Question

Crossing this quantity with the B-field gives torque. For 10 points each:
[10h] Name this quantity that describes the strength and orientation of a magnetic field. This quantity equals current times enclosed area for a loop of current.
ANSWER: magnetic moment [or magnetic dipole moment; prompt on dipole moment; reject “electric dipole moment”; reject “magnetic flux”]
[10e] The intrinsic magnetic moment of an electron is approximately one times this physicist’s namesake magneton. Electrons orbit a positive nucleus in this Danish physicist’s model of the atom.
ANSWER: Niels Bohr [or Niels Henrik David Bohr; accept Bohr magneton or Bohr model]
[10m] A type of this phenomenon named after Joseph Larmor is caused by a magnetic moment in an external magnetic field. The gyroscopic form of this phenomenon is torque induced.
ANSWER: precession [accept Larmor precession; gyroscopic precession or torque-induced precession]
<Physics>

Back to bonuses

Summary

2024 ACF Fall at CornellfallY914.44100%33%11%
2024 ACF Fall at Ohio StatefallY811.25100%13%0%
2024 ACF Fall at WashingtonfallY611.67100%17%0%
2024 ACF Fall at GeorgiafallY1214.1792%25%25%
2024 ACF Fall at North CarolinafallY910.0089%11%0%
2024 ACF Fall at Claremont CollegesfallY520.00100%60%40%
2024 ACF Fall at RutgersfallY815.00100%50%0%
2024 ACF Fall at IllinoisfallY916.67100%44%22%

Data

Illinois AChicago B10101030
Illinois CPurdue C010010
Notre Dame CIndiana1010020
Iowa AIllinois D010010
Northwestern AIowa B0101020
Northwestern BWashU A010010
Notre Dame AWashU B0101020
Notre Dame BSIUE010010
Purdue BIllinois B0101020