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8.International.What is the current through the3-Ωresistor?A – 3
Second Long ExamSecond Semester, AY 2015–2016Physics 729.FILBR.A5-mwire carrying a current of10 Ais bent in half such that the angle betweenthe two equal segments is135◦. It is then placed in a uniform magnetic field of80 mTdirected into the page as shown. What is the net magnetic force experienced by the wire?For the next two items, consider anegativelycharged parti-cle, with the indicated initial velocity, immersed in the magneticfield lines shown.10.B-vector.What is the direction of the magnetic field at theindicated position of the charged particle?11.v-vector.In what direction will the charged particle be de-flected at this instant?A.-ˆB.+ˆC.-ˆkD.+ˆk12.B-flux.A magnetic field with magnitudeBpassesthrough a loop with areaAat60◦as shown.What isthe magnitude of the magnetic flux through the loop?2BAA – 4
Second Long ExamSecond Semester, AY 2015–2016Physics 7213.Octahedron.Consider a regular octahedron as shown. Thenet magnetic fluxthrough the upper four triangular faces dueto a current-carrying wire is+4Φ. What is the magnetic fluxthrough the lower four triangular faces?14.Magkaiba Tau.Two identical circular loops with areaAand carrying the same currentIare centered at the origin in a region of uniform magnetic fieldB=B0ˆı. One loop is instable equilibrium while the other has a magnetic dipole moment oriented60◦with respectto the+x-axis. What is the absolute difference of the torque magnitudes on the loops?15.Stable.Three strong magnets and an unmagnetized iron bar X are arranged in a stableconfiguration as shown. Which of the following arrangements will also be a stable config-uration given that the iron bar is not permanently magnetized?A.B.C.D.A – 5
Second Long ExamSecond Semester, AY 2015–2016Physics 72For the next two items, consider an electron with speedvtravelling perpendicular to a uniformmagnetic field of magnitude5 mT.
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Spring '11
Departmental
Physics, Magnetic Field, d., A., B., c., College of Science