Electronics questions | form six Physics

Why is NAND gate considered as a basic building block for a variety of logic circuits?

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UNSOLVED

Produce a truth table for the gate shown in Figure 3 hence show that it behaves as AND
gate.

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UNSOLVED

Mention four important properties of a semiconductor.

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Applying the concept of doping, explain how a free electron and a positive charge can be
created in a semiconductor crystal.

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(i) Why a p-n junction diode when connected in a circuit and then reversed gives a very small leakage current across the junction?
(ii) How is the size of the current stated in (i) depends on the temperature of the diode?

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UNSOLVED