Question

When transistors are used in digital circuits they usually operate in the . (a) active region (b) breakdown region (c) saturation and cutoff regions (d) linear region

Answer 1

Answer: Saturation and Cut off region

Explanation:

In saturation region transistor acts as closed switch and in cut off region it acts as open switch. In digital circuits o/p can be '0' or '1'. So when in saturation region means closed switch it gives output '1' and in cut off region means open switch it gives o/p '0'.

Answer 2

Answer:

The correct answer is option (c) saturation and cutoff regions.

Explanation:

In the saturation zone, the transistor acts as a closed switch, whereas in the cutoff zone, it acts as an open switch. In digital circuits, o/p can be a '$0$' or a '$1$.'

• In the saturation area the transistor works as a closed switch and as an open switch in the cutoff zone. o/p can be a '$0$' or a '$1$' in digital circuits.
• So, in the saturation region (closed switch), output '1' is produced, whereas in the cut off region (open switch), output '$0$' is produced.

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