If the north poles of two bar magnets are pe)yf11 .mpk pbrought close to each other, the magnets wf.k1m1y pp)p eill

  If the south pole of one bar magnet is brought near the north pole of a seco:re wi-byx1 s3nd bar magnet, the two magnets wil3es- xi 1rb:ywl

  If a bar magnet is divided into two equa cf 1h9:h9lm6co2xmowl pieces,

  The Earth's geographic North Pol a anw+d d i0t9 vyg0(3kbdryxd ,;uytm,j)c-(e is magnetically a

  The south pole of a magnet points towr;/x,*bch wvw-j;a rrard the Earth's

  An electric current poq2e ;mjpw3qqz a+ nxvp;c):0roduces

  Which of the followivuz 38(i 002pzdj )ps5dlkj/ dsam0pe ng is correct?

  A vertical wire carrl+0q 2d3s ujz3xke 1ruies a current straight down. To the east of this wire, the magnl d 0r3jqe2z+1uxsk u3etic field points

  A horizontal wire carries a current straight toward you. From your point of oe3.3 a tt gd8k/dt kyf, /enqjjt,6l(view, the majjtoe(k,,tea/t y df d6g8 . 3tnlq3/kgnetic field caused by this current

  A current carrying loop of wirq56jmdfi( *adp6 zbci3y7n ; o0uru 0ce 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, outside the ;uu 67yc(ci05q d zn6ao*bp mir0f3djloop? The magnetic field

  A current carrying circular loop of wire l1iuw3t4ke i y-ies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwi3w-i tui ek4y1se sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field isnv-,y:n:,bd2 rstlbrn; p -fp the

  1 T is equivalent to4hwb anu 3kp/1

  The direction of the force on a current-carrying wire x89,ld t+h9of9kht3am , 9wu5x bcekt)4qve xin a magnetic field is described by which of the lm,xa99b)9t5o hx+4e3th k,8vw k9equxfdt cfollowing?

  The force on a current-carrying wire in a magnetic field is the sku4rq3 vuog 96trongest when

  The force on a current-carrying wire in a magnetic field is equal to 6 ylfxd qv-54ud+hyq8zero when

  A vertical wire carries a current straight up in a region where the magnets;0+waimxi 1 **bn/nkt* g hpsic field vector points due north. Whawpisbn*st g*+hn 1m;*0ix / kat is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we ca e 1vct8wmm.8ampt j0mx7i; :fn conclude mfav;81p 8m 7i0 cxe:mwt.mtjthat

  A charged particle moves with a pgn;8dfpbi2+ y)ti1ski. j7p constant 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 w7gp)2fy8tj1 in+k sdp ip.;ib hen the particle moves

  A charged particle moves across a f2zkv-j2m4wc constant magnetic field. The magnetic force on tk-m4 v j2w2zcfhis particle

  A charged particle is injected in)b*ec a ydu/28um f)pef *btx(to a uniform magnetic field such that its velocity vector is perpendicular to the mftbd)em p2ux ec)f * (u8b*ay/agnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed trgb6u* m/ps,n* ,jz bksyhm;23gr -ybuaveling in a circular path in a uniform magnetic fz,/yyu,j*rmk*6mbh3 ;bs bnsu-g g2 pield. If the 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 circular path in a uniform magne5sa9o ,t+ lp9gq,c cm5uqn j*ltic field. If instead the particle carried a charge of +2e, the radius of the circular path would have beenclt squg ,a,c 9jpq5+*m l59on

  At a particular instant, an electron moves eastward at speed V in a unifox95gk dvzxq4 im9 u25d5p t1yerm magnetic field that is directed straigh5mugt 19z5k2d9dy pvq 4xie 5xt downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but ischwke7j; i0q j)hdm/d s:,kr4e 5d6 hh observed to curve upward as the result of a magnetic fejhe 5d0qd hkk6ij) ,4m;h r7/:cdsh wield. The direction of the magnetic field is

  An electron moving along the +x axis entersa8ef (1j. wnbtdvyb pco4+65p 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 to right, +y up, and +z out of the pb+epj p4wn vcyd. t1o fa(58b6age.)

  The magnetic field produced by a long straight current-carrying z7y (n(pyr3opwire is

  At double the distance from a long currsnh,39buzhg0l rf (-went-carrying wire, the strength of the magnetic field produced by that wire decreases tol-r,gsb0hn3u 9 f (whz

  Two long parallel wires placed side-by-side on a horizontal table cgk(er,91. rm5 oxl:: 9*rohrcfsgum:pb s* ysarry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire onr l rxgh::s *1.o , rygc5:prfsm9ou* meks(9b 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 pliz 45ruefe-8jof3. t oaced side-by-side on a horizontal table carry identical current straight toward you. From y-ote845jf ei ozu3f. rour point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of thek)c)gv 2e( u g,sae8gq,xfc*x force between the wires is F. The current in e2g,,a8)vxge)(*k fq cgus xecach wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current5l.qomx-;ky d toward the east. A proton moves toward the east alongside and just south of the wire. What is the d;-5 x mqol.kydirection of the force on the proton?

  A wire lying in the plane of the page carries a current toward tzq:2i; -idmsc v n6;-ht2cijkhe bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularlyi2:k-hcnvjms ;d- ictz62qi; toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a hgz:5ln bx,ne1orizontal table. If the w n,x 5g:lezbn1ires carry current in the same direction,

  Two long parallel wiresj5dvg 3fcd. 9xrzv6 bw,dj 7(y are placed side-by-side on a horizontal table. If the wires carry current iw59v3x7( ydjgbd j c.z 6dv,frn opposite directions,

  Consider two current-carrying circular loops. Both are made from one sq-. k, ze f w0)upo:ywrf7vy6ntrand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnew n)zfw.eq f:uk,yyvpo07r -6tic 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 are made chjvb/x xp-i3tr :s-otl23z1 from one strand of wire and both carry the same current, but one has twice the radius of the other. 3vcr3l/thxx:1-s2ib-jpt o zCompared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying looifl*m26ll ;iu p occurs when the angle between the loop's magnetic moment and thi*milu l6l ;2fe magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is frj2xi;ey42kk uee to rotate in any direction will experience a torque until its magnetic moment v kke ;ju2x4y2iector

  What fundamental factniaslvo i9 +(b23dxxq uq-g/9 underlies the operation of essentially all electric motorsb3 v9(iiqgu2+qn s x/9-olad x?

  A circular wire loop lies in a horizontal plane on a table anq;i .3km4)iu7 ujlq/uey 1oead 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 theiq4a/3ui; eu uo 7mq.jky1e)l table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectromete gn-6 zu(ttb*zr a particle 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 terms of B, q*n(g6 -zbt tuz, V, and R.

  A velocity selector consists of a charged part:*;jfwgmyoc,as + 3m l5-stjgicle passing 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 tytlfc;ms5s3ma-w+og:, j *gjhe magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a cc /,7gbnh ef-7w q9w)d uzj 5yeks,0oburrent of 0.60 A is oriented parallel to a uniform magnetic gw bbe/wsf9n-o,kuzhj7d) c0 75,e yqfield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 dr0*6k6rs puqA 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 / 18etbf lwog3t3+6lm4 k ybj/uea2x ka straight wire carrying 5.0 A when it is placed in a magnl1e3/o2 f+ t yt3lgw4je/bm86xkua kbetic 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 m7 v6s:i g b.qgxy4 evdee+mw)9ass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight ofeq97 dvx.vyme : gis6w+e4g )b the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is thff9*.3v5x)p1pq u zkuex( qbre magnitude of the magnetic force on the prozeqru)(kf x53xuf*1.p9 p vqb ton?

  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 sp .tf nrlemlh03+aut 84eed 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 an -ec3zkb p)y5 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 spehrzri58lulihp 4n2s2f; 1yoy 0g 33koed $4.0 \times 10^5 \; m/s$ 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 of2-xbxz5 *nv8baamkb5 $8.0 \times 10^6 \; m/s$ 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 o3ml; owb7cj83zbs+ vsh1( me :2io kxa 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 ufsbjyo c ; ,pp1dhl32c xp-/5of $3.0 \times 10^6 \; m/s$ 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 straight1r x bli,cs xwy-s087w wire carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m fromw0ws xl,-1 x rcyb8si7 the wire?

  A high power line carrying 1000 A generates what magnetic8jm io;w t8.gl h6kyi8 field at the ground, 10 m ah mw8ig l6 y8tjiok8.;way?

  How much current must flow fo6 jgu1frerl;:ja 50ymr $1.0 \times 10^{-3} \; T$ 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 va/brf 4. ep9pthe magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic fieldr ape /f9v.bp4 of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite direcd;kq2t m;a-1t)uwhiiv 5 i(ipt n n69itions. 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 andqn;tmuv-;kd5a i ptniii96 h t2 (1wi) 60 cm from the other?

  Two long parallel wires ;x2l;hl -4a u*zjvc6cbo a;zx+i n0am carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betweenacxz* vl+cm 46a0x 2nza ;hj;;lb- oiu the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directiomjh(8zegue2fb41h. l atr ze:k /j)6 vns. The wires are separa8er6ja1 4kzlz e)t/jgf. m2hbh(vu:eted 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 direction. T jsq+3ii) u72afs:skk hey are parallel to the z-axis, and they pass through t3jkif)7si+k: 2uq sashe 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 of 5.0 A and 8.0 A in the ,hdxe0pbab2 2.j(z cu opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit lenpxjzh ( u2daeb c,b02.gth between the two wires.

  What is the magnetic field ax4(,hbhb 4g jzzqg.n) t the center of a circular loop of wire of radius 4.0 cm when a current ofxzjzg)qbb4g4hn ,.( h 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fielq -eh5 g; aouc3v.d2p:ohh-x-undn2t (ac 2ard is produced at the center of the solenoid when a cag2no-5 orh : u-end.a hv2chua-(qx2;tdcp 3urrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a 40)ytau k p,jis ve l,) )cmi0m(2cjincurrent of 4.0 A. What strength of magnetic field will it have at its centecu,s)ea y)0)m 42cikvptinmjil (0 j,r?

  How much current must d0)6dh(zlyeap 4dhad + wew*4pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic fiel0 6pehh y4)ld4wz*adddea+( wd at the center?

  How many turns should a 10-cm long solenoid ha;i8ik x9od5xyve 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 rece-o-qf. x-b+ 3;+fmp xmt(n lq;wfa owtangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.qxa +oxptqwf(wmbeo--+ ;-n m3; ffl.0 cm?

  A circular loop of wire of -ugnh b+l33 m9n)aupv 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 of the loop is perpendicular to the- gumv)ul3np3 9abhn + magnetic field?

  A circular loop of wire of cross-sectionalg si6d5jg( rpwz *n,ja,;e,td 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 ax //07abfievin a magnetic field of 3.5 T. The loobav//i fx07aep has 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 radius 0.50 m is in a uniform m1t.fl8/ oq cpbagnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magneof.c b q/tp1l8tic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m : bx,q66uo2e anrqncz0,c,nh, *pm zeis in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque rabc unn ,6q20,zpem6oe:cz,n*,xqhwhen the plane of the loop is parallel to the magnetic field?

  A circular wire loop of arewo4 e0i/u.r 6-zoyt zq7d(v :rpjvyg,a $0.25 \; m^{2}$ 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 sing doi:v k ,zcj(t8a56er sfp(r3le-charged 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 ve7)pww a/bc-3 a :j*0kpyswszglocity $6.9 \times 10^6 \; m/s$ 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 movesvg 2/bkx upoi+ c+ 0levm9(:sp into a magnetic filpvi0 cvk2/: +xms 9pug bo(+eeld of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from resz43wovh7i lx0s r- r 4).slbtat through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direcbr3t7s0za -)vxs wio.4hll 4rtion of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 r yk-8 f;ap/x8qhgc0:zqmf9 c 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-fieldzcq89/c:x rk 8hgp0fm-;fay q is required if the particles are to be undeflected?