JOURNAL ARTICLE

Graphite-paper circuit elements: Resistor, capacitor, and π value estimation.

  • Published In: Physics Teacher, 2023, v. 61, n. 2. P. 154 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Shekhawat, Vibhooti 3 of 3

Abstract

This article focuses on demonstrating the electrical properties of graphite in shading pencils to explore the dependence of resistance and capacitance on physical parameters and to estimate the value of π electrically. By shading paper with pencils of varying graphite-to-clay ratios, resistors and capacitors are constructed, with resistance shown to vary linearly with length, width, and pencil grade, while capacitance depends on the shaded area. Using an LCR meter, the study measures resistance in circular graphite patterns to calculate π without physical measurements, yielding an average value close to the mathematical constant. The materials used are affordable and accessible, making the activities suitable for educational demonstrations and interactive learning.

Additional Information

  • Source:Physics Teacher. 2023/02, Vol. 61, Issue 2, p154
  • Document Type:Article
  • Subject Area:Engineering
  • Publication Date:2023
  • ISSN:0031-921X
  • DOI:10.1119/5.0077435
  • Accession Number:161484493
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