Publication:
A robust experimental setup for Johnson noise measurement suitable for advanced undergraduate students

Issued Date

2018-01-01

Resource Type

Article

ISSN

13616404
01430807

DOI

10.1088/1361-6404/aadc8b

Other identifier(s)

2-s2.0-85054099903

Rights

Mahidol University

Rights Holder(s)

SCOPUS

Bibliographic Citation

European Journal of Physics. Vol.39, No.6 (2018)

Suggested Citation

Thaned Pruttivarasin A robust experimental setup for Johnson noise measurement suitable for advanced undergraduate students. European Journal of Physics. Vol.39, No.6 (2018). doi:10.1088/1361-6404/aadc8b Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/47372

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Title

A robust experimental setup for Johnson noise measurement suitable for advanced undergraduate students

Author(s)

Thaned Pruttivarasin

Other Contributor(s)

Mahidol University
 Commission on Higher Education

Abstract

© 2018 Institute of Physics Publishing. All rights reserved. We present a durable and inexpensive construction of a Johnson noise experiment suitable for advanced undergraduate students. By measuring the root-mean-square voltage noises for different resistors and taking into account the input capacitance of the amplifier circuit, we demonstrate that the experimental setup is capable of measuring the value of the Boltzmann's constant to be kB = (1.381 ? 0.009) 10-23 J K-1. The setup also allows us to determine the capacitance of an RG-58/U cable to be 80?-?3 pF m-1. We also provide observations from two years of teaching this experiment, containing common student pitfalls. Finally, we discuss possible adjustments of the experiment according to a time constraint.

Keyword(s)

Physics and Astronomy

Availability

URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/47372

Collections

Scopus 2018