+vxi o*f1crovw .ia/1 k/tufhu -- 6bs of the wires experience due to the other wires?

  Two long parallel wires c-+ (khetcg qpl+m/ b7h0o1e+ghox3 fzarry currents 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 gteeq0h+cg-m z31hpo+k7+ fo/(hbxlunit length between the two wires.

  What is the magnetic field at the cente js;q+0keds4 xfju.) er of a circular loop of wire of radius 4.0 cmd4x 0j)u+sfjk s. e;eq when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. m*9 lquy/4dktq :d.wi wgr 3u+.ewyd+What magnetic field is produced at the cente 9 l+ mw+ywdk3:d*ery/gtuq .w. qdi4ur of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is lhvzlijm-t sm k)05u/fx7 )x5 drie2*0.10 m long and carries a current of 4.0 A. What strength of magnetl f70em2/i-xmx)k rzuhsj5t5*dvil )ic field will it have at its center?

  How much current must pass through a 400 ( /d1c- e0zlh9i ;g2vkgylxg yturn coil 4.0 cm long to generate a 1.0-T magnetic field at the cenyvxl ;0zek 9y cdg/(gi gl1-h2ter?

  How many turns should a 10-cm long solenoid have if it is to ge86: qc9* wyt*pk y ym0zjog21jqqemv,nerate 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 turetqm* ac q+pdlxy ,.4+ns that carries 6.0 A if its dmqa ,e*+ .xcydql +t4pimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30riz qvtbgi)3o3ko9,0 T. The current in the loop is 2.0 A. What is the magnetic torq v),bozt0gii9 oq3rk3 ue when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-seq.4oekpi789f o*br nd0/ymx jctional 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. ss bupibe7)8(xf2v7 o The loop has an area of ub7 8iesfb)pvs(xo2 7 $0.12 \; m^{2}$ 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 inmltaq0 t* /c6n 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 parallel to* n t0/6amcqtl the magnetic field?

  A circular loop of wire of radius 0.50 mgmz,p/6wssv b z,3-m5lvmfz + is in a uniform magnetic field of 0.30 T. ,+,z pm5zl /b m3zgv6m-w ssfvThe 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?

  A circular wire loop of area t +ji ej6 4-fem5u+qwx$0.25 \; m^{2}$ 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 speenvteta/ce+2w )b w:3ud 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 velock3-u59ty7 w exh 4iyobity $6.9 \times 10^6 \; m/s$ 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 potu:,ne1 pa/f v2:t3aj z /eutl( dz al5f(euej4ential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the prot:pe4u2vz t/eeut/ja,fn llauje5z( d 3(1 a f:on's resulting orbit?

  A proton is accelerated from rest through 500 V. It ennugdhi 6n40- tew- 6xlters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of tg4-0 in-h 6en6xldwu the path it follows.

  A beam of electrons is accelerated through arv68o:bj z ii: sg.r9x 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 value of the E-field is required if the particles are to be undefleirzor:98 vi6gx .j:bs cted?