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For what purpose is a PNP junction transistor is used? Explain in detail how it is used. b) If you have pure Si, P, Ge, As, Ga, and Al materials which ones would you choose to create a PNP junction transistor and why?
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Figure 1 shows a system of two blocks A weighs 1800 N and B weighs 2200 N, are lying on inclined planes. The two blocks are connected by a uniform horizontal rod of weight 800 N. Determine (a) the reaction of each block on the plane surfaces (b) the compression force of the rod on blocks A and B (c) the value of force P to impend the block A upward. Take the coefficient of friction for all the surfaces as 0.3