If the north poles of two bar magnets 7 a0r9mb3 p,b.wtdtq hare brought close to each other, the magnets w .73,tba qtr9hmw 0bdpill

  If the south pole of one bar magnet is brought near the north pole oi iste9-4coo+ f a second bar magnet, the two magnets willc9soti4ie+ o -

  If a bar magnet is divit5nc2rasw/ /ju86bx8( ,pk nu g(enbrded into two equal pieces,

  The Earth's geographic North Pole.cl (nk15 mzud is magnetically a

  The south pole of a ma10 z1wa0p g8 u2sculvsgnet points toward the Earth's

  An electric current pro whhkjk5us/1 1duces

  Which of the following isperi6wj 4wf15 correct?

  A vertical wire carries a current straight dow3hg q x8h)z8swn. To the east of this wire, the magnetic field pointsw8h hx)3q8 gzs

  A horizontal wire carries a current straight toward you. From your yx -2espm9qhth26 u6a 1d )meppoint of view, the magnetic field e9qt 2ypdpxm -useha m612h)6caused by this current

  A current carrying loop of wire lies flat on a tmr.-9wef+wczwsz y/7b 3 er)ts .l2elable top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is c 2r)s / r-ze zty3.fl.e+9seb7wwmwlthe direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circulxp.v a -*tgz gjaag /, 6p;2h.8vqifmzar loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwi g6*,z pt/ a-hgq. vxf8;a.v ip2amjzgse 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 i ,ccfb41 x)kh)ap w( p/vu+ 9qtsizdn3s the

  1 T is equivalent tofw+ wa3 pbx:bc9(ypf s:m;eml) f9 +9rcvtdw 7

  The direction of the force on a current-carrying wire in a magnetic field i o6cv/9juywap/s zd r:* q1p/es described by which of thv 9q /ec 6z/ws1/j *doaprup:ye following?

  The force on a current-carrying wire in a magnetic field is the sg52cnr ol9fa;)sqvboe *w d :7trongest when

  The force on a current-carrying wn67jyw 5bt(qh -e r:fuire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a *ie+m vt 1, jbb*m u,bos:9(8 d4x,ywhvvhx wuregion where the magnetic field vector poi e ,mh si4w:vtvum9v1x8ox*hbud(j *ywb +,b,nts due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetis4l mni6 g+na /fn03chc force. From this we can conclude that na f3c l0i4/ngsnh6m+

  A charged particle moves with a constant speed throu)bedw ooz/.2sg3 xoj -2l)srdgh a region where a uniform magnetic field is)/2b)sgx.ow 3lrs d e2 jz-odo 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 a5pdsnmzheg *y- m1j 7-cross a constant magnetic field. The magnetic force on this pj -5 hmn ys*z1epgm7d-article

  A charged particle is injected into aykbn k),f9 mo/;vza -f uniform magnetic field such that its velocity vector is perpendicular to the magnetic field v)maby,f k vo-/kfz ;n9ector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path lay em) q7qf+jvkc5::in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the7)ykqq :ej+av mf :5cl circular path would be

  A particle carrying a charg: 5v(v q-ohqfee of +e travels in a circular path in a uniform magnetic field. If instead the particle carq v-ehv:f(qo5 ried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastwar7f gf-i/jm)zwd s8j*at0 8mr rd at speed V in a uniform magnetic field that is directed straight downward. The magnetic forceg mwj/sm8z8 d0t*r) rifa-7fj that acts on it is

  An electron has an initial velocity to the south bmrt9ho+l1h unjmc/ u;bp/p19ut is observed to curve upward as t/cp tmnu+jhrolu9; / m91 1pbhhe result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters :irkb.f r; t+sa region where there is a uniform magnetic field in the +y direction. What is the direction of the magnr s +kirb;.tf:etic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field pro+tpk4)a :q xsw4e+e.nzqe ub. duced by a long straight current-carrying wire is

  At double the distance from aktkg:w(+q f5z rn tlonok; :*+ long current-carrying wire, the strength of the magnetic field produced by n(ko:;tnkfg +lt+wk *z :o qr5that wire decreases to

  Two long parallel wires placed side-by-side on a horizontalx qh5z8 c,zde; table carry identical size currents in opposite directions. The wire on your right ca5d z;ehcqzx 8,rries current toward you, and the wire on 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-by-side on a horizontal table carry ijyi0thk v )(9hdentica0)j (thvyh9ikl current straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equalp-53ns gs f*uf currents. The magnitude of the force between the wires is F. The current in each wire is now donusgs3 -f5 pf*ubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves5iq)qub3i 0;kwi vz +q toward the east alongside and just south of the wire. iqv5 b3;qk0zqiwu i+) What is the direction of the force on the proton?

  A wire lying in the plane of the cc*7,lmhyb93wz djg2gz/ n d;page carries a current toward the bottom of the *,by/zz wjlc27;3m9dhgcd n gpage. What 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 a*qtnh;9rrl i;0yo (nvre placed side-by-side on a horizontal table. If the wires carry current in the same diov r;nq ri0hy*n (;l9trection,

  Two long parallel wires are placed side-by-side on a horizontal tablefyzu 2szjyr1, ,rjea8*252 u axjjeo4bfq w6+. If the wires carry current in opposite diu25,w ybrujr82yx 2 oe*z 6,ajje 1szq f4f+ajrections,

  Consider two current-carry gv i p.d+mwn )ebbty:;/a9k4ging circular loops. Both 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 at the center of the smaller loop, the magnetic field at the centeradg vtbki 9;+pyb:nw)/.4egm of the larger loop is

  Consider two current-carrying circular loops. Both are made from one strjqww 4qu):xdwu- ll 7)and of wire and 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 momentlwql7)j : w)qwxud- u4 of the larger loop is

  The maximum torque on a current carrxdba wxf8 q 9w z4)0+nao*ig8aying loop occurs when the angle between the loop's magnetic moment and the magnetic field vector a9 da0o *z4nqiwfx xabgw8+)8is

  When placed askew in a magnetic field, a currentf r5j gakse)/b/1 epsu *:yp4e carrying loop that is free to rotate in any direction will experience a torque u g /kf*brsjeae :/)4psue51pyntil its magnetic moment vector

  What fundamental fact underlies the operation of q vacg-d 1i9j*essentially all electric motorsd c9*ij-av1q g?

  A circular wire loop lies in a horizontal plane on a table and casv ;qs/gmt9,,f(4opk c ,,tbr ewn /uurries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north bs,trpn9gv;ct,4/ku ,s f o(, u/wmqeand 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 mass m and charge q ipghp l..0jgi 3h2(q dvs 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 uniforpd qghj0. 3p( gihl2.vm 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 throu r(tsx2;kzt7 jgh crossed 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 directed to the north. What direction;7stjxkztr (2 should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A i2 qar(aitq+d x 8ck(-as oriented parallel to a uniform magnda82rqq ((at a+-i kcxetic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curr 5gs4ad i5-y9zq exl9: b7nxfrent 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 A wh6)3xq wh3 ci iigw,yx+en it is placed in a magnetic field of 0.020 T? The wire makes an angy6x,ih3 q ic+3x)igw wle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long h)sk(f-s,7+ )yp nuxbe uoymu3as a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimu+b sfs3 7m,y)eunp)uy -k uxo(m 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 uniform magnetic field of/h . p dthkfj.w2ltx7+ 0.20 T. What is the magnitude of the magnetic force on the proton?dttj7.hfk.lxhp+ 2 w /

  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 spz1krzc d/+d fy qt2v45eed 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 speed ow swgif -6r+*g ofsk5: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 spsny w2soc8, els) r//yy4 ,hxzeed $4.0 \times 10^5 \; m/s$ 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 speyfl +vuya8mil rfm c7e /;o3 k.sf9a(p+3izy3ed 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 speef2 b4lz w ++onxpqm85sd 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 speedk my u-12wu zp(+;uyhs of $3.0 \times 10^6 \; m/s$ 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 kaof7kw2 2/z8 jydl0q is the magnitude of the magnetic field at a diodyjf 20qz2/kw al k78stance of 0.15 m from the wire?

  A high power line carrying rf mtmo 29krfna08 19o1000 A generates what magnetic field at the ground, 10 m awa0om t2mr8k 1a9r9fnofy?

  How much current must flow fc h yxg(jjuemlujxn./2+ g 3v25j42o vor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a 7edp +ljwsy0r1e-mi ,;bz:6vyo+phv long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of thevyw07er eso: lp-+d1zyjb mv,6 ;pih+ Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directv:stp u)6 1lcdions. They are separated by 40 cm. What is the ma1v l:ud)ps6t cgnetic 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 carry currents of 20 A an+u5( :t gchvyvd 5.0 A in opposite directions. The wires are separated by 0c+huvt5 :vg(y .20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 )/ ed;3c;d/ae phjbk yA 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 sj);e/cdheay bp k /3;dame?

  Four long parallel wires each carry 2.0 A in tuos : .v0+cpdxhe same direction. They are parallel to the z-axis,.ouvxd0c: ps + 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 wires experience due to the other wires?

  Two long parallel wires carry x * vw/svd7:n9ss9gi g0eko u(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 wiresdvs9g kiv*ew xn0s7 :uso g9/(.

  What is the magnetic field at the center of a circular loop of w2uens*li3idz7 a c9ph6 pq.:iire of radius 4.0 cm when a current of 2.0 A flows in tquh7i9p pc 3 2dine6s*:l.a izhe wire?

  A solenoid 20 cm long is wound with 5000 turns ofc:+ c;w 6tgjuv wire. What magnetic field is prov gw;c:ujt 6c+duced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carripi1k8v00ug cg9xg -hmo6 h l4kes a current of 4.0 A. What str9hp41gk6 0gcvm0uok lgxh8i-ength of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to f:u0zniwpjj5r d(e 1-generate a 1.0-T magnetic field at the:duw 05 efj pn-zr1ji( center?

  How many turns should a 10-cm long sol cfb)-6hyz1qb jzoa: d8d2no3 enoid 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 rectangular loop o;;:dkw,ie wtatl+ f4 3 tz4ywzf 120 turns that carries 6.0 A if its dimensions are d:4iwfwwy;;ttlz, e +k4 azt 34.0 cm x 8.0 cm?

  A circular loop of wire of radius 9f b3bn)sejnj70ljpis6up 110.50 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 thb3p0 j)nj9bej n7s ls16i fp1ue plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional ars8vi(tjwld;j. /5v jcea $0.12 \; m^{2}$ 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 oyyz:. at/u5h -d3cmiA is in a magnetic field of 3.5 T. The loop hmiy/zud:3toac h5 -. yas 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 radiusqg mu;2 ie 5n9 fw)i*bjnj:5ed:j:cck 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 whc:2cj5:d9j nfijn: ;be 5*w i)uegq mken the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a +w .nzs1l6 2royi-xrfoycw:-uniform magnetic field of 0.30 T. The curre : f6-o2r-i+ .yrc wynowzlsx1nt 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 wire loop of are,)5xp1jwujncgoa-pd .4eqk 6a $0.25 \; m^{2}$ 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,86 mab.:u chw1v95j8 bamgle x a single-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 with velocitj t arx)l.r/80(gg:*nryhwv py $6.9 \times 10^6 \; m/s$ 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 throz :,j *7v gre2n8esdqough a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What iseqnr7zjg,os* e 8:d2v the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a mag/-b utt skbv-/netic field of 0.30 T oriented pebu/s-/b-kt vtrpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference c-m wnd mz6yfz1a2 gzl ,ke4;3of 10 kV before entering a velocity selector. If the B-field of the velocity sefy ;m-kz6 zd1wc4zn,e 2la3mglector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?