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ERIC Number: EJ1165560
Record Type: Journal
Publication Date: 2018-Mar
Pages: 6
Abstractor: As Provided
ISSN: ISSN-0031-9120
A Fieldmill for Measuring Atmospheric Electricity
Thompson, Frank
Physics Education, v53 n2 Article 025004 Mar 2018
It is a well known fact that the Earth carries a net negative charge that produces a downward electrostatic field. The present experiment shows how this field can be measured with a Field Mill which has been constructed from components readily available in the Laboratory. In fine weather conditions a value of 120 (±10) V m[superscript -1] was obtained which agrees with data in the literature. However, when a thunder storm was approaching preliminary measurements showed that the field varied between +400 V m[superscript -1] and -1000 V m[superscript -1] thus indicating complex charge states of the approaching clouds. Suggestions are made for improving the sensitivity of the apparatus so that experiments can be carried out for other weather conditions.
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A