If the north poles of two bar magnets are brought 00ja4 .sqc 8rh/9jbq+ftly rq close to each other, the magne y4j rb +0q.qf9rhtjlsq /0ca8ts will

  If the south pole of onmf7bzk 8i5 8ene bar magnet is brought near the north pole of a second barenk 8bm7z85fi magnet, the two magnets will

  If a bar magnet is divided into two equal piecz5x 1 foi k.) qp.dpc./n;/iop ,sszvvk *o4tzes,

  The Earth's geographic North Polka:c .x w/h-;ura ;dqpom -w/ z5v+mape is magnetically a

  The south pole of a magnet points toward+k ee)m: jqzs8 the Earth's

  An electric current producesaa nwrx9mp0 ;0

  Which of the following is corrs.:(lol8:t4de e jb pzect?

  A vertical wire carries a current straigh;c iu j4xu/nd)t down. To the east of this wire, the magnetic field 4u/ n cj)xd;iupoints

  A horizontal wire carries a c-i p zra/ztdfubn7x3w88h*u 3urrent straight toward you. From your point of view, the magnx /78nab 3prdfuhwzz u 3-t8i*etic field caused by this current

  A current carrying loob+ pvd:r 1ssk;t-ik1 yp of 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 ts1 dp-+bkr;iys k1 v:by this current, outside the loop? The magnetic field

  A current carrying circular loop of wir5 ot:lddv su /4(le1kke lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the dir l54u1t/d ekk(s vlo:dection of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is kkn1aq.ya(ijwz8qy 99g ) wtdhyr *39 the

  1 T is equivalent top10khf/:uh w*tt 5wum

  The direction of the force on ldx*b3r dq40 ocrr94 ca current-carrying wire in a magnetic field is described cx34*o r d9l0crqdbr 4by which of the following?

  The force on a current-carrying wire in a magnetic field is the,,x dx/o h;5klofws.o strongest when

  The force on a current-carrying wire in a magnefjt8 k4v 4 .6zpvau8gof5yvv 7tic field is equal to zero when

  A vertical wire carries a current straight up in a region where th ri cn7ktg10*jimih +(e magnetic field vector points due north. What is the dir h7i+ jtn(*gck0m1ir iection of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we canzm1ftb:e/1j6 qi-r ng conclubgneqij:-r 1m /z16tfde that

  A charged particle moves with a constant speed.4bqcvf/ea/a db ,5yb t5f 6dz through a region where a uniform magnetic field is present. Iq6 v /a.eb4b5, a/5dfbty fzdcf 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 fieltmua0 k 6dfppfvu ,)-9d. The magnetic force on this parf 9-p,)p adtm fku60uvticle

  A charged particle is injected into a uniform magnetic fiel8kwdyo3 ;wc35dn-e,o+dfuf yd such that its velocity vector is perpendicu+y of,dcdun k;3 3 5fy-8deowwlar to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observedszwei8+f8c k3a s/ho: traveling in a circular path in a uniform magnetic field. If the particle had been:ie z ks3ha8wsofc8+ / 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 un07s9g1z n:r 2bwmqr7n /xxzheiform magnetic field. If instead the particle carried a charge of +2e, the radius of the circw71rh /gns ez2:0xmxbn z9rq7ular path would have been

  At a particular instant, an electron moves eastward at speed V 9v0smx 7b vw*h/qg/tgin a uniform magnetic field that is/g *7 vhtv0qbg9w/msx directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwardale(c 7 d/lq acv*f.r; as the result of a magnetic field. The di cel.rfa7 ;/c( d*qlvarection of the magnetic field is

  An electron moving along the +x axis enters a region where there is ddlde) w 45*sl5;wnb9lyo)sf 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 oudlfdesb l4d)95*ns ;w y)w5lot of the page.)

  The magnetic field produced by a long straiga9tlu,g6a0x05/r hjcki: t hjht current-carrying wire is

  At double the distance from a lwh1 gb7 (-byscong current-carrying wire, the strength of the magne(ws-h by1c b7gtic field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizont+6ip i de+vd/jal table carry identical size currents in opposite directions+iveji6p/ d+ d. 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 midway between the two wires

  Two long parallel wires placed side-by-smq2dvt2rfhk9vflsev 1lh5ew0/ 6 +( iide on a horizontal table carry identical current straighvr i9(0l256k1te mv+sedhw/2lhqvff t toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. +1gbbb2l- rwe The magnitude of the force between the wires is F. The current in e-g1b e+b l2rbwach 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 proton moves towarxc (.r.t hip6u/jw)d dd the east alongside and just sti.cx.r)(jw6du /pdh outh of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the pagibxq 1kox ,y 4l+ o8pp3x)pwq1e 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 perpendicularly toward the i 81xbpoopxyl, 4wk3p1x+)q q wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal table. + 8t vtt( p+o4. p)wvzdhxi7yfIf the wires carry current in the yv8v o+dpti4ht)pxftw+(z.7 same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the0 iuzs/ .;o; qt,hsyfx y/i01comx2pz wires carry cuxz s/iq/.tf;1m;hioyxz0 , posy02uc rrent in opposite directions,

  Consider two current-carrying circular loops. Both are made from o usbnc(bc+d+fa f ,g-:g8 whn)ne strand 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 field at the centw- d bc+n+cn8u:sh gagf,(fb)er of the larger loop is

  Consider two current-carrying circular loops. Both are made r49lzoo al, 1-3f: x.- zquiccypm,xq 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 magnetic moment lxr-ila3 1co:qq4.zz mpu,o yfx-,9cof the larger loop is

  The maximum torque on a current carrying loop occurs when the angle between tpf+bmvfqy(*i x)-8mthe loo+qi vbmy f)*p(xt -fm8p's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current caraq: n4 bzv-r,xrying loop that is free to rotate in any direction will expv n-qz a:r,x4berience a torque until its magnetic moment vector

  What fundamental fact underlies the oper*c emj69p2n rmu) 4mwbation of essentially all electric motors)pnmm* mrj4wu b 6c29e?

  A circular wire loop lies in n; ygk,w: bss4 ljvlrdqb-;;1 a horizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points q b1ygnsl ,s;rb:;kdjwl4v -;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 x0tz4s mx8u5mand charge q is accelerated through a 5us4z8t 0xm xmpotential 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, V, and R.

  A velocity selector consists of a charged particle passing through c+d8afhfqq*;mi f 0t y1rossed electric and magnetic fields. The forct+dfm0*fqi 8a 1qf;yhes 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 direction should the electric field point?

  A 2.0-m wire carryingrm9vx0:s0+zda9d s8 clvl1y ewd9 w2w a current of 0.60 A is oriented parallel to a uniform magnetic f dd:09sryxse wmdwl9wlv 1a 9c2vz08 +ield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A is9:pjlf r2 ab2ow 0)zqn 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 5.0 Am*1 )i;3- zdvqax5 fz:sy bhma when it is placed in a i-bx;3zhza 1 vaf 5d:*my)mqsmagnetic 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 magnn h ;39 w/qu7pfpx eeut-v-hn7etic field of 0.10 T. What minimum current in the rod i37n t7vhx/u9 - efq-nw up;ephs needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a unmt4up7t:y *7go yjwido.*xuvp(0)k siform magnetic field of 0.20 T. What is the magnitude of thekupo*j.0pvd o )ig tm7:7usx*4(t wyy 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 spembg y mk2.n171p0 cf/:mkjxso ed 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 a spey( q s8m 4ul-m*qmnv:wed 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 s*jhrb /e:2 hkgpeed $4.0 \times 10^5 \; m/s$ 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 of e,94cu xww)ue$8.0 \times 10^6 \; m/s$ 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 speed o-ugz *1v*ry grf $8.0 \times 10^6 \; m/s$ 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 c: apwzt,,mb xp:zg:h;*c d.g$3.0 \times 10^6 \; m/s$ 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 cy 0+c q4eow chu tj.wn/27v9ga current of 25 A. What is the magnitude of the magnetic fieldc w /24jn.oehcquy w9tvc+0g7 at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A gen, i3aa g(ejix6erates what magnetic field at the ground, 10 m aw6 3aaxj, ei(igay?

  How much current mus kua;lh3-bc h0t flow 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 5.0u), ndjo ll tjsr9/58se4lyq d.z(;zg A is the magnlzgsrj/e(45ltjy ;8d 9 z)o.s,q dnl uitude 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 directions. Theyu j 0ym/-nkf6c are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm frou0n/ mkycf6-jm one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in oppo88z* qrq. (mgd723vrnc rcd irsite directions. The wires are separated by 0.20 m. What cmrdg(ivr n 7r2 .dq8*83czqr is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in oppos9 m8ru8nr-x s 0v/de 8zpzdje-ite directions. The wires are sepsjz-/p 8 edd 9xr8-rvz8 mn0uearated 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 direc5rpv4c)cke .v2bdxr1k w* bw8 tion. They are parallel to the z-axis, an4v5rd k*kbwcc e r2.xpb v)8w1d 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 elm4hw/p. z)58lfmmt* rm9 fxof 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 be8ze9)x5.l/fp r wm mmt4flhm* tween the two wires.

  What is the magnetic field at the center of a circular loop of wire o2cvoxo6 yr29 bf radius 4.0 cm when a curr6o9rc 2ob vyx2ent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 tui6 x xh68qy abk5f1.nrrns of wire. What magnetic field is produced at the center of the sr6byxq ia85x6k1. hfn olenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. What sve . /5bj7xjkln. *wmttrength of magnetic field willlx7j5b*nt kjwvm.e/ . it have at its center?

  How much current must pass th,drg p5/:dur crough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field atp:r r cdu,5/dg the center?

  How many turns should a 10-cm long solenoid have if it iso02 hf+h5rbo d 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 tur6i34 pov(4sx-kdb8km1o uz x jns that carries 6.0 A if its dmbjo8s vk 6kx3i xzou(14-dp4imensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magneticac0*z ,( ds w,zqffop2 field of 0.30 T. The current in the loop is 2.f,sq oz,pa*0( f2zc dw0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cr1q-rjdlql0 dc42, xysh 5d d)ross-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 i3as ,rw(+ik7njaj3;,.y1j hstqtbt as in a magnetic field of 3.5 T. The loop has an area a k b+,yhs(jtriqn w,t.st331a7;j ajof $0.12 \; m^{2}$ 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 mn jwv+ 1/63gy nhtucok4l,ux4g1l-ob agnetic field of 0.30 T. The current in thggo 3n1nj6yuclbl4 1 uvo4w+,h t/ kx-e loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of q/+g/osj ,;, sel gbitnz s5mhv7g7t :0.30 T. The current in the loop is 2.0 A. What is the magnetic torque whenn:imvhsss; g/ejqg+77,tb/ ,ogl5 tz the plane of the loop is parallel to the magnetic field?

  A circular wire looph5gf9; ki7.ihdej 5wa of area $0.25 \; m^{2}$ 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 singleub+ uqgv5w4;k -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 8(k wa pq)xb*dwith 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 magnetic fjqd,7j y t45heield of qte57 dhjy4j, 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest thro/u zp4x*zsn8 s4oqn3r ugh 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radiu nqxs3*/zzosr48npu4s of the path it follows.

  A beam of electrons is accelerated through a potential difference of 1 anb( iydcv-ty*d.3 z(0 kV before entering a velocity selector. If the B-field of the velocity selec i( *zbdcvnayt -3d.y(tor has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?