Nunn, J W (2014) Educational inductive gravimeter. Phys. Educ., 49 (1). pp. 41-49.

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Abstract

A simple inductive gravimeter constructed from a rigid plastic pipe and insulated copper wire is described. When a magnet is dropped through the vertically mounted pipe it induces small alternating voltages. These small signals are fed to the microphone input of a typical computer and sampled at a typical rate of 44.1 kHz using a custom computer program. Knowing the geometrical dimensions of the gravimeter and calculating the time intervals between peaks of the recorded signal it is possible to calculate gravity. Limitations and improvements are discussed. Instructions are included throughout so that teachers and pupils can replicate the experiment in their own school.

Item Type:	Article
Keywords:	Educational, induction, gravity
Subjects:	Advanced Materials Advanced Materials > Metals and Alloys
Identification number/DOI:	10.1088/0031-9120/49/1/41
Last Modified:	02 Feb 2018 13:14
URI:	http://eprintspublications.npl.co.uk/id/eprint/6076

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