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Project Electrical Engineer Interview Questions

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Q2: A pnp transistor with its base connected to a voltage source, the V source is connected to a +10V source. The emitter of the transistor is connected to a resistance, and then to the same +10V source. The collector side is connected to a capacitor, which is not charged at t=0-. Given the graph of Vsource = 10 V stepping up at t = 0 to further, draw the graph of Vout. Vout is between the point of collector and capacitor.

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ANS: Vout should be constantly -10V until t=0, and will hit V=0 V linearly from V=-10 V after t=0.

Hi, Can you explain why it linearly increases? Are you assuming that Collector is tied to -10V? The pnp transistor is completely cutoff for the given biasing. The only way the capacitor is going to charge is through leakage currents. It is very slow and takes a lot of time. Please advise me if my analysis is correct.

BJT and Mos circuits

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Be prepared to answer electronics fundamentals questions and analyze real circuits on the spot.

Power drawn from a bulb, mesh analysis, gain of BJT Amp

Basic HR behavioral questions. Just use the star approach.

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Design a DC to DC voltage converter and compare the advantages and disadvantages between different solutions.

Derive Friis transmission equation.

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How you see yourself in the next five years. A lot of technical questions to make sure you know the stuff they wanted you to know.

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Basic Electrical Engineering question (switches, bulbs, circuits etc.)

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