If the north poles of two bar magnets are brought close to each othll,7v2ivcen 37x lh3m er, the magnet hc3el 2lmlinv,7x7v 3s will

  If the south pole of one bar magnet is brought near 8+vdw6g bjrp v0y28jv the north pole of a second bar map+vyjwjg vd 62bv8r8 0gnet, the two magnets will

  If a bar magnet is divided into two equnoz.av4 ag(bs m046fi4qayg ) al pieces,

  The Earth's geographic North Pole is magneticalus6vsynw9j8xkw3b 5 . ly a

  The south pole of a magnet pointsl r0r af).i ktck2s;k9 toward the Earth's

  An electric current producv; 93u.r3 (a 7l5mfntnashitaes

  Which of the followidqzh9jq ch.* )slgbbg4/d 5c :ng is correct?

  A vertical wire carries a current 4wl/f w (9kz tn uy:*ij6+crkzstraight down. To the east of this wire, the magnetic+w4u/z nw*fikjy69lcrtzk :( field points

  A horizontal wire carries a currentqkq.3 .cmqgv p2 x1:b ji+okgi(k/k )b straight toward you. From your point of view, the32bo vg(i cpb1qxqj.kg .km/+qik) :k magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. Whe/m/booo2f 2txn viewed from above, the current moves around the loop in a counterclockwise sense to2/2f mobx/o. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circulacsuld m(-eq7h+ x:k6mr loop of wire lies flat on a table top. When viewed from above, tk(+ems dqm7h:clxu6 -he current moves around the loop in a counterclockwise 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 is thejayxemoc0u;eh 09w o2/z .(aj

  1 T is equivalent to* fajo l5;x7 5a*swdpm

  The direction of the force on a currefp. u i6 w+,svaybnv4u *ep/by2hx ;+ent-carrying wire in a magnetic field is describ.6vp * u+i;sunew ,4ah2yb/vby p+exfed by which of the following?

  The force on a current-carryin w *xc5hop;abz.1m/h zj 5-motg wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field l a o9,z.ewv8 y f9tf-hxi/w,tis equal to zero when

  A vertical wire carries a current straight up in a rkym6kx a( 9nb-egion where the magnetic field vector points due9 6knax bkmy-( north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force.vy-i fvxs5acb+x0/y0 From this we can concludev5 /i0sbyc 0y+af xv-x that

  A charged particle moves with a constant speed through a2 y,xe0hr r,ls region where a uniform my,r0, exhls r2agnetic field is present. If 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 m dwr1j.f 4omm4agnetic field. The magnetic force on this part1.m w4 odfm4rjicle

  A charged particle is injected into a .lfg;e ;x*y7nu k 0yapuniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the part7y* ;.fnuxekp lg;a 0yicle's weight, the particle will

  A charged particle is obseym lwr*fn5 r2ti7 53svrved traveling in a circular path in a uniform magnetic field. If the partir3n 2 *yiw7 sfmrlvt55cle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circulao/ s:7g3d.zp as rc;ldr path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular o cd:pa g;3s z./r7dlspath would have been

  At a particular instant, an electron moves eastward at speed V in an s4oydnvf ty9t54*i( uniform magnetic field tf5( y4*in dyvn4 9ostthat is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curv fnv*1of:,o0x-u cxaye upward as the result of a magnetic f*xyvfn0 c,:ofua1- xoield. The direction of the magnetic field is

  An electron moving along the +x axis enters a regio.g-q )r ybe;* yq2h4jf7 esiuyn 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, )eysbg;uf.-j7 r q yiqyhe2 4*and +z out of the page.)

  The magnetic field produced by a long straight current-carryi(:,hvzxe ijjyr0v 3+ zng wire is

  At double the distance from a lonqx77dy38x /qg l 1aqcag current-carrying wire, the strength of the magnetic field produced by t/778dgxaq xyqac3q l1hat wire decreases to

  Two long parallel wiresyjqg4h:dxw8rlar (. w vc-t ,( placed side-by-side on a horizontal table carry 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 field at the pointgv4h,c (rw(8a t -jwxryd.ql: exactly midway between the two wires

  Two long parallel wires placed sid(ng 7a/k+,plo k 8ffube-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic k8ul+kfpn7fg,b(a/o field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the fo u2dhjlf y0xlu,g) q2*rce betweenl x2 qdug*2,y) hlfuj0 the wires is F. The current in each 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 toh of0; )9/hn8ck fsccaward the east alongside and jc;cf 8 n/khfoa)9ch 0sust south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane3pbue +wn.uox5z)g6 f of the page carries a current toward the bottom of the page. Whog wp.u fe6)+ zxb5nu3at is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires aa;bbw o*5n-zx 20 fjgzre placed side-by-side on a horizontal table. If the wg fbxzz;n 2 j5aobw-*0ires carry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizonta:e +v1h885wx dyccazjl table. If the wires carry current in oppositece zh+1:v8wdy8x5ca j directions,

  Consider two current-carrying circular loops. But7s ywg9f i1vao2z 4l t+z6k/oth are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field a26 lzf9ows tt4y1a v+ gik7/zut 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 okdq6tb*1nx .sf wire and both carry the same current, but one has twice the r*b.t n 1ksx6qdadius 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)k hec +;do.vdb-n7 ,wxzqla : current carrying loop occurs when the angle between the loop's magnetic moment and the magnetic field vector i vkh x:c, -7)zbeal+wo dd;nq.s

  When placed askew in a magnetic field, a current cart15qp q2z2 jbvoqpem/ 3pf5j7rying loop that is free to rotate in 2p2p7q3o /vj q1 qef 5bzj5ptmany direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation qst.f( 25zxpl khvfxexw (59.of essentially all electric motorsz. w9qx5(ftxsklf5x ( p.evh2 ?

  A circular wire loop lies in a horizontal planr0vxjilv3)2dp7sgp* v tad40g b6c2de on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magn td vid*2bg6xvglvj scad30 4r0p)72 petic 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 particle of :qwb 0ub7ac98j:+ysl fte7rzs v 0,dzmass m and charge q is accelerated through a potential diff 7: jtq,bzryvus8e+wb 0 7l 0dsfa9z:cerence 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 crossed v 8jee0db36nev+ iul. 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 the magnetic field is dirvenijdulbe+03v. 68 e ected to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parag x-aa2a5j0w*dsjqn 9 yay u85llel to a uniform magnet5gjadwan82 5 09j*yuxaqay-s ic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dijhd;1)ne-(gah:fi)ydd ; zlsrection 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 qsjc u6 tcggc e1(-pl78- n.k3:gyshs a straight wire carrying 5.0 A when it is placed in a magnetic fielc(.slh7qy s 8-cs1n3g-e:j pg 6ckgtud of 0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.00qm:h 0lu*q8 k+fpnjy m long has a mass 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 magne q:pq0h8kn+ufy*m0j ltic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. Whatufct 0*xv 11hh0.zpi0j2iu iy is the magnitivzxi0* hjp 2. h0y0c1iftu1 uude of the 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 s9,. gjt jwyjs.peed 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 sp5(c y6jode-q pa3eq) s zk7r3cr*0deweed 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 speed h-+)vkxpafdalc9 z: 7 $4.0 \times 10^5 \; m/s$ 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 sp,swfzuxssr-/2q1 i7t eed 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 witjfyzd9z7 qw8+ h 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 acceleration of the electron.

  A proton has a speed o88 v db3jwyoo4f $3.0 \times 10^6 \; m/s$ 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 rzko9t 7fksr5; l(xd8 a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 oftkr 7(klxs ;9z 5d8rm from the wire?

  A high power line carrying 1000 A generates whjx u1p gte+ti0ea0rm5 0xq5u6at magnetic field at the ground, 10 uu0 iq 5t5 xm+ex16 trp0je0gam away?

  How much current mustf.1;bu;pc-jdz mu 9 vf 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 5h+7+ l vb fn;m6uhzmx5.0 A is the magnitude of the magnetic field due to the wire equal tmmu5xbfn 7;z+hh6+l vo the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires c 5zgs0bvpj;(atkx-p*-gey . d:a m-.9zwybazarry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic fiev:05z 9z.b*stajgpypmbw.eyza( ag- - d;-x kld 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 carry currents of 20 A and 5.0 A inpwd ed1*p 0;j,q+e, h ,xru0plb/bzpq opposite directions. The wires are separated by 0.20 m. What is the magnetic field midwp,qdppdeq ;l/+h r0wz,b*j ,ex 01pubay between the two wires?

  Two long parallel wires carry currents of 20 xd+qjyu .7 pj1A and 5.0 A in opposite directions. The wires adyx+jp7. qj1 ure separated 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 the5pt 0m zz12+rp3pu3 detl5p nm 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 magnetic field does one of the wi1ter5m5np ut3p0d p2zl mz+3pres experience due to the other wires?

  Two long parallel wires caroit cx,3ng s6 d7a2,- t;ntlwrry currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the mntsta3lcw x,; o6i2nd t,rg -7agnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of)y3 nz n1ttaw2 radius 4.0 cm when a currez2y t13nw nta)nt of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field is gqxn.6j v-hci fd:g/h bo/q2 n+9hl*bproduced at the center of the solenoid when a q/fobng2hbiqn*d h-vj chx+. g/ :69lcurrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carrie*jkfa:j8 vn p3v47xdis a current of 4.0 A. What strength of magnetic fp* x vj:ad vf84j7kn3iield will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm n.uy3c-huf 3flong to generate a 1.0-T magnetic field at the cen ucyff hu3-3n.ter?

  How many turns should a 10-cm long solenoid have if it is to 2a pqy:wp6-j7vl:81s2. m6lkzc 8qhud xcmmzgenerate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a re.*du.h a go2ajctangular loop of 120 turns that carries 6.0 A hd2 u*.o.aja gif its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fi7*,tvn(hi qa )lsw7uk dw-,i:hms o6ield of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque k76 ,id qvln soh m-tah7u(),w s:ii*wwhen the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional area*r ek66 0hrf;+w ui5xffddbj9 $0.12 \; m^{2}$ 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,:,bcm;e nn3kf hytjq2: c. ly a current of 2.0 A is in a magnetic field of 3.5 T. The loop has an area o:jq.c ke;mb n,y23fty cln:h, f $0.12 \; m^{2}$ 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 ug7 b vfr8 s1q8a0o xha/1s,qesa 02fluniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of tsusq0b 8f vlq0g a27s8fe har,1/ax 1ohe loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fielap32mm 7 y0ibvd of 0.30 T. The current in the loop is 2.0 A. What is the m70p2 v yambm3iagnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of ar:*j,uko kq rd- .6y1yxlci9kjea $0.25 \; m^{2}$ 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 cvqu 3(e5o ao1e) 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 velocityoygqp*z 1v, 2i $6.9 \times 10^6 \; m/s$ 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 poteta2z/tp53c1 1/gld5 wjt2fw zp dsd2fntial of 1.0 kV and then moves into a magnetic field of 0.040 /3wjgldt/1 2f d1 z2wzt ppf52a5cdtsT. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enj q(p8;w6cwthc1k1m 9rj acb .ters a magnetic field of 0.30 T oriented perpendicular to its directio jq( 6p1k.ch j9m;wc1c bw8ratn of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential di.6rnz+vt,pnc 5i asv 5fference of 10 kV before entering a velonv +apc.zrnv 655s,i tcity 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 undeflected?