A steel bar has a cross-sectional area of 10-³ m², Young's modulus of 2 × 10" Pa and Poisson's ratio of 0.4. If the bar is subject to a compressive force of 10° N, find the corresponding longitudinal and transverse strains. 8.17 8.18 Two strain gauges, each with an unstrained resistance of 120 N and a gauge factor of 2.0, are bonded onto the steel bar of Problem 8.17 so that one measures the longitudinal strain and one the transverse strain. Find the corresponding gauge resistances for the longitudinal and transverse strains.

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BJT (Bipolar Junction Transistor)

A BJT is a semiconductor device with 3 terminals that consist of a p-n junction diode that can amplify the signal or current. It is a current-controlled device. The three BJT terminals are base, collector, and emitter. The BJT works with the charge carrier, the two type of carriers in the BJT are holes and electrons, the charge carriers flow by the process of recombination. The signal to be amplifier is generally given as the input at the base terminal and an amplified form of it is available at the collector terminal.