If the north poles of two bar magnets are brought close to efq :6 lm7at7f1dm 9vjsach other, the magnets wv7mfa9l t6m:q1 d7fjsill

  If the south pole of one bar magnet is brought ne9 bz4zfu a84eyar the north pole of a second bar magnefze4 8ba49zyu t, the two magnets will

  If a bar magnet is divided3fthcn,2qp 9g into two equal pieces,

  The Earth's geographxzmfl 0gsvla9jknt-n; ;3)g: ic North Pole is magnetically a

  The south pole of a magnet poisa7*p3 j3rncrd /zan 7nts toward the Earth's

  An electric current produ8nbrpz3uzms z2;z1 3,j2 i putces

  Which of the following is corrw7ge xa-mm*rf(/te8fi 468 bmv xevp)ect?

  A vertical wire carries a current straight down. To the eas4akm4t0( )mrdks8y bei 2qu/mv2v-ep t of this wire, the magnetic field po/2mte(ryi4p mq kasum 4evb v d2)-8k0ints

  A horizontal wire carries a curr(id* (nd) n tu8vzfhkk* yfy-6ent straight toward you. From your point of view, the magnetic dh ufy*8tzyv()f nkkn6- i* (dfield caused by this current

  A current carrying loop of wire lies fl8j6uozpub,m *m+u slu2 srx -.y(;ojb at on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the dire obmmuuu;ypx rsz26u*-j.s,oljb 8 (+ction 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 table top. When vie6z d h+t1i1jehmcc(r- +ea7r wsvj :/xwed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic fieldej6:/j-r aci 7cwx( r1hzs++thvdm1 e caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field ictw( vrkx 7t2oa333urs the

  1 T is equivalent togqix.s8 qv9 i(

  The direction of the f5t48 tpaj1pt yorce on a current-carrying wire in a magnetic field is des5 y1tjtp t4ap8cribed by which of the following?

  The force on a current-carrying wire in a ta;gxrqxqjv3m5f8m :w.45 sq magnetic field is the strongest when

  The force on a current-carrying wire in5dz njom.+c/uf1po).,c , zpy u3lays a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region wh5k(bo1i. gvt zd-rdlyuy3 .v4 ere the magnetic field vector points due north. Wt.ddyy.5ib-okvr4v 3( lzu1 g hat is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnh* (d0s xicy8eetic force. From this we can conclud8hicxd yes*0(e that

  A charged particle moves with a constant speed through a reginj;z 3 -y+kc9o5lpieaon where a uniform magnetic field is present. If the magnetic3zk9n a+5 ljo;iyep- c 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 fipbg )+yiq:rt*eld. The magnetic force on this parrp+ g ti*:yq)bticle

  A charged particle is injected into a uniform magneticx : hke4fhkv4boy)u.za v/)dg3g (qc0 field such that its velocity vector is perpendicular to the magnetic fie)4.bcqev duho)v g: f(kg0/h 3a4z ykxld vector. Ignoring the particle's weight, the particle will

  A charged particle is o4cw78h 3t4rbhhpw3oc6pqqg j xd6/5cbserved traveling in a circular path in a uniform magnetic field. If the particle had been36q d/4 hthqbw cgcwjcrxhp6p37o458 traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e lc *0pb3pg9 oftravels in a circular path in a uniform magnetic field. If instead the particle p0pl fogc9*3b carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in8bi4 r)pqbm u- a uniform magnetic field that is directed straight downward. q)ubb-rimp 4 8 The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed wf:n f8u1 jw2zdx j)6wto curve upward as the result of a magnetic field. The direction of the magnenj: 8w2d zjuf6w) wx1ftic field is

  An electron moving al n:han1z)1y ncong the +x axis enters a region where there is a uniform magnetic: n1)nhzan yc1 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.)

  The magnetic field produced by a long straight current-ca cf*9r/xq8gu v(dj- parrying wire is

  At double the distance from a long current-carrying wire,q*2 ysij;dt n; +vc3lhrfv8v6 the strength of the magnetic field produced by tdyh3v q vv82ln;+rj t6 *;fcishat wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry i2 u z.o3dkd9jodentical size currents in opposite directions. The wire on your right carries current toward you, and the wire on yk3z.o 9j2dduo our 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 plas) cn 4t6 4o ,tf/oo/ilb;yukaced side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactl4ya ,tk)b6o u4cotfl;sni// o y between the two wires

  Two long parallel wires carry equal currents. The magnitude ,- 5ls+oh frpkof the force between the wires is F. The current in each wire is now doopsh-f,5+klr ubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A pr ep4tjngxz(t)zbf:l,o3 7b 5e oton moves toward the east alongside and just south of the wire. What is thefzn7 zb(t)g, xje3l:4o5p b et direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom of t 1/rrxh dzwp2+he page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in w+/h21d pzxrrthe plane of the page, from your right?

  Two long parallel wires are placed side-r*j q/5a)d.zm 9px9ipxxsd o 3by-side on a horizontal table. If the wires carry current in the same dmz)xardxd5/ojxpp3. 9 9* qsiirection,

  Two long parallel wires are placed side-by-side on a horizontal tm7w2 l x1,ilmeable. If the wires carry currl 7wi 2mme1lx,ent in opposite directions,

  Consider two current-carrying circular loops. Both ax q0cykx; vkw/e4d m/:re made from one strand of wire and both carry the same current, but one has twice the radius of thdk0yevmx4:q /w kx;/ ce 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 k) i3 );p6dufo62zdjoehpzga x;fh4;made from one strand of wire and both carry the same current, but one has twice the ; zao di)4ujgoh2h)kpf;;p636efz xdradius 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 carryiej ht5rmkd4uj( 0s9lkm8qv, ,: xu is5ng loop occurs when the angle between the loop's magnetic moment and the magnetic f5 :ju5msve9jm k,hq tk4,( 08dsrlix uield vector is

  When placed askew in a magnetic field, a current cacjz k0rka2 9*orrying loop that is free to rotate in any direction will experience a torque until iz2kjkoa* 0rc 9ts magnetic moment vector

  What fundamental fact underlies th rlud0j3v5 lp9e operation of essentially all electric motors3dpl0rl9 5ujv ?

  A circular wire loop lies in a horizontal plane on a table pv*/h dluq,)u-gjcr/xpcr ;88 x*pob .fj -owand carries current in a counterclockwise direction wh rf/;/ gxdp,vrpwc -j8qcjo .pu*-lu )8ohb*xen 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 interaction with the magnetic field?

  In a mass spectrometer a pr.dzu)m:,8rua d6fk oarticle 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 vrkr 6 ,uf:8mzd.ud)oaelocity of the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consistcb;nc.)jxs7qhg6(aa x.u +e ms of a charged particle passing through crossed electric and magnetic fields. The forces exerted by . a)ba hn6jgxqxu;mcc7+( s e.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 carrying a current of 0.60 A is oriented parallu-;xtib 0idi p* ec)/pel to a uniform magnetic fiexd; t/-pc0epuii)ib *ld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in ay37 q f2fwg*tj 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 wireu,kr+ qylev3 lyz(s6( carrying 5.0 A when it is placed in a magnetic ze(+6 r( 3yusvlqy lk,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 gz))9kjrz z+t; i3prsa magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight ofrs +) j3g)zzptr zk9;i the rod?

  A stationary proton is in alj6(2re/ l(ch vmh,tl uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force ote2,h vm l(6hrj/ (lcln 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 speed of zi15 ptivu+ss;1)p5eawxd .d h1shn1 $5.0 \times 10^4 \; m/s$ 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 o( rar+)a ax9.wtt3rg yr 1j; wc*xdev(f $5.0 \times 10^7 \; m/s$ 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 spee((fn *3g-svg7c ;js xsuym8zo*fwny 0 d $4.0 \times 10^5 \; m/s$ 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 s/n4ys f1.ht p3swk; ;-byh szypeed 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 speed of ev-j)kg cn.br re b+. sof3:y/$8.0 \times 10^6 \; m/s$ 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)cmhcjw*.7 in $3.0 \times 10^6 \; m/s$ 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 lkk51 nkszo5, 25 A. What is the magnitude of the magnetic field 55nlkkz1kos , at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what . jbdr,e)2 m/3;tss /i,xnw in itee8omagnetic field at the ground, 10 m awa2msi/e, e,/n .3xnw r8eo id);bijttsy?

  How much current musddizrr vqd) w0 e45d4ozcpp-8 2i7d:dt 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 cur) rxugwqd ,;p)ef.y 9qrent of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strengqx9;),y )e.u gwdp qrfth 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:6f2+5od6fv liqcv,eig cm)zre separated by 40 cm. What is+ol, v6c ig6z2vi:f )5dfceqm 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 +roins* xz(f6 carry currents of 20 A and 5.0 A in opposite directions. The wires are separatonz6i* s( +frxed by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A +z1q 47daskr*dbsf .qand 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point betweena d4q*fsrq +z d.bk7s1 the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same dir gr2+lcdp6p-qq xn: s0ection. 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 wiresxq 2 d pglpc0q:-rns+6 experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposite direy, evjl0vhzp4vy4-y*ed+ mq *ction. The wires are separated by 0.30 m. Find the magnetic force per unit length betwzyh,d e-v l*jqe*v0 myy4 vp4+een the two wires.

  What is the magnetic field at the center of a c1 ; p+qaclbn /xa-b+k+* uivbzxb ga99ircular loop of wire of radius 4.0 cm when a current of 2.0 Axab ub/ li*+-g1pvbaxnac 9b+9 k;z q+ flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic n2vad8hkyg,a4 hy+ l0field is produced at the center of the solenoid when,a hgh d0vny4+ a28lky a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. n 9n ,8tvgb 2banrgi*:What strength of magnetic field will it have at its centngtvbbn air829,* g n:er?

  How much current must pass throughyy nyw- b;4g-n a 400 turn coil 4.0 cm long to generate a 1.0-T magnny4y- ; gny-wbetic field at the center?

  How many turns should a 10-cm long solenoid have if it m6rm7vcr rt.px36 m 9nis 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 that carries 6.0kja 8/.d 7.n0bonuv eej1ep;n A if its dimensions p. ;k0ene8nu. v7 jaj/ 1nodebare 4.0 cm x 8.0 cm?

  A circular loop of wire of 5-r03 f wxpr08czg cplradius 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 pg3frplwp -x c0 5z0rc8erpendicular to the magnetic field?

  A circular loop of wire of cross-sectionaz ra* 5c1zgbj; yf6xe+l 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 carryhgw o*99yiu1 e ofx;/ging a current of 2.0 A is in a magnetic field of 3.5 T. The l* /f;ihuo1 9wgyxoe9goop 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 m8-vro vgofniy:(q8x* agnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of - 8:f*nx rvooy giq8v(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 0.3)jaf s+q:ktl8 0 T. The current in the loop is 2.0 A. What is the magnetic torque when thk 8 a:qfsj+)tle plane of the loop is parallel to the magnetic field?

  A circular wire loop of 00js rqups,pax9fiws x80 ;d1area $0.25 \; m^{2}$ 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 speed 7v2em t3 ruz.eof $1.0 \times 10^6 \; m/s$ 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 uniu wsp4t2d6y1x* g. 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 throu p 0x n)1y2my3lux*xqagh a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is theuy m0axpxx)3 y *n1ql2 radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a mev3t /fe r9nh4n m7u9tagnetic field of 0.30 T oriented perpendicular to its dervum/7 tn t9ef934 hnirection of motion. Determine the radius of the path it follows.

  A beam of electrons is4mp(l fp (hf.q accelerated through a 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 ip(4lf.qh( fpmf the particles are to be undeflected?