Question

why is collector wider than emitter and base in a transistor?​

Answer 1

Answer:

The collector region is the largest of all regions because it must dissipate more heat than the emitter or base regions. It is designed to be large because in order to dissipate all the heater, the extra surface area allows it to do so. ... The larger area ensures that it has more surface area to dissipate heat.

Answer 2

To remove all of the heat, the collector is designed to be huge.

Explanation:

Sandwiching a thin layer of P-type semiconductor between two N-type semiconductors or a thin layer of n-type semiconductor between two P-type semiconductors results in a junction transistor.

Emitter, Base, and Collector are the three primary zones of the transistor.

• The majority of charge carriers in the transistor come from the emitter.
• The base is sparsely doped and thin. This decreases the base transit time, preventing recombination of the charge from the emitter at the base and allowing it to flow directly to the collector for optimal efficiency.
• The collector zone is slightly larger than the other two regions, and it is moderately doped. The collector's primary function is to gather the majority of charge carriers from the emitter.