If the north poles of two bar magnets are brought close to each other, the mac hw8hh4f6c0wfx ::7 4hnr rpxgnets 70crrh:x6ff hh4 n wc4:8hwxpwill

  If the south pole of o0dri*;x fojl)5b:ac -s ro7done bar magnet is brought near the north pole of a second bar magne5jrboo):l0cs- ;or7*di xfad t, the two magnets will

  If a bar magnet is divided mhfnig 31 pf1t 0 *sl)/yh lx7lbvp6q7into two equal pieces,

  The Earth's geographic North Pole:6i63cuq qi qf is magnetically a

  The south pole of a magnet points toward , venmq x(p9l9,qq :px; s7jkpthe Earth's

  An electric current p2zk)v9yx4 pnbroduces

  Which of the following is corr) oqs)m yldk46ect?

  A vertical wire carries 1u s:gfc hv;a fndv)/4a current straight down. To the east of this wire, the mg:/d na1;h uv)svc f4fagnetic field points

  A horizontal wire carries a current straight tiw /0 +m59pui(gwzvoboward you. From your point of view, th5/0gpwi9viwuo+z (b me magnetic field caused by this current

  A current carrying loop of wire lies flat on a table .xnc6vc z7+,z s- u,ipxgxqn 6top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetizxgqcxcn6 x-i, p+zs7, n.uv6c field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wirq7 )fdsf qtrpz2fe( 56e 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?(ep2fdff6qr ) 7z5 stq The magnetic field

  The SI unit of magneqam8.je kl6e *tic field is the

  1 T is equivalent toa.gzq1xg 1 np )nng2nyg )i0y7

  The direction of the force on a curren)h)+neu*s 9 be hmc.ent-carrying wire in a magnetic field is described by wh+c nmbe )s )he*nh9.ueich of the following?

  The force on a current-carrying wire in a magnetic field is the str-o09zg( q 66gq h; l wzmqicmiaqy+kpp.).k3longest when

  The force on a current-carrying wire in a magnetic field is equal to zeryiaz/5k3f (s *k /lynco when

  A vertical wire carries a current straight up in a regeq pqwx *l954yqrlb )3ghwh,:i:. kption where the magnetic field vector points due north. What is the direction of the resulting fewq x w)9gkq.rp :hl 34h ypbt,:l5*iqorce on this current?

  A charged particle moves and experienzq qlcw7g7 0y*ces no magnetic force. From this we can conclude 0w7c g l7*qzqythat

  A charged particle moves with a constant speed through a region wylm9j.3urkcdykh 8,r hi*f+ugf +f; 13zb 0ehhere a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximykd,+ yh+;9e1hl h 3f8f c kufb rz3*rjig.m0uum when the particle moves

  A charged particle moves across a constant magnetwh5d+ r whpc)(ic field. The magnetic force on this particlhcr +5w hpdw()e

  A charged particle is injected into a uniform magnetic field such that id .r 0y)8tcpnq(j o0buxkw45k ts velocity vector is perpendicular to the magnetic field vector. Ignoring the particle05rykj8p)(.tw 4xd oc ub0nkq's weight, the particle will

  A charged particle is ofk2bfo h4kav 4 8,y zock-,u*ybserved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of tb fkkv*ukoao2h4 y8c,,4 f-yzhe circular path would be

  A particle carrying a charge of +e towz7 do n7a5s6ravels in a circular path in a uniform magnetic field. 7w5s6 z7nadoo If instead the particle 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 in a unifmq. rig7);rui-tdexn u iu)7 3orm magnetic field that is directed straight downward. Th- xi u)um7e qnr t)i.dg7r;u3ie magnetic force that acts on it is

  An electron has an initial velocitpew m-b1pdp. 8y to the south but is observed to curve upward as the res bem1.8- pppwdult of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where theramq q 2gn2f qlme408(te is a uniform magnetic field in the +y direction. What is the direction of the magnetic 4q(nql mqm22te8afg0force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field pro(ufj s-zj ouo7(.jq3 o8qeosy8n9 y o6duced by a long straight current-carrying wire is

  At double the distance from a long aan2v wie/ i2+current-carrying wire, the strength of the magnetic field produced by ti2e a/aiw vn+2hat wire decreases to

  Two long parallel wires placed side-by-side on a horizontal tabl5k /h/g bvzv,x1jk-zke 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. /kkvx-vkj5bh z1z/,g 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 p-,qq jfl8+ovxl(k 5gyi9 wb(table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between thefvql(kx i89yb p5,o(wl+ jqg- two wires

  Two long parallel wires carry equal currents. The magnitude l0oc)n(o5hou lo 1xc n f*1r /x xw;bfco5,o8qof the force between the wires is F. The current in ecfu,nooq bc*1;hx0o(l/) 1colnooxr w5 x f 85ach 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*q.z0/ mrftccp- gdo. . A proton moves toward the east alongside aprdm0q fcctz /.og*.-nd just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the va,ze;j8( vmabottom of the page. What is the direction of the magnetic force it prodev a,(vj8a z;muces 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 placed side-by-. fb. -gg:sx w9g3sxktde q/0qside on a horizontal table. If the wires carry current in the same directi9/.qgtfgxe- bwk:x. dgsqs 3 0on,

  Two long parallel wires are placed sid,aq/ ,fqp;6t auqbz,; .mw adge-by-side on a horizontal table. If the wires carry current in oppof/qa;z d.,6;t aum ,pwga,b qqsite directions,

  Consider two current-carrying circular loops. Both are made from one strand of/si7cc )j e;+a h3dnzw,miw i, wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field a)nwew 7d,i ,ai/+m zi cc;hsj3t 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 tgs1hg0: *emvgx0kq 0(fhby z s7h)a(from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of th7gh h0b(q 1)(az*hse0mt :xg g0vfyske smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop m zs7:chq(v/i occurs when the angle between the loop's ma:iz(m7shq v/cgnetic moment and the magnetic field vector is

  When placed askew in a magnetil:l(fb uc 47wtc field, a current carrying loop that is free to rotate in any direction will experience a torque until(c4l:t7bwl f u its magnetic moment vector

  What fundamental fact underlies ipv66,/u ed-mmpb*rsthe operation of essentially all electric motors?rmp ,mu/v-ed6s ip*6b

  A circular wire loop lies:vq l:i : sinr4er f/1f:2qlfwtgy6e/ in a horizontal plane on a table 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 tends to lift off of the table because of the torque caused by the currents interaction w2nef:4w/:: vfsftr1grq li6: liey q/ith the magnetic field?

  In a mass spectrometer a particle of mass m and chajl,5dz0gwrw z9k1a m(rge 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 velocity of the particle. Derive an e0 9zgrwd w( zl,1mj5akxpression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a chac jeub(qv8 xdd(1/i1l x01dr crged particle passing through 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 dirlx d8u0eq1 /j1x(1vr bc didc(ected to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A ig/ hdt14jh6wev , i:m00cllka s oriented parallel to a uniform magnetic field owj 1:6 a ,e/vdh 0lcmkhg4tl0if
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 1 ,.: v/a oku*bq42zygmfxvy7qznmm;6uk10 dy0 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 when it u5o9s+ rtb nr n xm0x986ncvmrm(.e :qe8t(yx is placed in a magnetic field of 0.020 T? The wire mavx (tn96bx+qrrxm 88o .t en yesc5:0mnu(9mr kes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.0509rgt g/ paazqrv,v*1( kg and is in a magnetic field of 0.10 T. What minimum current in the rod is t, 9rg1 *ar(vapvq/ gzneeded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniju g gdv*- y/y)trkpy2.(i8dw form magnetic field of 0.20 T. What is the magnitude of the magnetiy -jdri.u )/gk(*vy8t2dwpgy c 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 sb gj. )woe blt6s:(:kpbx46t 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 5lm 7 i0ss/yxfspeed 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 dr+(fp /zm 4aoiue 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 aeobc ++d9ms( b 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 magnetic force of the electron.

  An electron moves with a4 z jcbxu-k w-o49ah/)yt1,nxl bw-uh 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 speedl7i6whot11yh )p n 1-nwea lzw.+ ijz/ 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 cu,/nqw:vn 8h 50ee/*fzx-q2qnonwx pgo/ p )xxrrent of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wirqzv8 /nq5x-exnnp2 p ,o /x* w/xhf)wo:gq0 nee?

  A high power line carrying 1000 A generates what magnetic field8 d mb+jyquj,, at the ground, 1q jy,b ,j8mud+0 m away?

  How much current must floz.: rgw;o dlvta s5yl*t2co :4w 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 currepnel;.f( ygb; nt of 5.0 A is the magnitude of the magnetic field due to t;f(gybn .e ;plhe wire equal to the strength 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 directio zxo7o3agk -4mns. 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 other?-7mx4goa3zk o

  Two long parallel wires carry currents of 20 A and 5.0 c j13x t0-2(.zc9q rifalwwjaA in opposite directions. The wires are separated by 0.20 m. What xqjwz.l(1ciaf2 t rjw 0c9- 3ais the magnetic field midway between the two wires?

  Two long parallel wires carry cm/g+n2 pzfq--gq k+i murrents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point betweenq+q/--p kgf z2mig +mn the two wires are the contributions from the two wires the same?

  Four long parallel wires each carnveqta138l nk7zq 8(gxbul6* ry 2.0 A 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 field does one of the wires experience due to the other wiresl*7euna 8 xb( zkgq6vn38l 1qt?

  Two long parallel wir*g7 rtehxu- 2jes carry currents of 5.0 A and 8.0 A in the opposite direction. The wi *rgt7ujh2-xeres are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic fiel0 w 3x 9ghadb1wok 8nrw)6synqz9+:mgd at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the xy 861n3bwzm g9nrsq) 9 +:o0wgwkhdawire?

  A solenoid 20 cm long is wound with 5000 turns of wirx pbsm(efj1,63:t ibicpp8x ,y- 8jwqe. What magnetic field is produced at the center of the solenoid when a current of 10 A fl6q :cx-8wf p8jmb, p(yise1 j3ip btx,ows?

  A solenoid with 500 turns is/+o7 57lpyhd ed5:r9osc thpa 0.10 m long and carries a current of 4.0 A. What strength of magneti hplpe odo9 c577:s/t hr+y5adc field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a :dq1ganhdp+m,. m.c c 1.0-T magnetic field at, dgac.1mh+ mdq:.pnc the center?

  How many turns should a 10-cm long me qaebppd83v1tm9tb8 s4m6 4pww m6-solenoid 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 of 14rwwfv kn80.d20 turns that carries 6.0 A inv.0rww 4fd8k f its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnuvp 7yz z1z7a/etic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when 1z7vzp7 y/auz the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-seszgbe:p;au rhym 6 voh.942n)ctional 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 current of 2z4udlm(-5wy a(ahp. nb,i b ;l.0 A is in a magnetic field of 3.5 T. The loop has an are5.bi;bay- l pwh,(l d4an(m zua 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 rad v ec9//yye8d*tx7ez mius 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 parallel to the magnetic ftceym9z8 ey*vd / 7x/eield?

  A circular loop of wire of radius 0.50 m is in a a; .ks lus; fy3r;xi-z:y b6bbuniform 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 pa;s6axu b r;.fyy;-i 3zsl:kbb rallel to the magnetic field?

  A circular wire loop of ar pbtp 9n(rjg0ih gvog /o,+7x9ea $0.25 \; m^{2}$ 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 singleqn-w+3iday q 1-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 velocityt 6ki.w;ksxhn-p 9cu 06jovmmnh 49o4 $6.9 \times 10^6 \; m/s$ 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 throuapo xfq* 05cxyb 7w),*. dil.abryv-agh a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proto)w. ab0aq bxl oiv*a y,7yp5xdr .f*-cn's resulting orbit?

  A proton is accelerated fromxuzh*8(yt li 3wrey4/r+ c su piz:1q6 rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular t3p:y4(1/6rzwx erz tch+ ly8s i*iuuqo its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated throeh nd1q wjwa/u:f(- j8tu. vk6ugh 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 if the particles are 1(t-n6v8: we.uw/hd jkqjfuato be undeflected?