Activity I: Identify E, B, and C of the transistor and measure the hFE (or β) of the given PNP transistor, as shown below, using the blue digital multimeter (DMM).Ģ.2. The hFE is normally seen to be a constant value, normally around 10 to 500, but it may change slightly with temperature and with changes in collector-to-emitter voltage. The formula is: IC= hFEIB=βIB So if 1mA is fed into the base of a transistor and it has a hFE of 100, the collector current will be 100 mA. The base current is then amplified by hFE to yield its amplified current. A transistor works by feeding a base current into the base of the transistor. hFE (which is also referred to as β) is the factor by which the base current is amplified. hFE (or β) of a transistor: () hFE of a transistor is the current gain or amplification factor of a transistor. d.ĭefine a transistor What is a semiconductor? What is a p-type semiconductor? What is an n-type semiconductor?ģ. Watch the following video for an introduction of Transistor, and answer the following questions: a. Measured in one of the labs this semester?_ Write the values of e =_ and k=_ 2. Fundamental constants are used extensively in the sciences. Name:_ Partner(s):_ Purpose: In this lab we will measure the ratio of two fundamental constants, namely e/k, using a transistor. Transistor, Breadboard, and Measuring e/k
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