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The size of a power transistor is made considerably large to ________

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The size of a power transistor is made considerably large to ________

(a) Provide easy handling

(b) Dissipate heat

(c) Facilitate connections

(d) Larger Gain

I had been asked this question in an international level competition.

This intriguing question comes from Class B Output Stage topic in portion Differential and Multistage Amplifiers of Electronic Devices & Circuits

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Correct choice is (b) Dissipate heat

The explanation is: Power amplifiers handle large signals as compared to voltage amplifiers. The size of power transistors is made considerably large to dissipate heat. Low efficiency of power amplifiers results in more battery consumption.

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