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Which of the following regions of operation are mainly responsible for heating of the transistor under switching operation? 1. Saturation region 2. Cut-off region 3. Transition from saturation to cut-off 4. Transition from cut-off to saturation

Which of the following regions of operation are mainly responsible for heating of the transistor under switching operation? 1. Saturation region 2. Cut-off region 3. Transition from saturation to cut-off 4. Transition from cut-off to saturation Correct Answer 1, 3, and 4 only

The regions of operation which are mainly responsible for heating of the transistor under switching operation are:

1. Saturation region.

2. Transition from cutoff to saturarion.

3. Transition from saturation to cutoff.

Explanation:

In the saturation region, a transistor is biased in such a way that maximum base current is applied that results in maximum collector current and minimum collector-emitter voltage. This causes the depletion layer to become small and to allow maximum current flow through the transistor therefore more heat dissipation occurs at the collector terminal.

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