If the north poles of two bar magnets are brought close to each other, the magnz, gzvwt4 w eeg,d)n3i/-lg;zete ,/g4zvg-wwz il,nd3;tzeg) s will

  If the south pole of one bar magnet is brought lep.vjt :v5/36i6y jt yp3d dgnear the north pole of a second bar magnet, the two vvjd5yt3:.g/p3di tlpy j6e6magnets will

  If a bar magnet is divided into two e7,sf 9ufu t6f:kj(au,r slwd,qual pieces,

  The Earth's geographi oiqls- hq45e+c North Pole is magnetically a

  The south pole of a magnet p1:dxfr;qaefq- rr g0*oints toward the Earth's

  An electric current pyy0 y5 zrhay ubnux,*r.2c s6b.l tvasj3. 5n1roduces

  Which of the followin-i ia2g 2.5dk.*yzistk igpe 9g is correct?

  A vertical wire carries a ck sfsx,( r/(n8yjmr:eurrent straight down. To the east of this wire, the magnref: /yr(jm sks(xn8,etic field points

  A horizontal wire carries a current straight towa )1c2fp 8,nmonmldh 8erd you. From your point of view, the magnetic field c) hmndplo2, 1cf8en8maused by this current

  A current carrying loop of wire lieshyk o38r/a*lkqbqjw5 .v;(rm 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, outside wob kqqjh5 ;/y( rl.*am3vk r8the loop? The magnetic field

  A current carrying circular loop of-jpj*sb7aqs:3y,nt z .lh gy0 wire lies flat on a table top. When viewed from above, the current moves around the loop in a coua7j. 0qy,sbgz: nljp-s t*3hynterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic b49lg/om(5b4wk)dp16gwf mzypkg1.p ao x h4 field is the

  1 T is equivalent to ,agnfeanr68( cx5zh29tid, g

  The direction of the force on a current-carryingwv1;9oho9mx smnd)0n wire in a magnetic field is described by which of the m h0nn1);vxwo9d m9sofollowing?

  The force on a current-carrying wire p)xh m-,da8s/x f(9 tn mbewk9in a magnetic field is the strongest when

  The force on a currenynhns- n,2inpx*6 2 pst-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up laehh u;f erl8 *82:rsin a region where the magnetic field vector poine8h;:h8fe*lrr slau 2ts due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. z13d)uj- sdaw From this we can concludead)u-swj z d31 that

  A charged particle moves with a constant speed through a 53re oac9*pv s4z(bgdregion where a uniform magnetic field is present. If the magnetic field points sre 9(dap govcs3z*54 btraight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnu s8 5/4cqeixketic force on thiq c8u/k5is4x es particle

  A charged particle is injected into a uniform magnetic field such that its v8 +m)j s8.:wmyh:qol hchyia)elocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle wiljiahy whm m:cs)hq :y88.l+) ol

  A charged particle is observed traveling in a circule5262cs3dq ,tmlyirva to6 0ro wh9g q0l 7i/lar path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would5c qg07tvyot9lma2ilre2h ir3w ,6 /osdq60 l be

  A particle carrying a charge of +e travels in a circular path in wn.2eul uv5u e/;d,cta uniform magnetic field. If instead the particle carried a charge ofunwe/t, uce2v l .u;5d +2e, the radius of the circular path would have been

  At a particular instant+lqc5rhlfb g09adgd (2so)-x, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force thao(cdgql bag5x2+) - 0sdlr 9hft acts on it is

  An electron has an initial velocityu/--gqozq-q. x4 7wgms qlej u8( zp6i to the south but is observed to curve upward as the result of a melg4- mp w.sqq(6iuq qzu/x87-z-jo gagnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enterh,7s g9r *p) fyntoamwp+b/ 0ks a region where there is a uniform magnetic field in the hf,0w+grm s t a7/kb)n9p* opy+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 stru/ hyqf8 ia/h;aight current-carrying wire is

  At double the distance from a long current-carrying wire, the st/hpqtn5 z):n5 onwi0zhp n).rrength of the magnetic field produced by that wire decrno:rh.wnzn q)hp t /5)i 5nzp0eases to

  Two long parallel wires placed side-by6m/do22gc+6svzie )jbkqr 3 p (ut/jg-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, theo26ijprsggb)6+ qcedtjz32 kvu m/ ( / magnetic field at the point exactly midway between the two wires

  Two long parallel wires placeds i0 2nzk3t*py side-by-side on a horizontal table carry identical current straight toward you.i*ysz2tk 3n 0p From 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 fkmzne ,hv06i*xg+4rwf7 k1b0qnx 5 y aorce between the wires is F. The current in each wire is now doubled. What is the magnitude of t*w+0 fabn7kg0k,mn6x5 ixh e4v1yzrq he new force between the two wires?

  A long straight wire carries current toward the east. A proton moves tow6dn/1q5 tscditu( 05dbff 1qiard the east alond 510dd/qts(n5fc i 1ftqui6b gside and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the planenr(p2(k0;obq; nh l qo of the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on a 0n;lrh q qpbn;(o2o(kn electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a hory.gd,y;cj (q 5*f8r8f-0o qg expkj rgizontal table. If the wires carry current ijxk(;qfr ,yrggjpo8f-*q5g. edy0 8cn the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the m1.bedfy;sz m jup)f7+ m1l)6o rru8w wires carry current in oppplobmd)yrm s18ju+.;e1 z fr6fuw7m) osite directions,

  Consider two current-carrying circular loops. Both are made fh i:bm4cxpld1)-0ak; 7anmrc rom one strand of wire and both carry the same x7lad)ck -m0rn chb14ipm;a: 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 center of the larger loop is

  Consider two current-carrying circular loops. Both are made f2v8;cg lavy5kgt)c);u. qh xxrom one strand of wire and both carry th2 )kluc5tcv;. xav xg g;hq)y8e 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 occ7 jr4fbsmbb8a.,j q,x urs when the angle between the loop'rsm,j7f j,a4qbb 8x.bs magnetic moment and the magnetic field vector is

  When placed askew in ag x8 ec*msft9escne.r*k )k8. g up5p2y/gwc 3 magnetic field, a current carrying loop that is free to rotate in any direction wie8g cf/g9p2n. mke3c*yseg)*k .s 8r5 ut xwcpll experience a torque until its magnetic moment vector

  What fundamental fact underlies the operatio v .t;n8 cc4hhp))cjndn of essentially all electric motors?n p h)8. dct;hj4ccn)v

  A circular wire loop lies in a horizontal plane on a tiff47k 7,w (kz, fehijable 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 t (f,7fhwie7,ik fk 4zjends 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 ab+;l k5b7owsxt0 opf 0ccelerated 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 th;0bkstpwl0 f5+ bx7 ooe particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a sa(k;0 h ke-xv36 bcnjmh8qu /charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain vkhuh(qj 3va/n 6;m0xkes8 -cbelocity 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-/2ypf)r0uzkdbt i)u (lsaq 8 current of 0.60 A is oriented parallel to a uniform magnetic field zi)dfk y-2) lrqp /bu08utsa (of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a currenej4atf6 j3,yz j: (3/lxpwi5dzd mj )st of 10 A in 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 y p xonl)h8nd:bn97r* A when it is placed in a magnetic field of 0.020 T? The wire p:nx7d9bonhyn ) l *r8makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m lib8v:u u9kmto /onw rt80i dzal5/0, kong 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 magnetic force to cancel the weight of thek90in 0 t5:bl zou8r 8w//vatuk,mdio rod?

  A stationary proton iw 94x6dq2 prlts in a uniform magnetic field of 0.20 T. What is the magnitude of the q4xldtr6pw 2 9magnetic 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 speed of. 9mfr4*qkowey ;m7gg $5.0 \times 10^4 \; m/s$ 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 speei9qv d;l swodr 9ce;94sc5kc ul6.gy 9d 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 spemqe px) 2pyi4 s,65yuyed $4.0 \times 10^5 \; m/s$ 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 u*b2ognn; r0f$8.0 \times 10^6 \; m/s$ 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 spe *rwh q*)cwhggp( 5m*aed 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 ob s6ryd/ik 79hafq( cnjvy7 .(f $3.0 \times 10^6 \; m/s$ 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. What is the magni5j8 ,xpgzla k/my8jo 6tude of the magnetic field at a distance of 0.j5 px8,8zljkym oga /615 m from the wire?

  A high power line carrying 1000 A generateld5 6ul4yrlab,lic9 . s what magnetic field at the ground, 10 m a 4 ilca6 l,rldubl5.y9way?

  How much current must flow fe- 4egtju)fl ae p9yu;1 2z2ktor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire cgfq e+;1c q:waarrying a current of 5.0 A is the magnitude of the magne1 :qq aw;f+gcetic 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 :a *i)hdk2gqj1zl;r mdh /)bf currents of 10 A in 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 wire and 60 cm from the oth :hkh)jgq;m/db)r z1i*fla2 der?

  Two long parallel wires carry currents of 20 A and2sv3mh7;g c )aab xqq:95oeou 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midwayoqebx;5m 37 caa:gv9hu o)2q s between the two wires?

  Two long parallel wires carry currents of kr/-) srty x-w20 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 from the two wires the samerxtk-yws/ )-r ?

  Four long parallel wires each carry 2.0 A in the same directaxe o)n5t1of;j3 zo+pion. They are parallel to the z-axis, and they pxne+t jaof z31;oo 5)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 c8s ehz5k+b 7szarry currents of 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 between the two wire7szsz+b58k hes.

  What is the magnetic field at the center of a circular loop of wir yixb) 9l20tmte of radius 4.0 cm tm 09yxbti2) lwhen a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field io:sby*ie0duf:7 r14gmxte6es produced at the center of the solenoid when a current of 10 A flbt:f e*sx64e1 umge 7dyr0io :ows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A1x7zb6 04(8pb xtzje xco/ ae,/pji tp. What strength 0 e(btxzpjp/x6 t41aico87 pxj e/z,b of magnetic field will it have at its center?

  How much current must pass throua 7v9+amc0tb;a swix65m r4zegh a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic6e zm795six4;a wvra0tba+c m field at the center?

  How many turns should a 10-cm long solenoidmwd74jk(dva5+f*qro,p l5 ir; 6f cb7l z h;ic 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 moment of a rect cbdd-y5*xk,kp 0e cx0angular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 -0k*bpk,5cx0ddxc y ecm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic 4b/,b vygtr7dw* m .vvfield of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the pb/vrg 4vwm v *.t7bdy,lane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectio9:qx 9e:jta kf+ik3qonal 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 currenly*xz3aaub1 rg6,p) mw 5 z9syt of 2.0 A is in a magnetic field of 3.5 T. The loop pz u9 *)ga5,61yx sywbm3z rlahas 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.rrz hx5j:ew5v3.xrs(3j l.l u50 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 pla ux.ehrj vjl( xzsw553rr.:l3ne of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 06t zpn- ltq+0t.mhy6h .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 t+ hm 6tqthlny6pt.z0- orque when the plane of the loop is parallel to the magnetic field?

  A circular wire loopkr(gaaxy c0b.t3s+e.t 9m x/ v 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 single-c5oy7 zlre icg o,*ne09harged 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 wi o y 8y*: byz0 fj32-d.ur.bhfhigwa5vth 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 aos* k;goq l(s7 pl38wr potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resu7qwl*r o3sl;o(sgpk 8 lting orbit?

  A proton is accelerated from recvm;ab 7f 96pkwg4i hev z279qst through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine t b4 qfk7h; cvgeiz6p2vw799amhe radius of the path it follows.

  A beam of electrons is accelerated through a potential diamg*av1 s8fsj.n55 rri apd * 5j*nl;ifference of 10 kV before entering a velocity selector.n.*gfsj*vjin aspdr; 558i1a*5ralm 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?