If the north poles of two bar 7 -+yl jmq:qbzmagnets are brought close to each other, the magnets bzyq7m:-l+ qjwill

  If the south pole of one bar magnet is brought near the north pole of a second bfexlw2a w 23y/ar magnet, the two maa /w x2f2we3ylgnets will

  If a bar magnet is divided into two equalq+als129aut p 9o)c0dqm ) hnu pieces,

  The Earth's geographic North Pole is magneti8w9h/uwxw 8h th )zfvfgf5lgx 00-yg7 cally a

  The south pole of a magnet points towat jhzgry-j u(yi0-0 d4rd the Earth's

  An electric current dfmsxgf 21mlg 0jk1yy(5 t-h3 produces

  Which of the followingltxsl.2,0 bk:zlf/x8 emu o,b is correct?

  A vertical wire carries a current straight down. To the east of this wire, the pbw )3fq)r l2rmplr3 )b f)r2qwagnetic field points

  A horizontal wire carries a current st+a/yacwqt k-; raight toward you. From your point of view, the magnetk-a;tyw +acq /ic field caused by this current

  A current carrying loop of wire lies flat on a table top. Wh msr y8r3cu; ty6*hg8 fg1r1bien viewed from above, the current moves around the loop in a counterclockwise sense. What ishrgrgticm8y*rf;ysub1 1 386 the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a tawl evqae -2 nsqu.4 kg-cns.wahi2*39ble top. When viewed from above, the current moves around the loop in a counk32weh*ql4-vaun 2s s.igqwa.c 9 en-terclockwise 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 pm;(3utt tqy+ is the

  1 T is equivalent to vl n9t;1u0w2 ybyxs :dzlqk87

  The direction of the force on a current-carrying wire in a magnetic field is caqqi*7e4 . tqdescribed by which of the followi 4qitae7c*q. qng?

  The force on a current-carryiwk *v rh71ovg58o+ xvh ez4ak2ng wire in a magnetic field is the strongest when

  The force on a currenthepb *ka,lic./zk0 : f2 xhac0-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up igd-r+is 2 3sran a region where the magnetic field vector points due north. What is the direction ogas-r3d+s 2 irf the resulting force on this current?

  A charged particle moves and experiences no magk)h3 0 3zx xy8)aynpxsnetic force. From this we can conclude p) as) z33 yhxn8kyxx0that

  A charged particle moves nebcmpsk*8 g28 .f z8sg:afd4with a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straig s2anzkg d8884eb:m pf *scg.fht upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle movesf.c *jsab+qk hu/b; ii)3suh 6 across a constant magnetic field. The magnetic force on this partiuusk.if) +6;a/h3bqb i*chsjcle

  A charged particle is injected into a uniform magnetic field such tha b ff5e/5ipggm) x-gf6t its velocity vector is perpendicular to the magn6gf5p/f-fx i m5)g gebetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling iuy:9 g3 ztzf;l, 3eubjn a circular path in a uniform magnetic field. If the particle had been traveling twice as fastjzle93,uzgf:y b3 ;tu, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circu bapu(54x4cn msz, wl3lar path in a uniform magnetic field. If instead the particle carrbazl43su ,c( p 4n5xwmied a charge of +2e, the radius of the circular path would have been

  At a particular instant, ankcft: u :qx+ze(ayh5de 7m) 7o electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The7 uxzme5cahet7(f: k:y+ d) qo magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to xp 1,mp*p)bjl curve upward as the mx) pj1p,*lbpresult of a magnetic field. The direction of the magnetic field is

  An electron moving along the +xiie/axg+z6:m koj.r 6 axis enters 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 page..aki i+xjzr g:/6 e6mo)

  The magnetic field produced by a long straight t l if6m,5yg we1:;ws9rr ,yelcurrent-carrying wire is

  At double the distanceojwwon582s9m d (8 xvc from a long current-carrying wire, the strength of the magnetic field produced by that wire cosmwd2n5w9jo( xv88 decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry s83xgpoq r4a: 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 field3srx8oap q:g4 at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carry identiur3dm (q hb:k+cal current straight toward you. Froq hrdu+k(3m:bm your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the forcfz qe6zv3ij8b 92mea+uy) m b8e between the wires is F. The current in each wire is now doubled. What is theeyazbb9 zm 8j2+v ) 8mu6i3fqe magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. b l(0vgc p6xp/A proton moves toward the east alongside and just south of the wire. What is the direction of the force oncb6 (vx0ppgl/ the proton?

  A wire lying in the plane of the pge7c/4xu , rtmrc3a :mage 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 perpendiculm3 :a,cucmt4/r r x7gearly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizonvt7uq;vs ,dzey /1. yqtal table. If the wires carry current ;yq de 7vs 1yvqt.z/u,in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. .; t tgo k7r3zd8fb6nblb8 ni6If the wires carry c torg8bi.d7; 3 8nk6flbbzt 6nurrent in opposite directions,

  Consider two current-carrying circula5s8 b0jz h;ma, qme6nufx3pep+cz0yw9 3 qkf5r loops. Both are made from one strand of wire and both carry the same current, but one has9 znsmm+5, qcf5q 3z 8f3p0juwxyk bpah0ee;6 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 circular loops. Both are made from one strand ofssop9* h5bgt- wire and both carry the same current, but one has tw5o 9*sh-s ptbgice 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 thet ;x dz g.9c7*wpxe/pb loop's magnetic moment and the magnetic field ve;9bx.wg/ zppx c7*dtector is

  When placed askew in a magnetic field, a jr0/ig-p;s-3fdw t zycurrent carrying loop that is free to rotate in any direction will experience a torque until zri0-j-s tf3 d ;/pwgyits magnetic moment vector

  What fundamental fact underlies the5k5 ltilk5)m g operation of essentially all electric motors?ilkg t) l5km55

  A circular wire loop lies in .g.7c7lvzfqcbvf.-/ m8mnpj 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 to the north and dips below the horizontal. Which side of the coil tends .-l.zj c fvq8/pf mmbc gn7v7.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 0w :0(f vsscuvaccelerated 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 v s0f(sv:wc0uof 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 crossed ele.hybzko nc 40 nu bhb)lw)(5(rctric 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 ubzrw y 4))h n0bo.hbk5nl c((east, and the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a bolgr-2ffkk *vg 5 34ncurrent of 0.60 A is oriented parallel to a uniform magnetic field *klfnr g2 kob5v-fg43 of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction ofw 59 y8l.niojv $30^{\circ}$ 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 mev ohdm xa1tswpgoa (y8++ :j+5ter on a straight wire carrying 5.0 A when it is placed in a magneot5xagp+ :aj wd y1+mv+ h8os(tic 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 magnetic field .;ew cv55y smaof 0.10 T. Whacy m;.va5ws5et minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uni:lttk xrz2u 8f3p4w8tyq l. -cform magnetic field of 0.20 T. What is the magnitude of the mag ttrypq4x. -t2lk8cz:3w8lu fnetic 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 spk f 95w fzb,+ke*4kxgqeed 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 r;6h t3 da;v2tytr: rfv( qymhe)(klu8 8;lmza 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 1g :;n d,upacl5jj5gzdue 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 of5nyvu6, i.lm2dk *f:n pys dz* $8.0 \times 10^6 \; m/s$ 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 amneaaieonm fo +i g2l85:65l1 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 ofxq8 -oq2yaypv6)nyfhpl*+ dc( xu. . v $3.0 \times 10^6 \; m/s$ 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:;y41 vnh xdxu. What is the magnitude of the magnetic field at a distance of 0.15 m from the wire?nuy4dh;:xv x1

  A high power line carrying 1000 A generates what mtl p zg1ihzmb;-.qwt*6 -nne0agnetic field at the ground, 10 m awagp0m1iqtbz; nle. -t6w-h n*zy?

  How much current must flow:a-oo yn;6*q,lycxufes7jj 9 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 f8u7 y/r f5,ewheflb e 5:bq3ka current of 5.0 A is the magnitude of the magnetic field due to the wire equal lkfq :bhef uefr8e55 ,7/byw3to 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. They a-+xymx gf1 w0ere 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 cm from the oth1+mw fgyexx-0er?

  Two long parallel wires carry currents of 20 A and 5.0 A 7p91./zrzpips+b5nj/ icdw rl 0eq t) in opposite directions. The wires are separated by 0.20 m. What is the magnetic fice79p sn/ql5dw+r.izb zr0)t1ppj i/eld midway between the two wires?

  Two long parallel wires carry currents of 20 yyi3u g627( ivp n/nnnA and 5.0 A in opposite directions. The wires are separated bypg2uy3 /i7nny 6i (nnv 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wirexlkh(tf9) c k:s each carry 2.0 A in the same direction. 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 mxf:( kl 9tk)hcagnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0p6tpz, ; f as mz/s1qdppay2c0bx 11n b(jz-i( A and 8.0 A in the opposite direct1;t1,ppjq s a-z1 z p (sd 02m(nb6x/yfzibcapion. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wwb vvtg8e8f6l1f, u qw7j+g9wire of radius 4.0 cm wh7 91b uewj+vf8w8lt wg6,vgqfen a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What c4;hjo yf5ilg;*5 nvf magnetic field is produced at the center of the solenoid when a current of4h;;fc fgvi5 y*on5j l 10 A flows?

  A solenoid with 500 turns is 0.10 m long and cf plf hmq+7-;o 63ff1 du3khcrarries a current of 4.0 A. What strength of magneti331f f dqr h k;uf+6fhl7po-mcc field will it have at its center?

  How much current must pass through a 400 turn coil 4.0esd/s ptc;y96 *a7oyr cm long to generate a 1.0-T/9 csty;ry da6se7*op magnetic field at the center?

  How many turns should a 10-cm long solenoiddr/9oj i ua n:y2 -79jhjcp-5 qez9akd have if it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic momfy,c;i z2(g jt ffc- u)(iswa anxa-*+ent of a rectangular loop of 120 turns that carries 6.0 A if its d, ixgna( -(f-i;us)fc z*tay2wjcfa+ imensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform mir ,4o 3zoc 7+p/zikjxagnetic 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 magnetic fio p c+73x,o i/jzkir4zeld?

  A circular loop of wire t 8u odnhz*49aof cross-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 magneticz5e7m0a v )ewskr1j mo *kq;uv mz/*b4 field of 3.5 T. The loop has v* m ;mouq41as* 5bewv/0 rek)7 zmkjzan 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.yjca) dc9ot(i;x 315 s.wgt du50 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 parallel to the magn5td) ti d9(1;cuwyscj. xoag3etic field?

  A circular loop of wire of radius pcya/.fec-;b do 8g;w0.50 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 parallel to the magnetib.ce/y-; d ;ocfaw8pg c field?

  A circular wire loop of are3 t5h4qq/b s;ot qybw: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 ssgosj4g3 539qn(ik isingle-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 ns0p. xzw5 hv-*vv*o fwith 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 awd8af+f)-xi w magnetic field of 0.040 T. What is the radius of the proton's resulting orbia 8wx+f)-fidw t?

  A proton is accelerated fajt41s0ygn8 gne ;v6hrom rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular tos 8vy anh1t0jg4ng;6e its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV befo/gbla 93qit5shm 31 uore 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 i93abot3 l5sig1u mh/qs required if the particles are to be undeflected?