If the north poles of two bar magnets 8c;wsxcs nyui 8*e-e2are brought close to each other, the magne8su wy-c82exs;*nce i ts will

  If the south pole of one bar magnet is brought near the north pol-4g ,9js877ynrn 6xcrh5yji h v6c7pgp,rmuge of a second bar magnet, the two mcv,g hgm r6675i4hxy 9pynj-j8rpn rgs7u,7cagnets will

  If a bar magnet is divided i kjp(0+xw;xvck0/t ry nto two equal pieces,

  The Earth's geographic Noqby *: het4ef 1gtw3c4rth Pole is magnetically a

  The south pole of a magnet points toward the0tt5fbe 95p:ctt9zyx+ *r eq q Earth's

  An electric current protu9wcatf s8ht(4j + g;s 7f7vyduces

  Which of the following is correctoe /mwi4 lvvaovc :,.*?

  A vertical wire carries a c nxmpd tba1exe..86-x :eztf4urrent straight down. To the east of this wire, the magnetic field pa-:txt mepnzbde68f 1x4e.x . oints

  A horizontal wire carries a curr 4g110zc 9q flexb)rfrent straight toward you. From your point of view, the magnetic field cafr9e1q)c l41gzbr f x0used by this current

  A current carrying loop of wire lies flat on a table top. When viewed from ev9n;w7l b7f .:qvrcqabove, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by thbe v7cql.q; 7v9wn:r fis current, outside the loop? The magnetic field

  A current carrying circular lb3bt+o; f1qyg oop 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 by this current, inside the loop? The mag1+ f;bgtq 3obynetic field

  The SI unit of magnetic field is th jt pag0/gr tc-s/+d6 :tcuw)ge

  1 T is equivalent tolueqn ln9v2( :

  The direction of the force on a current-carrying wk6p9nq p9;8vsz vmy0,l7raxk ire in a magnetic field is described by whickqv96ka;y , 0mpxzv89s7 prnlh of the following?

  The force on a current-carrying wire in a magnetic field is the strongestlusmd *xn2 h6lw.pa7wj4u3l 1 a1+scz when

  The force on a current-carrying wirez0vfrr09u7 uwy ez/ p) in a magnetic field is equal to zero when

  A vertical wire carries a current straig68,a mu lg4zjtht up in a region where the magnetic field vector points due north. What is the direction of the resulting force on this currentzg m,6j4 lut8a?

  A charged particle moves and experiences no magnetic force.hhwqs a3/z6o3u 1u.xe From this we can conclude thatow/z ha6uhx 3ueq13 s.

  A charged particle moves with a constant speed through a r3 bgbjd ,c6d((3hboj megion where a uniform magnetic field is present. If the magnetic field points st b,oh3jm3j((dd bc6gbraight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. Thejhxl*+2lzf 1y magnetic force on this part*l+l yfxj21 hzicle

  A charged particle is injectaw8 i;ywnm j m5o 4;a0**jqaiwed into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle wiwa0awmyq ;j;oi ma 8*njw4*i 5ll

  A charged particle is observed traveling in a circular path in a unifc ,s-edb3 d)dworm magnetic field. If e-dd)sb,cdw3 the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a chdgvp vj1*- j4 b8tdgg)75ngq zarge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would hav158gqzpjv*gd4 -bggdt vj)7n e been

  At a particular instant, an electron moves eastward at speed V in*tmj091fxv5 hq/l z na a uniform magnf/lmn0zv 9 t5j 1qax*hetic field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observy*80evryrj rk7gs4uy c+b87yae p b+zjl)9;med to curve upward as the result of a magnetic field. y yrjypukjg zrra0ve 9 e 8l8bc+b+s7m;)74y *The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there6kwx. pf0b1m j is a uniform magnetif0m6 j1 wpkb.xc 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 straigqrx/:p/wymv3xb4qp3) q u * wvht current-carrying wire is

  At double the distance from a long current-carrying wire, the strength( ldlso4q k)p6 of the magnetic field produced by that s )kl(o4dp q6lwire decreases to

  Two long parallel wires placed si.aj4e a2qiv 2yde-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 onva 2jia q24ey. 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 wy1me)7+ xody-by-side on a horizontal table carry identical current straight toward you. From your point xwmy1)d ye+7oof view, the magnetic field at the point exactly between the two wires

  Two long parallel wires rlbz,gzhw1u ; z;an 0a6csgyl7kd4qs 00(hq9 carry equal currents. The magnitude of the force between the wires is F. The current in each wire isz0 rhds (acya10gsqzl g ;0; bz9uwkn4h 6ql,7 now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward theu(:jzhq+ mg 9xd )hxvhao0/pi6 4cn) r east. A proton moves toward the east along)p+ g:0d uhm ziqhx9o6 crj4x/ hva(n)side and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carkumta/yd n n2s 32:)jlc-szv7 ries a current toward the bottom of the page. What is the direction of the magnetic force it pro lnss u23jday: /c-2m7kn vzt)duces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are plac;ie.dg xruv, p.zexmg4gb:4co/6 0 cbed side-by-side on a horizontal table. If the wires carry current.:mocg0 ,z .6e4bcdb / ix;urgxgvpe4 in the same direction,

  Two long parallel wires ari u)d0 /bx0y5 xrjagbxzx::,ye placed side-by-side on a horizontal table. If the wirej): xiyau:b5bd ,z0r/ 0 yxxxgs carry current in opposite directions,

  Consider two current-carrying circular loog6yhj tpudq3gvyg3k29+i (j8ps. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared t2h(gt v u833+9 jgpdkyjygqi6o 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 lo w7 81)o3,kforvhtk jnops. Both are made from one strand of wire a7o j8)wk kr3ov n,tf1hnd 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 of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle between b75rvs,upnwge :5 :outhe loop's magnetic moment and the magnetic field vectore g5ru:v,op n5:us7b w is

  When placed askew in a magnetic field, a currm h1z/eqog1f 2ent carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment vecto m2zef1/hq g1or

  What fundamental fact underlies the operation of essentially all electric +g5ioyrn8w7 hzb i5bi ohr6-a z7qu39motors?57+ h6qzb7iriyn3agi-ohb8 or 95wu z

  A circular wire loop lies in a horizontal plane on a table and caw6lc((0;jvg saw)xoc rries 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 sixs0lvcw6go((ca) j w ;de 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 and charge q is accelerat .ehj(,irb)ail3dme3oug.p 4 ed 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 partige( ijo.4el dpr .,3ai3ubm h)cle in terms of B, q, V, and R.

  A velocity selector cons)v1*an1ctdc 01atd sgists of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a cert*t1cv1t 0 saaddn) gc1ain 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 parallel to a u uf 25uefqys u2my.;o/fuqi9 2niform magnetic fiel q9/ 2uiyu.f2fso5;fqm y2uu ed of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of n;k82cbudx tvt imy1v)1iv;7$30^{\circ}$ 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*/eosg913q q c6bin wo carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The w gq1n *eq6o3ibws9co /ire 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 magnetic0zc,rte7gwz0/ g; cf r field of 0.10 T. What minimum current in the rod is needed in order for /t0r0, fcerg7wzg ;cz the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of7oubtllmg :, (p/0qvp 0.20 T. What is the magnitude of the magnetic force on the proto/: gpl7v(l qmb,up 0otn?

  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 withv(s otzck- *. yz.0mrm a speed 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 s 0/)(qwr+gv.g:+zcun2tndx sd n m1 lcpeed 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 d3cd4i mxe) -a2n2oyjjdr9p;a ue 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 sp tvdr:**(b tokeed 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-t;8 oib,1 kgk/zs sut 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 of 4u0x0 ns 2 tfxbg()dnu$3.0 \times 10^6 \; m/s$ 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 jb1zjbkc: 8.fpb :4al .kms j5wire carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from th: l5sam .z.p k1jf:4 8bjbckjbe wire?

  A high power line carrying 1000 A generates what magnetic field at the,eg )+h yzo,uzz3gp 2hv)2nqn ground, 10 m away2)z) 2uzhnq3g gpo y,hvnze ,+?

  How much current must flo t9e7(f -msmbaw 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 wir.ezt5 r( ,bvk(v3x mvsf-yx*we carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magntzvkw* (.rmsx e3,v xby-v5f (etic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A *8v*lp9ys7sr p+iu ji:xn( ixin opposite directions. 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 rp9y*8 jx*+s :l (iuiin psxv7wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direction ) v:rtrq;9hcjs. The wires are separated by 0.20 m. What is the magnetic field midway between the two wiqvcj)ht 9rr; :res?

  Two long parallel wires carry currtpj n:l hjwizf7)7(y *..h) pbqs8wxients of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions frf:) i 8)7h sx.h jqpw.j(w zy7bptlin*om the two wires the same?

  Four long parallel wires each carry 2.0 Apb*;xbc6c . hfgt* olp-y(qf3 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 magnetic fbcfhg**x.6( l-cqytf;p 3bpoield 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 ono hv;7db( ev*:g/lrypposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit l:lh*(yb ;7nervd g/ ovength between the two wires.

  What is the magnetic fielj 5 )hieay27xx6rq . 5,xg,epmvb rk(dd at the center of a circular loop of wire of radius 4.0 cmrkdeqg6 2ibr7 p)y,e xa5jxvm5 xh. ,( when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of f;;q:+uz, sy-z 6e4hig 1v hmdg+hy qgwire. What magnetic field is produced h q1h+i;e+gg h z-qzvm4u6ydgs :, yf;at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m0i3 aum7gm9 fx long and carries a current of 4.0 A. What strength of magnetic field will it have at7g39 0xmmiu fa its center?

  How much current must k19wpdok dc 9hq6h12apass through a 400 turn coil 4.0 cm long to generate a 1.0-hddo9h 916ka qkpc1 2wT magnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to geze se;c5jy833tiods s,k z.t 6nmg.7ynerate 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 1x84irqre ;f2aur21cze - k.zqld lf +,20 turns that carries 6.0 rd4 xi.;qkqz +8l2fz-f,e r a21ecurlA if its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wirew(,l m0zs mt+c of radius 0.50 m is in a uniform magnetic field of 0.30 T. The currenmw ltsc(0+m,z t in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional areasv:u- ysr 4)nl (hnfyh 2hp 0h4:uf:wq $0.12 \; m^{2}$ 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 magnetic fihtx/ mzh1*6nw4xlc j9v vi4p; eld of 3.5 T. The loop has an area of ;/x n* cp 9m4z4vhjix wv61tlh$0.12 \; m^{2}$ 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.cir me( p3 9h,:ob7udq50 m is in a uniform magnetic field of 0.30 T. Tuo7peq bimr(9hc3 ,:dhe current in the 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 0a7s2- 7a mt.q0elwmtu.30 T. The current in the loop is 2.0 A. What is the magnetic torque when t mtm.0 eq7w -auls2at7he plane of the loop is parallel to the magnetic field?

  A circular wire loop of a,a0eovaf 44xcxx h-(wrea $0.25 \; m^{2}$ 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 spe os;.d+qvz hzyp8;geod+ l1/ ded 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 wit oe9dy; rj(e-zh 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 3n, y lqwm*bvj2u*cl80 crc;qof 1.0 kV and then moves into a magnetic field of 0.040 0cwu2vj;llrq *cqcmb,y83 * nT. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a ma s/34,qlm-j(yi bxdrwgnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it lqrsi(-mwjx/3yd4b , follows.

  A beam of electrons is accelera840dl h ;*-eea dem4 xwpml(gqted through a potential difference of 10 kV before entering a velocity selector. Ipw leadgh 0(x4-l*;mme48qdef 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?