Experiments with charge indicator based on bipolar transistors

Abstract

A simple charge indicator with bipolar transistors described recently enables us to perform a number of experiments suitable for high-school physics. Several such experiments are presented and discussed in this paper as well as some features of the indicator important for its use in schools, namely its sensitivity and robustness, i.e. the capability to withstand various potentially harmful conditions.

Keywords

• physics education
• simple experiments
• electrostatics