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Code Number: 5H10.15
Demo Title: Dip Needle
Condition: Excellent
Principle: Magnetic Field Indicators
Area of Study: Electricity & Magnetism
Equipment:
Dip needles.
Procedure:
Align the dip needle with the north/south magnetic poles of the Earth. For our location the dip needles should have an angle of approximately 72 or 73 degrees from the horizontal.
The Pasco dip needle unit is capable of quantitative measurements of the Earth's magnetic field. Instructions for the unit are in the 5H10.15 pdf file folder.
References:
- Leonid Minkin, Daniel Sikes, "Measuring the Magnetic Field Vector of Earth", TPT, Vol. 60, #3, March 2022, p. 200.
- Si Wang, Shiqi Huang, Chenchen Liu, Ziqian Tang, Qingfan Shi, Jurgen Schulte, "A Simple Method to Measure the Local Geomagnetic Field Accurately in a First-Year Physics Laboratory", TPT, Vol. 59, #1, Jan. 2021, p. 44.
- Samuel Derman, "Simple Demonstration of the Earth's Magnetic Field", TPT, Vol. 43, #2, Feb. 2005, p. 68.
- Farhang Amiri and Rondo N. Jeffery, "Simple Experiments to Study the Earth's Magnetic Field", TPT, Vol. 42, #8, Nov. 2004, p. 458.
- Samuel Derman, "A Pointed Demonstration of Surface Tension", TPT, Vol. 29, #6, Sept. 1991, p. 414.
- J. E. Fredrickson, "Magnetic Field of Earth and Magnetic Dipole Moment - An Experiment", AJP, Vol. 43, #2, Feb. 1975, p. 186.
- B-115: "Needle - Floating & Dipping", DICK and RAE Physics Demo Notebook.
- Robert J. Reiland, "Laboratory Activity 9: The Earth's Magnetic Field", Teaching About Magnetism, p. 3.34.
- Isaac Asimov, "Iron, Cold Iron", Fantasy and Science Fiction Magazine.
- Isaac Asimov, "From Pole to Pole", Fantasy and Science Fiction Magazine.
- H.J. Press, "Dip to the Pole", Giant Book of Science Experiments, p. 61.
- Janice VanCleave, "9, Variation", Geography for Every Kid: Easy Activities that Make Learning Geography Fun.
- Janice VanCleave, "13, Back and Forth", Magnets, p. 52.
- Rudolf F. Graf, "Magnetic Dip or Inclination", Safe and Simple Electrical Experiments, p. 60.
- Joseph Frick, "#227 & 228, & 229 - Declination of the Needle & Dip of the Needle & Influence of Terrestrial Magnetism on Iron", Physical Technics: Or Practical Instructions for Making Experiments in Physics and the Construction of Physical Apparatus with the Most Limmited Means, p. 251 & 252.
- D. Colson, C. J. Lapp, J. A. Eldridge, "Experiment LII", 1936 Univ. of Iowa Physics Laboratory Manual, p. 53.
- "Small Dipping Needle with Graduated Arc", Pike's Illustrated Catalogue of Scientific & Medical Instruments, Pike's Illustrated Descriptive Catalogue of Optical, Mathematical, and Philosophical Instruments, 1984, p. 8.
- The Queen Catalogues Vol. II, Catalogue of Physical Instruments, No. 5139, p. 73.