In the working of a transistor, emitter-base junction is forward biased while collector-base junction is reverse biased. Why?

2

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In normal case, emitter-base junction is the forward bias and collector-base junction is reverse biased. What will happen if emitter is reverse biased and collector is forward biased?

2

(a)

Two car generates have a common gate which needs to open automatically when a car enters either of the garages or cars enter both. A circuit, that resembles this situation using diodes for this situation.

2

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A Zener of power rating 1 W is to be used as a voltage regulator. If Zener has a breakdown of 5 V and it has to regulate voltage which fluctuated between 3 V and 7 V, what should be the value of R_S for safe operations as shown below figure?
   

2

(a)

Give a brief explanation that how a NOT gate is realised Using NAND gate.

2

(a)